ASTM D7043-21

Standard Test Method for Indicating Wear Characteristics of Non-Petroleum and Petroleum Hydraulic Fluids in a Constant Volume Vane Pump

SIGNIFICANCE AND USE
5.1 This test method is an indicator of the wear characteristics of non-petroleum and petroleum hydraulic fluids operating in a constant volume vane pump. Excessive wear in vane pumps could lead to malfunction of hydraulic systems in critical applications.
SCOPE
1.1 This test method covers a constant volume vane pump test procedure operated at 1200 r/min and 13.8 MPa.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 Exception—There are no SI equivalents for the inch fasteners and inch O-rings that are used in the apparatus in this test method.  
1.2.2 Exception—In some cases English pressure values are given in parentheses as a safety measure.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Nov-2021
• ICS: 75.120 - Hydraulic fluids
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.N0 - Hydraulic Fluids

Relations

• Refers: ASTM D6300-24 - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, and Lubricants
• Effective Date: 01-Mar-2024
• Refers: ASTM D4175-23a - Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
• Effective Date: 15-Dec-2023
• Refers: ASTM D6300-23a - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, and Lubricants
• Effective Date: 01-Dec-2023
• Refers: ASTM D4175-23e1 - Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
• Effective Date: 01-Jul-2023
• Refers: ASTM D6300-19a - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 01-Dec-2019
• Refers: ASTM D6300-16 - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 01-Apr-2016
• Refers: ASTM D6300-15 - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 01-Jun-2015
• Refers: ASTM D6300-14a - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 01-Jun-2014
• Refers: ASTM D6300-14ae1 - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 01-Jun-2014
• Refers: ASTM D6300-14 - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 01-May-2014
• Refers: ASTM E177-14 - Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• Effective Date: 01-May-2014
• Refers: ASTM D6300-13a - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 01-Dec-2013
• Refers: ASTM D6300-13 - Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
• Effective Date: 15-Jul-2013
• Refers: ASTM E177-13 - Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• Effective Date: 01-May-2013
• Refers: ASTM E691-13 - Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• Effective Date: 01-May-2013

Overview

ASTM D7043-21 is a standardized test method developed by ASTM International for evaluating the wear characteristics of both petroleum and non-petroleum hydraulic fluids in a constant volume vane pump. Excessive wear in hydraulic pumps can lead to malfunctions and decreased performance, particularly in demanding or critical hydraulic system applications. This method provides industry professionals with an objective means to assess the potential for wear in hydraulic fluids, supporting better fluid selection and enhanced equipment reliability.

Key Topics

• Objective: Provides a reproducible procedure to assess wear characteristics of non-petroleum and petroleum-based hydraulic fluids under standardized conditions using a rotary vane pump.
• Test Conditions: Operates the vane pump at 1200 r/min and 13.8 MPa, with strict control of fluid volume and temperature according to the fluid type.
• Wear Measurement: The primary result is the total mass loss from the pump’s cam ring and vanes after a 100-hour test cycle, providing an indicator of fluid-induced wear.
• Applicability: Suitable for synthetic, petroleum, and water glycol-based fluids.
• Safety and Precision: Includes detailed guidance on apparatus setup, maintenance, and safety measures to ensure repeatability and minimize risk.

Applications

This ASTM D7043-21 test method has widespread practical value in several industries and operational environments that rely on hydraulic systems, including:

• Industrial Machinery: Maintenance teams use the data from this test to select hydraulic fluids with proven low-wear characteristics, minimizing equipment downtime and extending pump life.
• Aerospace and Defense: Ensures that hydraulic fluids used in critical systems perform reliably, reducing the risk of catastrophic failures due to pump wear.
• Automotive and Heavy Equipment: Fluid manufacturers and original equipment manufacturers (OEMs) use this standard in product development and quality assurance to certify new hydraulic fluids.
• Fluid Certification: Laboratories utilize the test method for comparing formulations, meeting regulatory or buyer specifications for durability and equipment compatibility.
• Aftermarket Fluid Validation: Distributors and OEMs validate the suitability and longevity of fluids before recommending them to customers.

Related Standards

For a comprehensive understanding and application of hydraulic fluid testing, users may also refer to related ASTM standards:

• ASTM D2882: Test Method for Indicating Wear Characteristics of Hydraulic Fluids in Vane Pumps (Withdrawn)
• ASTM D4175: Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
• ASTM D6300: Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, and Lubricants
• ASTM E177: Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E691: Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Practical Value

• Predictive Maintenance: Using ASTM D7043-21, maintenance professionals can proactively identify hydraulic fluids that minimize wear, optimizing service intervals and lowering maintenance costs.
• Quality Assurance: Manufacturers can use the test results both to certify new applications and to benchmark their fluids against industry standards, offering greater assurance to their customers.
• System Safety: By highlighting potent wear issues, the test supports the implementation of more robust hydraulic systems, especially crucial in sectors where failure is not an option.
• Comparative Evaluation: Laboratories, OEMs, and users can objectively compare the performance of various fluids, supporting data-driven purchasing or specification decisions.

By employing ASTM D7043-21, organizations ensure higher reliability and longevity of hydraulic equipment, increased safety, and a data-backed approach to hydraulic fluid selection and validation.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7043 − 21
Standard Test Method for
Indicating Wear Characteristics of Non-Petroleum and
Petroleum Hydraulic Fluids in a Constant Volume Vane
Pump
This standard is issued under the fixed designation D7043; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* Fuels, and Lubricants
D6300Practice for Determination of Precision and Bias
1.1 This test method covers a constant volume vane pump
Data for Use in Test Methods for Petroleum Products,
test procedure operated at 1200r⁄min and 13.8MPa.
Liquid Fuels, and Lubricants
1.2 The values stated in SI units are to be regarded as
E177Practice for Use of the Terms Precision and Bias in
standard. No other units of measurement are included in this
ASTM Test Methods
standard.
E691Practice for Conducting an Interlaboratory Study to
1.2.1 Exception—There are no SI equivalents for the inch
Determine the Precision of a Test Method
fastenersandinchO-ringsthatareusedintheapparatusinthis
test method. 3. Terminology
1.2.2 Exception—In some cases English pressure values are
3.1 Definitions of Terms Specific to This Standard:
given in parentheses as a safety measure.
3.1.1 flushing, v—process of cleaning the test system before
1.3 This standard does not purport to address all of the
testing to prevent cross-contamination.
safety concerns, if any, associated with its use. It is the
3.1.2 snubber, n—fluid restricting device used to dampen
responsibility of the user of this standard to establish appro-
pressure pulsations.
priate safety, health, and environmental practices and deter-
3.1.3 torquing, v—processoftighteningthepumpheadbolts
mine the applicability of regulatory limitations prior to use.
to achieve a uniform clamping force.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Summary of Test Method
ization established in the Decision on Principles for the
4.1 An amount of 18.9L 6 0.5L of a hydraulic fluid are
Development of International Standards, Guides and Recom-
circulated through a rotary vane pump system for 100h at a
mendations issued by the World Trade Organization Technical
pump speed of 1200r⁄min 6 60r⁄min and a pump outlet
Barriers to Trade (TBT) Committee.
pressure of 13.8MPa 6 0.3MPa (2000psi 6 40psi). Fluid
temperature at the pump inlet is 66°C 6 3°C for all water
2. Referenced Documents
2 glycols, emulsions, and other water containing fluids and for
2.1 ASTM Standards:
petroleum and synthetic fluids of ISO Grade 46 or lower
D2882Test Method for Indicating Wear Characteristics of
viscosity. A temperature of 80°C 6 3°C is used for all other
Petroleum and Non-Petroleum Hydraulic Fluids in Con-
synthetic and petroleum fluids.
stant Volume Vane Pump (Withdrawn 2003)
D4175Terminology Relating to Petroleum Products, Liquid 4.2 The result obtained is the total mass loss from the cam
ringandthetwelvevanesduringthetest.Otherreportedvalues
are initial flow rate and final flow rate.
This test method is under the jurisdiction of ASTM Committee D02 on
4.3 The total quantity of test fluid required for a run is
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.N0 on Hydraulic Fluids. 26.5L.
Current edition approved Dec. 1, 2021. Published December 2021. Originally
approved in 2004. Last previous edition approved in 2017 as D7043–17. DOI:
5. Significance and Use
10.1520/D7043-21.
5.1 This test method is an indicator of the wear character-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
istics of non-petroleum and petroleum hydraulic fluids operat-
Standards volume information, refer to the standard’s Document Summary page on
ing in a constant volume vane pump. Excessive wear in vane
the ASTM website.
pumps could lead to malfunction of hydraulic systems in
The last approved version of this historical standard is referenced on
www.astm.org. critical applications.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7043 − 21
6. Apparatus 6.1.4.5 If the reservoir is positioned so that the contents
cannot be visually checked for aeration by removing the lid, a
6.1 The basic system consists of the following (see Fig. 1):
fluid-tight glass viewing port may be located in the side of the
6.1.1 AC Motor, 1200r⁄min, or other suitable drive, with
reservoir.
11kW (15hp) as suggested minimum power requirement
6.1.4.6 In the reservoir return line the drop tube end may be
(Item 5, Fig. 1). The motor must have right hand rotation
cut at a 45° angle for better return flow characteristics.
(counterclockwise rotation as viewed from the shaft end).
6.1.5 Outlet Pressure Control Valve,Eaton-Vickerspressure
6.1.1.1 When constructing the test stand some users build
relief valve (CT-06F or CS-06F, to 10.3MPa to 20.7MPa)
theteststandusingavariablespeedmotorsothatother,similar
with either manual or remote control (Item 8, Fig. 1).
tests such as ISO 20763 (1440rpm) may be performed using
6.1.6 Temperature Control Device, suitable for controlling
the same apparatus.
coolant flow to the heat exchanger to maintain test fluid at the
6.1.2 Test Stand Base, with appropriate, rigid mounting for
specified temperature (Item 11, Fig. 1).
the motor, pump, reservoir, and other components.
6.1.7 Temperature Indicator, (Item 2, Fig. 1) shall have an
6.1.3 Rotary Vane Pump, replaceable cartridge type. A
accuracy of 61°C and shall have an appropriate sensor to
Conestoga USA B1 housing is used along with internal
monitor pump inlet temperature.
components from Conestoga USA, Inc. Vickers housings
6.1.7.1 To prevent a flow restriction near the pump inlet
V104CandV105Careacceptableforuseinthistestwhenused
port, the temperature probe shall have a diameter of not more
withCamRingsandVanesfromConestogaUSA,Inc.Referto
than 3.2mm.
D7043–17 for Vickers assembly part numbers and advisories
6.1.7.2 The test fluid temperature shall be measured using
concerningtheiruse.Theassemblyshouldproduce28.4L⁄min
the B1 pump sensor port. The sensing probe shall be inserted
flow at 1200r⁄min with ISO Grade 32 fluid at 49°C, at
into the midpoint of flow.
6.9MPa (Item 3, Fig. 1; Fig. 2).
6.1.3.1 The replaceable cartridge consists of the cam ring, NOTE 2—Some users have found the addition of a pump outlet
temperature sensor to be a useful diagnostic tool. If used, it shall be
therotor,twobushings,asetoftwelvevanes,andanalignment
suitable for 13.8MPa duty and should be placed in the high pressure line
pin.
between the pump and the relief valve (Item 18, Fig. 1).
6.1.3.2 The individual cartridge parts are purchased sepa-
6.1.8 Heat Exchanger,(Item10,Fig.1).Theheatexchanger
rately. Conestoga USA, Inc. part numbers for these items are:
should be of adequate size and design to remove the excess
cam ring No. 2882-5, alignment pin No. 2882-10, rotor No.
heat from the test system when using the available coolant
2882-1D, bronze bushings No. 2882-4C and 2882-4E, and
supply.
vane kit (12 vanes) No. 2882-V12A.Alternate bushings with a
TiN coating are available (part No. 2882-4F and 2882-4G) for
NOTE 3—It is suggested that a shell-and-tube-type heat exchanger, if
use where bushing wear has been a problem. used,shouldbeconnectedinreverse(thehydraulicfluidispassedthrough
the tubes and not around them) so that the interior of the heat exchanger
6.1.4 Reservoir, (Item 1, Fig. 1).
can be effectively cleaned between tests.
6.1.4.1 The reservoir shall be equipped with a removable
6.1.9 Pressure Indicator, (Item 6, Fig. 1) to measure pump
baffle and a close fitting lid, all of stainless steel construction.
dischargepressureshallhaveanaccuracyofatleast 60.3MPa
The reservoir can be square or rectangular (with a flat bottom)
at 13.8MPa. The gauge shall be suitable for 13.8MPa duty.
or cylindrical (with a spherical or cone shaped bottom) and
6.1.9.1 The pressure indicator should be snubbed (Item 7,
must be designed so as to avoid air entrainment in the fluid.
Fig. 1) to prevent damage or inaccurate readings from pulsa-
NOTE 1—A suitable reservoir design is presented in Test Method
tions or sudden fluctuations of system pressure.
D2882–00.
6.1.10 Filter Unit (Item 9, Fig. 1), a replacable element or
6.1.4.2 To promote deaeration and thermal mixing of the
spin-on type filter, having a fiberglass element, are both
fluid, the baffle shall be designed so that returning fluid will
acceptable. The element shall have a minimum Beta Ratio of
follow an indirect path from the return port to the outlet port.
100 for 3µm size particles (β3 = 100, Filtration Efficiency =
6.1.4.3 To avoid air entrainment, the reservoir shall be
99.0%). One new filter element is required for each test.
designed so that the return line enters well below the fluid
6.1.10.1 The filter housing shall be non-bypassing and shall
level,fluidflowdoesnotcascadeoverthebaffle,andtherewill
be provided with a pressure gauge (Item 13, Fig. 1) or another
be a minimum of 15 cm of fluid depth above the reservoir
suitable indicator to monitor pressure across the filter to warn
outlet Dimension C, Fig. 1).
of impending collapse of the element.
6.1.4.4 Fluid ports may be added as required by the user for
6.1.10.2 The rated collapse pressure of the filter element
the installation of a low level switch, reservoir temperature
should be known. The collapse pressure should be within the
sensor, bottom drain, and so forth.
range of the gauge.
6.1.11 Flow Measuring Device, (Item 12, Fig. 1) with an
accuracy of at least 60.4L⁄min.
The sole source of supply of the apparatus known to the committee at this time
is Conestoga USA Inc., P.O. Box 3052, Pottstown, PA 19464. If you are aware of
alternative suppliers, please provide this information to ASTM International
Headquarters.Your comments will receive careful consideration at a meeting of the Request Vickers publication I-3369-S for the relief valve service data. See
responsible technical committee, which you may attend. http://hydraulics.eaton.com/products/vickers.html.
D7043 − 21
Item Description (Required if otherwise noted)
1. Reservoir
2. Inlet Temperature Sensor
3. Conestoga B1 Pump
4. Flexible Coupling
5. Motor
6. High Pressure Gauge/Sensor
7. Pulsation Dampening Valve
8. Relief valve
9. Filter, β = 100 Minimum Performance
3µ
10. Heat Exchanger
11. Temperature Control Valve
12. Flow Meter
13. Low Pressure Gauge/ Filter Indicator
14. Drains
15. Pump Inlet Valve (Not required)
16. Return Line Valve (Not required)
17. Inlet Vacuum Gauge/Sensor (Not required)
18. Outlet Temperature Sensor (Not required)
19. Case Drain for B1 pump
A. 61 to 66 cm, Vertical
B. 15 cm, Minimum Horizontal
C. 15 cm, Minimum Vertical
FIG. 1 System Schematic
D7043 − 21
FIG. 2 Conestoga USA, Inc., B1 Pump Assembly
6.1.12 While not required, it is suggested that low-level, 6.2.4 The reservoir shall be located above the pump so that
high-pressure, high-temperature, and low-flow safety switches thefluidlevelinthereservoirwillbebetween61cmand66cm
be incorporated into the system. above the center line of the pump when the test system is fully
6.1.13 Acheck should be made to ensure that the flush and charged with 19L of test fluid (Dimension A, Fig. 1).
test fluid are not incompatible with hoses, seals, or any other 6.2.4.1 The reservoir should be mounted so that it can be
materials in the system. cleaned and filled with ease and the contents may be readily
inspected by removal of the reservoir lid.
NOTE 4—The use of galvanized iron, non-anodized aluminum, zinc,
6.2.5 The inlet line (from the reservoir to the pump intake)
and cadmium should be avoided because of their high potential for
shallhaveaninternaldiameterofatleast25mmandshallhave
corrosion in the presence of many non-petroleum hydraulic fluids.
a straight horizontal run of at least 15cm to where it connects
6.1.14 Flexible Motor Coupling, (Item 4, Fig. 1), with a
to the pump inlet port (Dimension B, Fig. 1). If a hose is used,
minimum torque rating of 80N·m.
it shall be rated for vacuum service. The B1 pump uses dual
6.2 The various components of the test system shall be
inlet hoses with an internal diameter of 22mm.
placed in the system as indicated in Fig. 1.
NOTE 5—Some users have found the addition of a compound pressure
6.2.1 The test system shall be arranged and provided with
gage near the pump inlet port to be a useful diagnostic tool (Item 17, Fig.
necessary drain valves (Item 14, Fig. 1) so that complete
1). However, exercise care to ensure that any ports added to the inlet line
draining is possible with no fluid trap areas.
do not become air ingestment points.
6.2.2 Goodhydraulicspipingpracticesshouldbeusedwhen
NOTE 6—The use of a solenoid valve, finger screen or other device
constructing the test system to avoid air ingestment points and which restricts pump inlet flow is discouraged. Inlet restrictions adversely
affect pump performance.
flow restrictions.
NOTE7—Whentubingisusedforthepumpinletline,someusersprefer
6.2.3 The pump should be mounted so that its internal
to use a radius bend instead of an elbow near the pump inlet. If used, the
surfaces can easily be inspected and cleaned, alignment can be
straight run described in 6.2.5 shall be measured between the end of the
checked, and the operator has comfortable access when torqu-
bend and the pump inlet port. For optimal flow properties with 25mm
ing the head. tubing, a 100mm bend radius is recommended.
D7043 − 21
6.2.6 Thehighpressuredischargeline(fromthepumptothe seals be replaced following a solvent flush. All SAE O-ring
pressure control valve) shall be rated for 14MPa (2000psi) sealsshouldbereplacedifthefittinghasbeenremovedfromits
duty and have a minimum internal diameter of 15mm.The B1 mating port.
pump uses dual discharge hoses with an internal diameter of
8.2.1 Avarietyofsealcompoundsisavailableforthepump.
10.4mm.
It is the responsibility of the user to determine the best seal
6.2.7 The fluid return line and fittings (from the pressure composition to use with any given fluid. If possible, check the
control valve to the filter, flow counter, heat exchanger, and cure date of the seal.
reservoir) shall be rated for 3MPa duty and have a minimum
8.3 Inspect the pump body and head.
internal diameter of 15mm.
8.3.1 Visuallyexaminethepumpheadandtheinteriorofthe
pump body (Items 1, 10, Fig. 2). Replace if evidence of
NOTE 8—Some users find the addition of a shut off valve on the return
line (Item 16, Fig. 1) to be a useful addition to the piping since it allows
deterioration is observed.
filter changes and other system maintenance to be performed without
8.3.2 When the pump has been disassembled for seal and
draining the reservoir.
bearing replacement, carefully inspect the faces of the pump
6.2.7.1 (Warning—If a shut-off valve is installed in the
body and head which seal against the bushing faces (Surfaces
fluid return line, the user shall take procedural steps to ensure
A and B, Fig. 3) for high spots, warped condition, or other
that this valve has been opened before the pump is started. If
damage which may interfere with a good fluid seal. Discard
the valve is not opened, low-pressure system components will
any unsuitable components.
rupture, possibly endangering personnel.)
8.3.3 Check that the head bearing (Item 3, Fig. 2) is a press
fit into the head. If it is loose, discard the head.
NOTE 9—Some users find the addition of a valve on the pump inlet line
(Item 15, Fig. 1) to be a useful addition to the piping since it allows filter 8.3.4 Check that the shaft bearing (Item 11, Fig. 2) makes a
changes and other system maintenance to be performed without draining
close slip fit into the body. If it is loose, discard the body.
the reservoir. A full flow type of valve with an orifice of at least 25mm
(1in.) is recommended. NOTE 10—In some cases in which operational problems continue
without apparent cause, a change of pump body, head, shaft, or all three,
6.2.7.2 (Warning—If a shut-off valve is installed in the
has been known to alleviate the problem.
pump inlet line, the user shall take procedural steps to ensure
8.4 Inspect the shaft (Item 2, Fig. 2).
that this valve has been opened before the pump is started. If
8.4.1 Discard shafts if the rotor has worn deep marks in the
the valve is not opened, the pump will cavitate.)
splinesoriftheshaftsealhaswornagrooveontotheshaftseal
6.2.8 The case drain hose for the B1 pump (Item 19, Fig. 1)
surface. If the pump has been subjected to sudden seizure
shall be rated for 3 MPa duty and have a minimum internal
discard the shaft if it has become twisted due to the seizure.
diameter of 8mm. The B1 case drain must connect to the
Discard the shaft if there has been a rotor failure or severe
returnlinesothatthedrainflowisunrestrictedwhenthepump
overheating of the pump or if the keyway has been badly
is in operation.
damaged.
7. Reagents and Materials
8.5 Check alignment of the pump and motor shafts. Maxi-
mum values of 0.08mm parallel misalignment and 0.3° angu-
7.1 Warning—Use adequate safety provisions with all
lar misalignment are suggested limits.
solvents.
8.5.1 Alignment checks should be made with the head,
7.2 Aliphatic Naphtha, Stoddard Solvent, or equivalent is
shaft, and both bearings in place and with the head tightened
satisfactory. (Warning—Combustible. Vapor harmful.)
down.
8.5.2 Using a test indicator, with the head, shaft, and both
7.3 Precipitation Naphtha (Warning—Extremely flam-
bearingsinplaceandwiththeheadtighteneddown,inspectthe
mable. Harmful if inhaled. Vapors can cause flash fire.)
shaft for a bent condition by rotating it by hand with the motor
7.4 Isopropanol (Warning—flammable.).
coupling removed.
7.5 Warning—In instances when the solvents listed in
8.6 Periodically use a ⁄8-16(inch) tap to clean the eight
Section 7 are not effective, alternative solvents may be used. It
tapped holes that receive the pump head bolts. Use a metal
is the responsibility of the user to determine the suitability of
brush to clean the threads of the head bolts themselves (Item
alternative solvents and any hazards associated with their use.
17, Fig. 2). The threads may be coated with a light oil to
prevent corrosion. To ensure even torquing of the cartridge,
8. Test Stand Maintenance
housings or head bolts with damaged threads should be
discarded.
8.1 Sensors and shut-off switches should be checked peri-
odically for proper calibration and operation in accordance
8.7 Periodic disassembly of the relief valve (Item 8, Fig. 1)
with good engineering practice as determined by the user.
for cleaning and inspection is recommended. (Warning—
Improper reassembly of the relief valve may pose a hazard to
8.2 It is recommended that the pump shaft (Item 2, Fig. 2),
the user.)
seals(Items5,7,12,15,Fig.2),andbearings(Items3,11,Fig.
2) be replaced after every five runs (or sooner if high weight 8.7.1 If the relief valve fails to produce system pressure
loss, vibration, cavitation, rotor failure, shaft seizure, or visual check that the weep hole across the faces of the 343154 piston
deterioration is encountered). It is also recommended that all is not blocked.
D7043 − 21
NOTE 1—Shaft, rotor, vanes and seals not shown.
FIG. 3 Pump Housing
8.7.2 If the #262332 O-ring is damaged it may allow air to 10.2 Flushing procedure for petroleum and synthetic fluids:
be drawn into the low pressure region behind the #290057
NOTE 11—This flushing sequence is not adequate when changing fluid
Piston.
types such as from glycol to phosphate ester, oil to glycol, and so forth
(see 7.5).
9. Sampling
10.2.1 Drain all old fluid from the system, remove used test
9.1 Thesampleoffluidshallbethoroughlyrepresentativeof
cartridge (if present). Wipe out pump and filter housings and
the material in question, and the portion used for the test shall
the reservoir and baffle.
be thoroughly representative of the sample itself.
10.2.2 Install a flush cartridge (any good, previously used
10. Flushing
cartridge).
10.1 Proper cleaning and flushing of the entire system is 10.2.3 Close all drain valves and torque the pump head.
extremely important to prevent cross-contamination of test Open the pump inlet and return line valves if used (see Notes
fluids. 8 and 9).
D7043 − 21
NOTE 14—Hoses that have been previously used with mineral oils,
10.2.4 Charge the system with 7.6L of flushing fluid. For
phosphate esters, polyol esters, or PAO fluids should not be used with
petroleum and synthetic fluids use either Stoddard solvent
water glycols.
(Warning—see 7.2) or base stock depending on the similarity
of the old and new test fluids.
11. Preparation of Test Cartridge
NOTE 12—One flush of this petroleum solvent is usually sufficient to
11.1 Fig. 6 shows the various components of the test
clean a system in which an oil was run. Other solvents can be used when
cartridge.
oxidized oil has coated the reservoir and lines (Warning—see 7.5).
Repeat the flush if the first flush is cloudy or opaque.
11.2 Inspect all cartridge components for manufacturing or
10.2.5 Reduce the setting of the pressure control valve so
materialirregularities.Useanewringandsetofvanesforeach
that pressure will not be generated when flow starts. test. Reuse of the rotor, alignment pin, and bushings is
10.2.6 Jog the pump drive motor ON and OFF switches to
permissible if they are in satisfactory condition.
remove the air from the test system. Continue until the fluid
11.3 It is essential that the user is familiar with precision
returning to the reservoir is visually free of air.
inspection practices, has quality instruments, and is adept in
10.2.7 Flush for 30min at 0.7MPa and 38°C to 49°C.
their use.
10.2.8 Drain system, remove filter element, and flush car-
11.4 Rotor Selection and Preparation:
tridge.Wipeoutpumpandfilterhousingsandthereservoirand
11.4.1 Between tests it is important to ensure that the rotor
baffle.
faces, journals, and slots are free of any varnish or other
10.2.9 Reinstall used filter element and flush cartridge,
buildup that may inhibit free movement of the vanes, cause
torque pump head, reduce setting o
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7043 − 17 D7043 − 21
Standard Test Method for
Indicating Wear Characteristics of Non-Petroleum and
Petroleum Hydraulic Fluids in a Constant Volume Vane
Pump
This standard is issued under the fixed designation D7043; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers a constant volume vane pump test procedure operated at 1200 r ⁄min and 13.8 MPa.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1 Exception—There are no SI equivalents for the inch fasteners and inch O-rings that are used in the apparatus in this test
method.
1.2.2 Exception—In some cases English pressure values are given in parentheses as a safety measure.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D2882 Test Method for Indicating Wear Characteristics of Petroleum and Non-Petroleum Hydraulic Fluids in Constant Volume
Vane Pump (Withdrawn 2003)
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products, Liquid Fuels, and
Lubricants
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.N0 on Hydraulic Fluids.
Current edition approved July 1, 2017Dec. 1, 2021. Published July 2017December 2021. Originally approved in 2004. Last previous edition approved in 20122017 as
D7043 – 12.D7043 – 17. DOI: 10.1520/D7043-17.10.1520/D7043-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D7043 − 21
3.1.1 flushing, v—process of cleaning the test system before testing to prevent cross-contamination.
3.1.2 snubber, n—fluid restricting device used to dampen pressure pulsations.
3.1.3 torquing, v—process of tightening the pump head bolts to achieve a uniform clamping force.
4. Summary of Test Method
4.1 An amount of 18.9 L 6 0.5 L of a hydraulic fluid are circulated through a rotary vane pump system for 100 h at a pump speed
of 1200 r ⁄min 6 60 r ⁄min and a pump outlet pressure of 13.8 MPa 6 0.3 MPa (2000 psi 6 40 psi). Fluid temperature at the pump
inlet is 66 °C 6 3 °C for all water glycols, emulsions, and other water containing fluids and for petroleum and synthetic fluids of
ISO Grade 46 or lighter. lower viscosity. A temperature of 80 °C 6 3 °C is used for all other synthetic and petroleum fluids.
4.2 The result obtained is the total mass loss from the cam ring and the twelve vanes during the test. Other reported values are
initial flow rate and final flow rate.
4.3 The total quantity of test oilfluid required for a run is 26.5 L.
5. Significance and Use
5.1 This test method is an indicator of the wear characteristics of non-petroleum and petroleum hydraulic fluids operating in a
constant volume vane pump. Excessive wear in vane pumps could lead to malfunction of hydraulic systems in critical applications.
6. Apparatus
6.1 The basic system consists of the following (see Fig. 1):
6.1.1 AC Motor, 1200 r ⁄min, or other suitable drive, with 11 kW (15 hp) as suggested minimum power requirement (Item 5, Fig.
1). The motor must have right hand rotation (counterclockwise rotation as viewed from the shaft end).
6.1.1.1 When constructing the test stand some users build the test stand using a variable speed motor so that other, similar tests
such as ISO 20763 (1440 rpm) may be performed using the same apparatus.
6.1.2 Test Stand Base, with appropriate, rigid mounting for the motor, pump, reservoir, and other components.
6.1.3 Rotary Vane Pump, replaceable cartridge type. A Vickers V104C or V105C or Conestoga USA B1 housing is used along with
internal components from Conestoga USA, Inc. Vickers housings V104C and V105C are acceptable for use in this test when used
with Cam Rings and Vanes from Conestoga USA, Inc. Refer to D7043 – 17 for Vickers assembly part numbers and advisories
concerning their use. The assembly should produce 28.4 L ⁄min flow at 1200 r ⁄min with ISO Grade 32 fluid at 49 °C, at 6.9 MPa
(Item 3, Fig. 1; Fig. 2; Fig. 3). (Warning—Eaton-Vickers test pump is rated at 6.9 MPa (1000 psi) but is being operated at 13.8
MPa (2000 psi). A protective shield around the pump is recommended.)
NOTE 1—This test method has been written for the use of Conestoga USA Inc. internals along with an Eaton-Vickers or Conestoga USA housing and head.
If components from other manufacturers are used, refer to Test Method D2882 – 00 for preparation and selection guidelines.
6.1.3.1 The replaceable cartridge consists of the cam ring, the rotor, two bushings, a set of twelve vanes, and an alignment pin.
6.1.3.2 The individual cartridge parts are purchased separately. Conestoga USA, Inc. part numbers for these items are: cam ring
No. 2882-5, alignment pin No. 2882-10, rotor No. 2882-1C,2882-1D, bronze bushings No. 2882-4C and 2882-4E, and vane kit
(12 vanes) No. 2882-V12. 2882-V12A. Alternate bushings with a TiN coating are available (part No. 2882-4F and 2882-4G) for
use where bushing wear has been a problem.
The sole source of supply of the apparatus known to the committee at this time is Conestoga USA Inc., P.O. Box 3052, Pottstown, PA 19464. If you are aware of
alternative suppliers, please provide this information to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible
technical committee, which you may attend.
D7043 − 21
Item Description (Required if otherwise noted)
1. Reservoir
2. Inlet temperature sensor
2. Inlet Temperature Sensor
3. Conestoga B1 Pump
4. Flexible coupling
4. Flexible Coupling
5. Motor
6. High pressure gauge
6. High Pressure Gauge/Sensor
7. Snubber valve
7. Pulsation Dampening Valve
8. Relief valve
9. Filter
9. Filter, β = 100 Minimum Performance
3μ
10. Heat exchanger
10. Heat Exchanger
11. Temperature control valve
11. Temperature Control Valve
12. Flow meter
12. Flow Meter
13. Low pressure gauge
13. Low Pressure Gauge/ Filter Indicator
14. Fluid sampling port
14. Drains
15. Pump inlet valve
15. Pump Inlet Valve (Not required)
16. Return line valve
16. Return Line Valve (Not required)
17. Inlet vacuum gauge
17. Inlet Vacuum Gauge/Sensor (Not required)
18. Outlet temperature sensor
18. Outlet Temperature Sensor (Not required)
19. Case drain for B1 pump
19. Case Drain for B1 pump
A. 61 to 66 cm, vertical
A. 61 to 66 cm, Vertical
B. 15.2 cm, minimum horizontal
B. 15 cm, Minimum Horizontal
C. 10.2 cm, maximum
C. 15 cm, Minimum Vertical
FIG. 1 System Schematic
D7043 − 21
FIG. 32 Conestoga USA, Inc., B1 Pump Assembly
6.1.3.3 There are to be no modifications to the pump housing such as plugging the drain hole in the pump body or drilling and
tapping a hole in the head for an external drain.
6.1.4 Reservoir, (Item 1, Fig. 1).
6.1.4.1 The reservoir shall be equipped with a removable baffle and a close fitting lid, all of stainless steel construction. The
reservoir can be square or rectangular (with a flat bottom) or cylindrical (with a spherical or cone shaped bottom) and must be
designed so as to avoid air entrainment in the fluid.
NOTE 1—A suitable reservoir design is presented in Test Method D2882 – 00.
6.1.4.2 To promote deaeration and thermal mixing of the fluid, the baffle shall be designed so that returning fluid will follow an
indirect path from the return port to the outlet port.
6.1.4.3 To avoid air entrainment, the reservoir shall be designed so that the return line enters well below the fluid level, fluid flow
does not cascade over the baffle, and there will be a minimum of 15 cm of fluid depth above the pump inlet line.reservoir outlet
Dimension C, Fig. 1).
6.1.4.4 Fluid ports may be added as required by the user for the installation of a low level switch, reservoir temperature sensor,
bottom drain, and so forth.
D7043 − 21
6.1.4.5 If the reservoir is positioned so that the contents cannot be visually checked for aeration by removing the lid, a fluid-tight
glass viewing port may be located in the side of the reservoir.
6.1.4.6 In the reservoir return line the drop tube end may be cut at a 45° angle for better return flow characteristics.
6.1.5 Outlet Pressure Control Valve, Eaton-Vickers pressure relief valve (CT-06-C/3.4 to 13.8 MPa) (CT-06F or CS-06F, to
10.3 MPa to 20.7 MPa) with either manual or remote control (Item 8, Fig. 1).
6.1.6 Temperature Control Device, suitable for controlling coolant flow to the heat exchanger to maintain test fluid at the specified
temperature (Item 11, Fig. 1).
6.1.7 Temperature Indicator, (Item 2, Fig. 1) shall have an accuracy of 61 °C and shall have an appropriate sensor to monitor
pump inlet temperature.
6.1.7.1 To prevent a flow restriction near the pump inlet port, the temperature probe shall have a diameter of not more than 6
mm.3.2 mm.
6.1.7.2 The test fluid temperature shall be measured within 10.2 cm of the pump inlet (Dimension C, using the B1 pump sensor
port. Fig. 1). The sensing probe shall be inserted into the midpoint of flow.
NOTE 2—Some users have found the addition of a pump outlet temperature sensor to be a useful diagnostic tool. If used, it shall be suitable for 13.8 MPa
duty and should be placed in the high pressure line between the pump and the relief valve (Item 18, Fig. 1).
6.1.8 Heat Exchanger, (Item 10, Fig. 1). The heat exchanger should be of adequate size and design to remove the excess heat from
the test system when using the available coolant supply.
NOTE 3—It is suggested that a shell-and-tube-type heat exchanger, if used, should be connected in reverse (the hydraulic fluid is passed through the tubes
and not around them) so that the interior of the heat exchanger can be effectively cleaned between tests.
6.1.9 Pressure Indicator, (Item 6, Fig. 1) to measure pump discharge pressure shall have an accuracy of at least 60.3 MPa at
13.8 MPa. The gauge shall be suitable for 13.8 MPa duty.
6.1.9.1 The pressure indicator should be snubbed (Item 7, Fig. 1) to prevent damage or inaccurate readings from pulsations or
sudden fluctuations of system pressure.
6.1.10 Filter Unit (Item 9, Fig. 1), 3 μm (minimum Beta 3 ratio of 100) replaceable fiberglass element with housing. Two new filter
elements are a replacable element or spin-on type filter, having a fiberglass element, are both acceptable. The element shall have
a minimum Beta Ratio of 100 for 3 μm size particles (β3 = 100, Filtration Efficiency = 99.0 %). One new filter element is required
for each test.
6.1.10.1 The filter housing shall be non-bypassing and shall be provided with duala pressure gaugesgauge (Item 13, Fig. 1) or
another suitable indicator to monitor pressure across the filter to warn of impending collapse of the element.
6.1.10.2 If dual pressure gauges are used to monitor filter pressure, the The rated collapse pressure of the filter element should be
known. The collapse pressure should be within the range of the gage.gauge.
6.1.11 Flow Measuring Device, (Item 12, Fig. 1) with an accuracy of at least 60.4 L ⁄min.
6.1.12 While not required, it is suggested that low-level, high-pressure, high-temperature, and low-flow safety switches be
incorporated into the system.
6.1.13 A check should be made to ensure that the flush and test fluid are not incompatible with hoses, seals, or any other materials
in the system.
Request Vickers publication I-3369-S for the relief valve service data. See http://hydraulics.eaton.com/products/vickers.html.
D7043 − 21
NOTE 4—The use of galvanized iron, non-anodized aluminum, zinc, and cadmium should be avoided because of their high potential for corrosion in the
presence of many non-petroleum hydraulic fluids.
6.1.14 Flexible Motor Coupling, (Item 4, Fig. 1).), with a minimum torque rating of 80 N·m.
6.2 The various components of the test system shall be placed in the system as indicated in Fig. 1.
6.2.1 The test system shall be arranged and provided with necessary drain valves (Item 14, Fig. 1) so that complete draining is
possible with no fluid trap areas.
6.2.2 Good hydraulics piping practices should be used when constructing the test system to avoid air ingestment points and flow
restrictions.
6.2.3 The pump should be mounted so that its internal surfaces can easily be inspected and cleaned, alignment can be checked,
and the operator has comfortable access when torquing the head.
6.2.4 The reservoir shall be located above the pump so that the fluid level in the reservoir will be between 61 cm and 66 cm above
the center line of the pump when the test system is fully charged with 19 L of test fluid (Dimension A, Fig. 1).
6.2.4.1 The reservoir should be mounted so that it can be cleaned and filled with ease and the contents may be readily inspected
by removal of the reservoir lid.
6.2.5 The inlet line (from the reservoir to the pump intake) shall have an internal diameter of at least 25 mm and shall have a
straight horizontal run of at least 15 cm to where it connects to the pump inlet port (Dimension B, Fig. 1). If a hose is used, it shall
be rated for vacuum service. The B1 pump uses dual inlet hoses with an internal diameter of 22 mm.
NOTE 5—Some users have found the addition of a compound pressure gage near the pump inlet port to be a useful diagnostic tool (Item 17, Fig. 1).
However, exercise care to ensure that any ports added to the inlet line do not become air ingestment points.
NOTE 6—The use of a solenoid valve, finger screen or other device which restricts pump inlet flow is discouraged. Inlet restrictions adversely affect pump
performance.
NOTE 7—When tubing is used for the pump inlet line, some users prefer to use a radius bend instead of an elbow near the pump inlet. If used, the straight
run described in 6.2.5 shall be measured between the end of the bend and the pump inlet port. For optimal flow properties with 25 mm tubing, a 100 mm
(4 in.) bend radius is recommended.
6.2.6 The high pressure discharge line (from the pump to the pressure control valve) shall be rated for 14 MPa (2000 psi) duty
and have a minimum internal diameter of 15 mm. The B1 pump uses dual discharge hoses with an internal diameter of 10.4 mm.
6.2.7 The fluid return line and fittings (from the pressure control valve to the filter, flow counter, heat exchanger, and reservoir)
shall be rated for 3 MPa duty and have a minimum internal diameter of 15 mm.
NOTE 8—Some users find the addition of a shut off valve on the return line (Item 16, Fig. 1) to be a useful addition to the piping since it allows filter
changes and other system maintenance to be performed without draining the reservoir.
6.2.7.1 (Warning—If a shut-off valve is installed in the fluid return line, the user shall take procedural steps to ensure that this
valve has been opened before the pump is started. If the valve is not opened, low-pressure system components will rupture,
possibly endangering personnel.)
NOTE 9—Some users find the addition of a valve on the pump inlet line (Item 15, Fig. 1) to be a useful addition to the piping since it allows filter changes
and other system maintenance to be performed without draining the reservoir. A full flow type of valve with an orifice of at least 25 mm (1 in.) is
recommended.
6.2.7.2 (Warning—If a shut-off valve is installed in the pump inlet line, the user shall take procedural steps to ensure that this
valve has been opened before the pump is started. If the valve is not opened, the pump will cavitate.)
6.2.8 The case drain hose for the B1 pump (Item 19, Fig. 1) shall be rated for 3 MPa duty and have a minimum internal diameter
of 8 mm. The B1 case drain must connect to the return line so that the drain flow is unrestricted when the pump is in operation.
D7043 − 21
7. Reagents and Materials
7.1 Warning—Use adequate safety provisions with all solvents.
7.2 Aliphatic Naphtha, Stoddard Solvent, or equivalent is satisfactory. (Warning—Combustible. Vapor harmful.)
7.3 Precipitation Naphtha (Warning—Extremely flammable. Harmful if inhaled. Vapors can cause flash fire.)
7.4 Isopropanol (Warning—flammable.).
7.5 Warning—In instances when the solvents listed in Section 7 are not effective, alternative solvents may be used. It is the
responsibility of the user to determine the suitability of alternative solvents and any hazards associated with their use.
8. Test Stand Maintenance
8.1 Sensors and shut-off switches should be checked periodically for proper calibration and operation in accordance with good
engineering practice as determined by the user.
8.2 It is recommended that the pump shaft (Item 17, Fig. 2; Item 2, Fig. 32), seals (Items 4, 15, 16, Fig. 2; Items 5, 7, 12, 15, Fig.
32), and bearings (Items 2, 13, Fig. 2; Items 3, 11, Fig. 32) be replaced after every five runs (or sooner if high weight loss, vibration,
cavitation, rotor failure, shaft seizure, or visual deterioration is encountered). It is also recommended that all seals be replaced
following a solvent flush. All SAE O-ring seals should be replaced if the fitting has been removed from its mating port.
8.2.1 A variety of seal compounds is available for the pump. It is the responsibility of the user to determine the best seal
composition to use with any given fluid. If possible, check the cure date of the seal.
8.3 Inspect the pump body and head.
8.3.1 Visually examine the pump head and the interior of the pump body (Items 3 and 11, Fig. 2; Items 1, 10, Fig. 32). Replace
if evidence of deterioration is observed.
8.3.2 When the pump has been disassembled for seal and bearing replacement, carefully inspect the faces of the pump body and
head which seal against the bushing faces (Surfaces A and B, Fig. 43) for high spots, warped condition, or other damage which
may interfere with a good fluid seal. Discard any unsuitable components.
8.3.3 Check that the Eaton-Vickers head bearing (Item 2,3, Fig. 2) is a press fit into the head. If it is loose, discard the head. The
B1 head bearing (Item 3, Fig. 3) should be a close slip fit to the head.
8.3.4 Check that the shaft bearing (Item 13, Fig. 2; Item 11, Fig. 32) makes a close slip fit into the body. If it is loose, discard
the body.
8.3.5 Check that the bore for the cartridge (Diameter E, Fig. 4) is not greater than 76.23 mm.
8.3.5.1 If the bore is oversized, the ring may crack when the pump is pressurized.
8.3.5.2 If the bore is oversized, a piece of 0.025 mm shim stock trimmed to 20 mm by 235 mm can be wrapped around the ring
to pack out the excess clearance. Installation of the shim requires that the cartridge assembly be made in the pump housing and
that the housing bore and ring outside diameter are clean and dry.
8.3.6 Check that the pump body ports align properly with the bushing ports, with no overlapping, which might restrict fluid flow.
NOTE 10—In some cases in which operational problems continue without apparent cause, a change of pump body or body, head, shaft, or both, all three,
has been known to alleviate the problem.
8.4 Inspect the shaft (Item 17, Fig. 2; Item 2, Fig. 32; Fig. 5).
D7043 − 21
NOTE 1—Shaft, rotor, vanes and seals not shown.
FIG. 43 Pump Housing
8.4.1 Check that the splines of a new shaft are smoothly cut, have consistent width from the outer diameter to the root, and are
parallel with the axis of the shaft. Avoid reusing shafts if the rotor has worn deep marks in the splines (Items 1, 2, 3, and 4,Discard
shafts if the rotor has worn deep marks in the splines or if the shaft seal has worn a groove onto the shaft seal surface. If the pump
has been subjected to sudden seizure discard the shaft if it has become twisted due to the seizure. Discard the Fig. 5).shaft if there
has been a rotor failure or severe overheating of the pump or if the keyway has been badly damaged.
8.4.2 Check new shafts and used shafts that have been subjected to pump failure or overheating for bending, twisting, or damage
to the key seat or splines (Items 5 and 7, Fig. 5).
8.4.3 Check the surface where the shaft seal rides for conditions that may cause the seal to leak (Item 6, Fig. 5).
D7043 − 21
8.5 Check alignment of the pump and motor shafts. Maximum values of 0.08-mm0.08 mm parallel misalignment and 0.3° angular
misalignment are suggested limits.
8.5.1 Alignment checks should be made with a torqued cartridge in place. the head, shaft, and both bearings in place and with the
head tightened down.
8.5.2 Using a test indicator, with the head, shaft, and both bearings in place and with the head tightened down, inspect the shaft
for a bent condition by rotating it by hand with the motor coupling removed (Item 7, removed. Fig. 5).
8.5.3 Precision ground coupling halves that have identical outside diameters and run true to the shaft with which they are used
(pump or motor) will permit the use of a straight edge and feeler gages to achieve close alignment of the pump and motor shafts.
8.6 Periodically use a ⁄8-16 (inch) tap to clean the eight tapped holes that receive the pump head bolts and bolts. Use a metal brush
to clean the threads of the head bolts themselves (Item 1, Fig. 2; Item 17, Fig. 32). The threads may be coated with a light oil to
prevent corrosion. To ensure even torquing of the cartridge, housings or head bolts with damaged threads should be discarded.
8.7 Periodic disassembly of the relief valve (Item 8, Fig. 1) for cleaning and inspection is recommended. (Warning—Improper
reassembly of the relief valve may pose a hazard to the user.)
8.7.1 If the relief valve fails to produce system pressure check that the weep hole across the faces of the 343154 piston is not
blocked.
8.7.2 If the #262332 O-ring is damaged it may allow air to be drawn into the low pressure region behind the #290057 Piston.
9. Sampling
9.1 The sample of fluid shall be thoroughly representative of the material in question, and the portion used for the test shall be
thoroughly representative of the sample itself.
10. Flushing
10.1 Proper cleaning and flushing of the entire system is extremely important to prevent cross-contamination of test fluids.
10.2 Flushing procedure for petroleum and synthetic fluids:
NOTE 11—This flushing sequence is not adequate when changing fluid types such as from glycol to phosphate ester, oil to glycol, and so forth (see 7.5).
10.2.1 Drain all old fluid from the system, remove used test cartridge (if present), remove, and discard old filter. present). Wipe
out pump and filter housings and the reservoir and baffle.
10.2.2 Install a flush cartridge (any good, previously used cartridge) and a new filter.cartridge).
10.2.3 Close all drain valves and torque the pump head. Open the pump inlet and return line valves if used (see Notes 98 and 109).
10.2.4 Charge the system with 7.6 L of flushing fluid. For petroleum and synthetic fluids use either Stoddard solvent
(Warning—see 7.2) or base stock depending on the similarity of the old and new test fluids.
NOTE 12—One flush of this petroleum solvent is usually sufficient to clean a system in which an oil was run. Other solvents can be used when oxidized
oil has coated the reservoir and lines (Warning—see 7.5). Repeat the flush if the first flush is cloudy or opaque.
10.2.5 Reduce the setting of the pressure control valve so that pressure will not be generated when flow starts.
10.2.6 Jog the pump drive motor ON and OFF switches to remove the air from the test system. Continue until the fluid returning
to the reservoir is visually free of air.
D7043 − 21
10.2.7 Flush for 30 min at 0.7 MPa and 38 °C to 49 °C.
10.2.8 Drain system, remove filter element, and flush cartridge. Wipe out pump and filter housings and the reservoir and baffle.
10.2.9 Reinstall used filter element and flush cartridge, torque pump head, reduce setting of pressure control valve, close all drain
valves, and open pump inlet and return line valves.
10.2.10 Recharge system with 7.6 L of test fluid.
10.2.11 Jog the pump drive motor ON and OFF switches to remove the air from the test system. Continue until the fluid returning
to
...