Bench Test Procedure for Hydraulic Piston Pumps {5070} Caterpillar

Asphalt Compactor

CB46B (S/N: JC41-UP)

CB64B (S/N: C561-UP; 4771-UP)

CB66B (S/N: 4751-UP; B661-UP)

CB68B (S/N: 4961-UP; C681-UP)

CCS9 (S/N: C521-UP)

CD10 (S/N: J6B1-UP)

Asphalt Paver

AP1000E (S/N: T1F1-UP)

AP1055E (S/N: TJF1-UP)

AP255E (S/N: D8A1-UP)

BG1000E (S/N: RTT1-UP)

BG1055E (S/N: FRR1-UP)

Cold Planer

PM310 (S/N: RH81-UP; NM91-UP)

PM312 (S/N: LJ91-UP; NJX1-UP)

PM313 (S/N: J631-UP; JHZ1-UP)

Engine

3512C (S/N: ELJ1-UP)

Paving Compactor

CB10 (S/N: MS21-UP; 5B41-UP; NPP1-UP; P8P1-UP)

CB7 (S/N: G441-UP; AT51-UP; NLJ1-UP)

CP-533D (S/N: AFC1-UP; 6AZ1-UP)

CP-563C (S/N: 5JN1-UP; 5KN1-UP)

CP-563D (S/N: 9ZW1-UP; 5LZ1-UP)

CS-533D (S/N: AET1-UP; 5CZ1-UP)

CS-563C (S/N: 4KN1-UP; 4LN1-UP)

CS-563D (S/N: 9MW1-UP; 1SZ1-UP; 2RZ1-UP)

Reclaimer Mixer

RM500B (S/N: MB91-UP; TAS1-UP)

Vibratory Asphalt Compactor

CB44B (S/N: JXL1-UP)

CB54B (S/N: LXD1-UP; RJN1-UP; S4P1-UP)

CB8 (S/N: JL41-UP; CB81-UP)

CCS7 (S/N: 4B21-UP)

CD44B (S/N: 3981-UP; JXE1-UP)

CD54B (S/N: GRT1-UP; J9T1-UP)

CD8 (S/N: RH41-UP)

Vibratory Soil Compactor

CP-563E (S/N: CNT1-UP)

CP44B (S/N: 4P41-UP; GNB1-UP)

CP54 (S/N: C5Y1-UP)

CP54B (S/N: 4831-UP; P541-UP; GP51-UP; PM51-UP; 5061-UP; 5461-UP; P5F1-UP; PFM1-UP; CPX1-UP)

CP56 (S/N: C5P1-UP; FCP1-UP)

CP56B (S/N: 4851-UP; MP61-UP; P561-UP; 4381-UP; 5081-UP; LHC1-UP; M5P1-UP)

CP64 (S/N: P7F1-UP; C6P1-UP)

CP68B (S/N: 5101-UP; 6841-UP; CM61-UP; P681-UP; 4891-UP; LCF1-UP; SDT1-UP)

CP74 (S/N: P8F1-UP)

CS-563E (S/N: ASA1-UP; CNG1-UP; MCP1-UP)

CS44B (S/N: CS31-UP; 4G31-UP; RGE1-UP)

CS54 (S/N: C5R1-UP; C5W1-UP)

CS54B (S/N: 4821-UP; 5M41-UP; 5441-UP; CS51-UP; 5051-UP; M5B1-UP; P5B1-UP; MFC1-UP; L4H1-UP)

CS56 (S/N: C5S1-UP; FCS1-UP)

CS56B (S/N: M561-UP; S561-UP; 4371-UP; L8H1-UP; M4M1-UP)

CS64 (S/N: C7F1-UP; C6S1-UP)

CS64B (S/N: C641-UP; CW61-UP; DH61-UP; 4861-UP; S4B1-UP)

CS66B (S/N: CS61-UP; S661-UP; 4871-UP)

CS68B (S/N: CS81-UP; M681-UP; 4881-UP; 4391-UP; 5091-UP; MBF1-UP; MMS1-UP)

CS74 (S/N: C8F1-UP; C8S1-UP)

Introduction

Table 1

Revision	Summary of Changes in REHS3457
26	Updated effectivity and added new part number 577-8671 Piston Pump Gp to the document and reformatted the tables.
25	Updated effectivity.
24	Updated effectivity.
23	Added new Vibratory Soil Compactor serial number prefixes 4G3, GNB, and RGE to document.

© 2019 Caterpillar All Rights Reserved. This guideline is for the use of Cat dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law. Information contained in this document is considered Caterpillar: Confidential Yellow.

This Special Instruction includes test procedures for piston pumps. This Special Instruction also provides specifications. The technician should have a good understanding of hydraulic piston pumps. The technician should be educated in the operation of the hydraulic test bench. The test benches in this document are available through the Caterpillar Service Tool Division. Gather all necessary tooling before you need to hook up the pump. Some of the required tooling appears in a table at the end of this document. There are many possible variations of tooling that could be used. Not every possible variation can be listed.

For technical questions when using this document, work with your Dealer Technical Communicator (TC).

To report suspected errors, inaccuracies, or suggestions regarding the document, submit a form for feedback in the Service Information System (SIS Web) interface.

Canceled Part Numbers and Replaced Part Numbers

This document may not include all Canceled part numbers and replaced part numbers. Use NPR on SIS for information about Canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.

Safety

Illustration 1	g02139237

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Personal injury or death can result from improperly checking for a leak. Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.

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Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

Show/hide table

Pump test pressures in this guideline may exceed the normal operating range of the hydraulic test hoses utilized when connecting the tested pump to the test bench. However, the order of magnitude of these pressures is significantly below the burst strength of the Caterpillar "XT6" product. High pressure oil can escape through improperly assembled hoses and fittings. High pressure oil can also escape through poorly maintained hoses and fittings. High pressure oil may also leak through hose that has become damaged over the life of the hose due to the pressure levels that occur during test bench operation. Personal injury or death can result from improper hose & fitting inspection or improper hose replacement procedures. Escaping fluid under pressure can penetrate body tissue causing serious injury, and possible death. Thoroughly inspect all testing hoses, fittings, and quick disconnects prior to any testing operation. Check the assembly date tag or hose assembly log date for a hose life indicator. Replace all Test Bench hoses at a minimum of every 2 years or earlier if the hose or fittings appear to be damaged.

Summary

This procedure is specific to the type of pump and the type of control. Refer to the test specifications and the tooling at the end of this document.

Note: A paper copy of this document may not be the latest version. Go to the Service Information System (SIS) to view the latest version.

References

Table 2

References
Media Number	Title
REHS1761	"Required Tooling for Bench Testing Hydraulic Components"
SEBF8810	"Hydraulic Pump, Motor, and Cylinder Bench Test Procedure Reference Manual"
SEHS8892	"Operating Instructions for Caterpillar 1U-9400 Series Hydraulic Test Center"
NEHS0563	"Tool Operating Manual for 9U-5000 Series Hydraulic Test Bench"

Connections for the Caterpillar Hydraulic Test Center

Illustration 2	g01386298
Connections for the Test Center (1) Flow control for discharge (2) "F3" flow meter inlet (3) "F4" flow meter inlet (4) Oil supply from the auxiliary pump (5) "F3" inlet for the flow meter with flow limiter (6) "F3"outlet for the flow meter with pressure control (7) Load sensing pressure (8) Signal pressure (9) "F4" outlet for the flow meter (10) Return to tank (11) Connections for case drain (12) Oil supply

Illustration 3	g01386326
Control and Gauges for the Test Center (13) Meter for speed and torque (14) Gauge for signal pressure (15) Control for signal pressure (16) Pressure gauge for auxiliary pump (17) Auxiliary pump flow (18) "F3" discharge pressure gauge (19) "F3" discharge flow (20) "F4" discharge pressure gauge (21) "F4" discharge flow (22) Auxiliary pump flow control (23) "F3" margin pressure (24) "F3" Load control for discharge pressure (25) "F4" Load control for discharge pressure

Connections for the Caterpillar Hydraulic Test Bench

Illustration 4	g01386535
Connections for the Test Bench (26) "Flow meter 1" loop and "Flow meter 2" loop (27) Oil Supply

Illustration 5	g01386536
Connections for the Test Bench (28) "Flow meter 2" loop (29) "Flow meter 1" loop (30) "Flow meter 2" outlet (31) Signal pressure line (32) "Flow meter 2" inlet (33a) "Flow meter 1" outlet (33b) Auxiliary oil supply outlet (34) Auxiliary oil supply inlet (35) "Flow meter 1" inlet

Illustration 6	g01386537
Control and Gauges for the Test Bench (36) Auxiliary oil supply pressure (37) Signal pressure (38) Control for signal pressure (39) "Flow meter 1" discharge pressure (40) Control for auxiliary oil supply pressure (41) "Flow meter 2" discharge pressure (42) Auxiliary oil supply control (43) "Flow meter 2" discharge flow (44) Discharge flow for auxiliary pump (45) "Flow meter 1" discharge flow (46) "Flow meter 1" load control (47) Speed and direction control (48) "Flow meter 2" load control

Port Locations

Illustration 7	g02475290
Typical port locations and pump adjustments (49) Gauge port for stroking pressure (50) Connector for electrical solenoid (51) Adjustment screw for hydraulic zero (52) Charge oil supply port (53) Gauge port for discharge pressure (54) Gauge port for discharge pressure (55) Gauge port for charge pressure (56) Connector for electrical solenoid (57) Adjustment screw for mechanical zero (58) Adjustment screw for stroke limiter (59) Gauge port for stroking pressure (60) Vent port (61) Adjustment screw for stroke limiter (62) Case drain port (63) Discharge port (64) Discharge port

Illustration 8	g01388543
Hydraulic schematic (49) Gauge port for stroking pressure (52) Charge oil supply port (53) Gauge port for discharge pressure (54) Gauge port for discharge pressure (55) Gauge port for charge pressure (59) Gauge port for stroking pressure (62) Case drain port (63) Discharge port (64) Discharge port

Illustration 9	g02475036
Hydraulic schematic for 337-4017 (has high-pressure cut) (49) Gauge port for stroking pressure (53) Gauge port for discharge pressure (54) Gauge port for discharge pressure (55) Gauge port for charge pressure (59) Gauge port for stroking pressure (62) Case drain port (63) Discharge port (64) Discharge port

Illustration 10	g02727827

Illustration 11	g02727828

9U-5902 Rectifier Block

Illustration 12	g01386657
9U-5902 Rectifier Block connections

Illustration 13	g01386659
9U-5902 Rectifier Block schematic (65) High-pressure port (66) High-pressure outlet (67) High-pressure port (68) Low-pressure inlet

9U-5893 Heat Exchanger

Illustration 14	g01386660
9U-5893 Heat Exchanger connections (69) Inlet (70) Outlet (71) Water inlet (72) Water outlet

198-4240 Electric Pressure Gauge Group

Illustration 15	g01386666
198-4240 Electric Pressure Gauge Group Connections (73) Pressure Gauge (74) Red Transducer 34500 kPa (5000 psi) (75) Blue Transducer 3450 kPa (500 psi)

Note: Accuracy for mechanical and hydraulic zero position is crucial. The use of the 198-4240 Electric Pressure Gauge Group is highly recommended.

Pump Setup

Note: A power supply is required to operate the solenoid. The supply should be capable of delivering 0 mA to 1.5 mA with an infinite setting in that range.

1. Install pressure taps in the following test ports:

   • (49) gauge port for stroking pressure

   • (53) gauge port for discharge pressure

   • (54) gauge port for discharge pressure

   • (59) gauge port for stroking pressure

2. Connect power supply to the connector for electric solenoid (50) or (56).

3. Connect pump discharge ports (63) and (64) using "XT5" hoses to the 9U-5902 Rectifier Block high-pressure ports (65) and (67).

4. Connect the 9U-5902 Rectifier Block outlet (66) to the flow meter inlet on the test bench.

5. Connect the flow meter outlet to the 9U-5398 Heat Exchanger inlet (69).

6. Connect a water line to the water inlet (71) on the 9U-5398 Heat Exchanger. Connect a water line to the water outlet (72) on the 9U-5398 Heat Exchanger.

7. Connect the 9U-5398 Heat Exchanger outlet (70) to the low-pressure return (68) on the 9U-5902 Rectifier Block.

8. Connect the red transducer 34500 kPa (5000 psi) (74) or 8T-0860 Pressure Gauge to the pump gauge port for discharge pressure (53) and (54).

9. Connect auxiliary pump oil supply to the charge oil supply port for the pump (52). Be sure that the test bench can supply enough charge oil for Steps 1 through Step 6.

10. Vent port (60) to atmosphere.

11. Fill the pump case with oil. Pour oil directly into case drain port (62) until the case is completely full. Plug vent port (60) once the case is full. Connect an in-line flow meter to the case drain port (62). Direct flow from case drain port (62) to test bench reservoir.

    Note: Do not rotate the pump in the wrong direction. The correct direction of rotation will be stated on the pump. The correct direction of rotation will also be in the test specifications. The direction of rotation is viewed from the input shaft end.

12. Visually check the pump for proper rotation.

Adjustment for Mechanical Zero Position

1. Turn the load control on the test bench completely clockwise to control the pump discharge pressure. Start rotating the pump at the value in Step 1. This unit is not equipped with a charge pump. Be sure to sustain charge pump flow to port (52) in Steps 1 through step 5 of the test specifications. Vent the ports for the stroking pressure (49) and (59) to the atmosphere. This will equalize the pressure on the servo spool. Install pressure gauges on ports (53) and (54). Turn the load control on the test bench completely clockwise to control the pump discharge pressure. If the mechanical zero adjustment is incorrect, a discharge pressure higher than the charge pressure may occur.

2. Turn the adjustment screw for the mechanical centering (57) clockwise. Continue to turn the adjustment screw until a pressure of 200 psi above charge pressure is achieved. This pressure may be seen on the gauge port for the system pressure B (54) or gauge port for the system pressure A (53). Mark the position of the adjustment screw for the mechanical centering (57).

3. Turn adjustment screw for the mechanical centering (57) counterclockwise until pressure increases on gauge ports (53) or (54). Mark the position of the adjustment screw for the mechanical centering (57).

4. A mark should be placed halfway between position one and position two. Turn the adjustment screw for the mechanical centering (57) to the midpoint of both marks. There should be less than a 34.5 kPa (5 psi) pressure differential between pump gauge ports (53) and (54).

5. Stop rotating the pump. Turn the load control on the test bench for pump discharge pressure counterclockwise. Allow the discharge pressure of the pump to decrease. Disconnect pressure gauges from ports (53) and (54).

Adjustment for Hydraulic Zero Position

1. Connect two blue transducers 3450 (500 psi) or connect two 6000 kPa (870 psi) 8T-0856 Pressure Gauges into both gauge ports for stroking pressure (49) and (59).

2. Start rotating the pump to the value listed in S step 2 of the test specifications. Turn the load control for the pump discharge pressure clockwise. This will allow pump discharge pressure to increase in the following steps.

3. Adjust the adjustment screw for hydraulic zero (51) until the pressure at the gauge ports for the stroking pressure (49) and (59) differ by less than 21 kPa (3 psi).

   Note: Do not turn the adjustment screw for the hydraulic zero (51) more than 90 degrees in either direction.

4. Turn the load control for the pump discharge pressure counterclockwise. This will allow pump discharge pressure to decrease. Stop rotating the pump and allow pump pressure to dissipate. Disconnect the pressure gauges that are connected to the gauge ports for stroking pressure (49) and (59).

Test Procedure

Note: The steps in the procedure correlate with the steps under the test specifications according to your specific part number.

The contamination level of the hydraulic oil in the test bench should be ISO 16/13 or better. The oil in the test bench should be one of the following.

• SAE 10W at 50 °C (122 °F) or

• Mobil DTE-11 at 46 °C (115 °F)

Illustration 16	g01388850

Illustration 17	g01388851

1. Start rotating the pump according to the RPM listed in Step 1 of the Test Specifications. Pumps without a charge pump will require auxiliary charge flow according to the value in Step 1 of the Test Specifications. Verify the flow rates and listen for abnormal noise. Verify that all connections are secure. Verify that all connections are tight. Check for leaks around shaft seals. Check for leaks around control valves. Run the pump for at least five minutes to raise the temperature of the oil and purge the system of air.

   Note: The pump has two separate solenoids. Test one solenoid at a time then repeat Step 2 through Step 6 of the Test Procedure to test the other solenoid. For pumps with a high-pressure cut repeat Step 2 through Step 7 of the Test Procedure.

2. Slowly increase the pump RPM to the value in Step 2 of the Test Specifications. Increase the signal current to solenoid (50) or (56) according to the value in Step 2 of the Test Specifications. This is the point of upstroke of the pump. The pump operation or the control of the signal pressure may not be operating properly if the actual discharge flow is not correct.

   Note: Some flow meters may not be able to read discharge flows at this level. Slowly increase signal current to a value that is higher than the value in Step 2 of the Test Specifications if the flow meter does not register the flow. Continue until the flow begins to register.

   Note: If testing a pump with different stroke limiter settings for each discharge port skip Step 3 of the Test Procedure. Continue to Step 4a and Step 4b of the Test Procedure.

3. Increase the signal current to (50) or (56) to the value listed in Step 3 of the Test Specifications. The pump should be fully upstroked at this time. Record actual pump flow. The pump or the control for the proportional solenoid valve may not be mechanically feasible if the actual flow is not equal to the value in Step 3 of the Test Specifications. Continue to step 5 of the Test Procedure.

4. Step 4a and Step 4b of the Test Procedure should be performed on pumps with different stroke limiter settings for each discharge port.

   1. The following steps with verify the operation of the stroke limiter. Increase the signal current to (56) to the value listed in Step 4a of the Test Specifications. Slowly increase the pump RPM to the value in Step 4a of the Test Specifications. Adjust the adjustment screw for stroke limiter (58) until the flow value agrees with the value in step 4a of the Test Specifications.

   2. Increase the signal current to (50) to the value listed in Step 4b of the Test Specifications. Adjust the adjustment screw for stroke limiter (61) until the flow value agrees with the value in step 4b of the Test Specifications.

5. Increase pump discharge pressure to the value in Step 5 of the Test Specifications. Measure pump leakage at this point. Calculate the total loss. The pump may not be mechanically feasible if the total loss is higher than the allowable value in Step 5 of the Test Specifications.

   Subtract the discharge flow that was recorded in Step 5 of the Test Procedure from the discharge flow that was recorded in Step 3 of the Test Procedure to find the total loss.

   Example: Step 4 flow 162 L/min (42.8 US gpm) - "Step 3 flow" 158 L/min (41.7 US gpm) = "total loss" 4 L/min (1.1 US gpm). The "max. allowable loss" is 7.2 L/min (1.9 US gpm).

   The pump in the example is acceptable because the actual total loss is less than the maximum allowable loss.

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   Pump test pressures in this guideline may exceed the normal operating range of the hydraulic test hoses utilized when connecting the tested pump to the test bench. However, the order of magnitude of these pressures is significantly below the burst strength of the Caterpillar XT6 product. High pressure oil can escape through improperly assembled hoses and fittings. High pressure oil can also escape through poorly maintained hoses and fittings. High pressure oil may also leak through hose that has become damaged over the life of the hose due to the pressure levels that occur during test bench operation. Personal injury or death can result during adjustment of the high pressure relief valve if recommended hose maintenance practices are not followed. Escaping fluid under pressure can penetrate body tissue causing serious injury, and possible death. Adjustment of the high pressure cut or pressure override valve shall only be performed when the pump is operating at a zero discharge pressure condition. Continuation of the pump test procedure can be resumed when this high pressure adjustment is completed.

   Note: If testing a pump with a high-pressure cut skip Step 6 of the Test Procedure. Continue to 7 of the Test Procedure.

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   Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

6. Slowly increase the pump discharge pressure to the value in Step 6 of the Test Specifications. If the actual discharge pressure is not within the specification then the crossover relief valves must be replaced. The discharge flow should be zero when the crossover relief valves reach the pressure specification given in Step 6 of the Test Specifications.

   Repeat Step 2 through Step 6 of the Test Procedure by connecting the power supply to the opposite connector for electrical solenoid (50) or (56).

   Reduce RPM and all pressures to zero. Remove the component from the test bench. Drain the oil from the pump. Cap all ports or plug all ports.

7. Step 7 should be performed on pumps with a high-pressure cut.

   Slowly increase the discharge pressure to the value in Step 7 of the Test Specifications. Turn the adjustment screw for the high-pressure cut (see Illustration 7) until the actual high-pressure cut value is equal to the value in Step 7 of the Test Specifications. The discharge flow should be zero when the high-pressure cut is reached.

   Repeat Step 2 through Step 7 of the Test Procedure by connecting the power supply to the opposite connector for electrical solenoid (50) or (56).

Show/hide table

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

Reduce RPM and all pressures to zero. Remove the component from the test bench. Drain the oil from the pump. Cap all ports or plug all ports.

Test Specifications

Table 3

Part Number	_________________________
Rotation	_________________________
Step	1	2	3	5	6
RPM	_______________	_______________	_______________	_______________	_______________
Signal Current mA	_______________	_______________	_______________	_______________	_______________
Discharge Pressure kPa (psi)	_______________	_______________	_______________	_______________	_______________
Discharge Flow lpm (gpm)	_______________	_______________	_______________	_______________	_______________
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge flow from the actual step 5 discharge flow. This is the Total Loss.			_______________	-
Charge Pressure kPa (psi)	_______________	_______________	_______________	_______________	_______________
Auxiliary Charge Flow lpm (gpm)	_______________	_______________	_______________	_______________	_______________

Table 4

Part Number	159-9454
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	600 mA	600 mA	600 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	25000 kPa (3626 psi)	34500 kPa (5004 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	39 L/min (10 US gpm)	39 L/min (10 US gpm)	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge flow from the actual step 5 discharge flow. This is the Total Loss.			1.6 L/min (0.42 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	6.7 L/min (1.77 US gpm) (Internal)	8.3 L/min (2.2 US gpm) (Internal)	8.3 L/min (2.2 US gpm) (Internal)	8.3 L/min (2.2 US gpm) (Internal)	8.3 L/min (2.2 US gpm) (Internal)

(1)	Discharge pressure equals charge pressure.

Table 5

Part Number	270-3950
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	600 mA	600 mA	600 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(2)	2000 kPa (290 psi)(2)	25000 kPa (3626 psi)	34500 kPa (5004 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	39 L/min (10 US gpm)	39 L/min (10 US gpm)	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge flow from the actual step 5 discharge flow. This is the Total Loss.			1.6 L/min (0.42 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 6

Part Number	270-3952
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	600 mA	600 mA	600 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	25000 kPa (3626 psi)	34500 kPa (5004 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	46 L/min (12.1 US gpm)	46 L/min (12.1 US gpm)	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2 L/min (0.53 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 7

Part Number	277-5072(1)
Rotation	Clockwise
Step	1	2	4a	4b	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	600 mA	600 mA	600 mA	600 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(2)	2000 kPa (290 psi)(2)	2000 kPa (290 psi)(2)	2000 kPa (290 psi)(2)	25000 kPa (3626 psi)	34500 kPa (5004 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	38.5 L/min (10.2 US gpm)	41.5 L/min (10.9 US gpm)	41.5 L/min (10.9 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 4b Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.				1.8 L/min (0.5 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	This pump has different stroke limiter settings for each discharge port.
(2)	Discharge pressure equals charge pressure.

Table 8

Part Number	337-4017(1)
Rotation	Counter-Clockwise
Step	1	2	3	5	7
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	600 mA	600 mA	600 mA
Discharge Pressure kPa (psi)	2500 kPa (363 psi)(2)	2500 kPa (363 psi)(1)	2500 kPa (363 psi)(1)	25000 kPa (3626 psi)	30000 (4350) 30000 kPa (4350 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	63 L/min (16.6 US gpm)	63 L/min (16.6 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2.75 L/min (0.74 US gpm)	-
Charge Pressure kPa (psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)
Auxiliary Charge Flow lpm (gpm)	12 L/min (3.2 US gpm)(Internal)	12 L/min (3.2 US gpm)(Internal)	12 L/min (3.2 US gpm)(Internal)	12 L/min (3.2 US gpm)(Internal)	12 L/min (3.2 US gpm)(Internal)

(1)	This pump has a high presure cut
(2)	Discharge pressure equals charge pressure.

Table 9

Part Number	353-5929
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	1400 mA	1400 mA	1400 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(2)	2000 kPa (290 psi)(2)	25000 kPa (3626 psi)	35000 kPa (5075 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	45 L/min (11.9 US gpm)	45 L/min (11.9 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2 L/min (0.53 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 10

Part Number	356-0768
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	5200 mA	1500 mA	1500 mA	1500 mA
Discharge Pressure kPa (psi)	2500 kPa (363 psi)(1)	2500 kPa (363 psi)(1)	2500 kPa (363 psi)(1)	27000 kPa (3915 psi)	38000 kPa (5510 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	46 L/min (12.2 US gpm)	46 L/min (12.2 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2 L/min (0.53 US gpm)	-
Charge Pressure kPa (psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 11

Part Number	356-0782
	Canceled replaced by 420-1972.

Table 12

Part Number	357-7414
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	500 mA	1400 mA	1400 mA	1400 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	25000 kPa (3626 psi)	35000 kPa (5075 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	63 L/min (16.6 US gpm)	63 L/min (16.6 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2.7 L/min (0.7 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 13

Part Number	363-7416
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	500 mA	1400 mA	1400 mA	1400 mA
Discharge Pressure kPa (psi)	2500 kPa (363 psi)(1)	2500 kPa (363 psi)(1)	2500 kPa (363 psi)(1)	27000 kPa (3915 psi)	38000 kPa (5511.52000 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	63 L/min (16.6 US gpm)	63 L/min (16.6 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2.7 L/min (0.7 US gpm)	-
Charge Pressure kPa (psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 14

Part Number	374-6735
	This is a tandem pump made of two 363-7416 pumps (See this document).

Table 15

Part Number	386-5821
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	1350 mA	1350 mA	1350 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	33750 kPa (4900 psi)	37500 kPa (5440 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	28 L/min (7.4 US gpm)	28 L/min (7.4 US gpm)	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2 L/min (0.5 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 16

Part Number	389-8426
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	500 mA	1400 mA	1400 mA	1400 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	2000 kPa (290 psi)(1)	25000 kPa (3626 psi)	35000 kPa (5075 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	63 L/min (16.6 US gpm)	63 L/min (16.6 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2.7 L/min (0.7 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 17

Part Number	398-1366
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	500 mA	1400 mA	1400 mA	1400 mA
Discharge Pressure kPa (psi)	2500 kPa (363 psi)(1)	2500 kPa (363 psi)(1)	2500 kPa (363 psi)(1)	23850 kPa (3460 psi)	26500 kPa (3845 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	45 L/min (11.8 US gpm)	45 L/min (11.8 US gpm)	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2 L/min (0.5 US gpm)	-
Charge Pressure kPa (psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)
Auxiliary Charge Flow lpm (gpm)	11 L/min (2.9 US gpm)(External)	11 L/min (2.9 US gpm)(External)	11 L/min (2.9 US gpm)(External)	11 L/min (2.9 US gpm)(External)	11 L/min (2.9 US gpm)(External)

(1)	Discharge pressure equals charge pressure.

Table 18

Part Number	420-1972(1)
Rotation	Clockwise
Step	1	2	3	5	6
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	500 mA	1500 mA	1500 mA	1500 mA
Discharge Pressure kPa (psi)	2500 kPa (363 psi)(2)	2500 kPa (363 psi)(2)	2500 kPa (363 psi)(2)	27000 kPa (3915 psi)	38000 kPa (5511.52000 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	63 L/min (16.6 US gpm)	63 L/min (16.6 US gpm)Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2.7 L/min (0.7 US gpm)	-
Charge Pressure kPa (psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)	2500 kPa (363 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	Has 12 Volt interlock valve.
(2)	Discharge pressure equals charge pressure.

Table 19

Part Number	577-8671(1)
Rotation	Counter-Clockwise
Step	1	2	3	5	7
RPM	800 rpm	1000 rpm	1000 rpm	1000 rpm	800 rpm
Signal Current mA	0	200 mA	600 mA	600 mA	600 mA
Discharge Pressure kPa (psi)	2000 kPa (290 psi)(2)	2000 kPa (290 psi)(2)	2000 kPa (290 psi)(2)	25000 kPa (3626 psi)	30000 (4350) 30000 kPa (4350 psi)
Discharge Flow lpm (gpm)	0	1 L/min (0.26 US gpm)	45 L/min (11.8 US gpm)	45 L/min (11.8 US gpm)	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual step 3 Discharge Flow from the actual Step 5 Discharge Flow. This is the Total Loss.			2 L/min (0.5 US gpm)	-
Charge Pressure kPa (psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)	2000 kPa (290 psi)
Auxiliary Charge Flow lpm (gpm)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)	15 L/min (4 US gpm)(External)

(1)	This pump has a high presure cut
(2)	Discharge pressure equals charge pressure.

Test Bench Tooling

Table 20

Pump Number	Mounting Plate	Drive Adapter	Split Flange	Flange Adapter	Pump Discharge Gauge Ports	Charge Oil Supply Port	Gauge Port for Charge Pressure	Gauge Ports for Stroking Pressure	Case Drain Port
159-9454	1U-9127	4C-4088	1P-4576	9U-7438	7/16-20 STOR	1 5/16-12 STOR	3/4-16 STOR	7/16-20 STOR	7/16-20 STOR
270-3950	1U-9127	4C-4088	1P-4576	9U-7438	7/16-20STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	1 1/16-12 STOR
270-3952	1U-9127	4C-4088	1P-4576	9U-7438	7/16-20 STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	1 1/16-12 STOR
277-5072	1U-9127	1U-9834	-	1 1/16-12 STOR	7/16-20 STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
337-4017	1U-9128	1U-9834	8T-9403	9U-7439	7/16-20 STOR	-	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
353-5929	1U-9127	4C-4088	8T-9403	9U-7438	7/16-20 STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
356-0768	1U-9127	4C-4088	8T-9403	9U-7438	7/16-20 STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
356-0782	Canceled replaced by 420-1972.
357-7414	1U-9128	1U-9833	8T-9403	9U-7438	7/16-20 STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
363-7416	1U-9127	1U-9833	M27x2	-	M12x1.5	M26x1.5	M14x1.5	M12x1.5	M18x1.5
374-6735	This is a tandem pump made of two 363-7416 pumps (See this document).
386-5821	1U-9127	4C-4088	8T-9403	9U-7438	7/16-20 STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
389-8426	1U-9128	1U-9834	8T-9403	9U-7438	7/16-20 STOR	3/4-16 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
398-1366	1U-9127	4C-4088	1 1/16-12 STOR		7/16-20 STOR	3/4-16 STOR	-	7/16-20 STOR	7/8-14 STOR
420-1972	1U-9128	1U-9834	1 1/16-12 STOR		7/16-20 STOR	9/16-18 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR
577-8671	1U-9127	1U-9834	1 1/16-12 STOR		7/16-20 STOR	1 5/16-12 STOR	9/16-18 STOR	7/16-20 STOR	7/8-14 STOR