Bench Test Procedure for Hydraulic Piston Pumps {5070} Caterpillar

Asphalt Compactor

CB-534D (S/N: EAA1-UP; FEA1-UP; GCA1-UP; C2B1-UP; C4B1-UP; FGH1-UP; B5M1-UP; C8M1-UP)

CB-564D (S/N: C6D1-UP; D4M1-UP)

CB64 (S/N: CB51-UP; DJM1-UP)

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

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

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

Paving Compactor

CD54 (S/N: C3B1-UP; J5R1-UP)

Vibratory Asphalt Compactor

CB13 (S/N: LP91-UP; PWP1-UP)

CB15 (S/N: M941-UP; NPB1-UP)

CB16 (S/N: HP51-UP; KHC1-UP)

CB54 (S/N: K3J1-UP; JLM1-UP)

Introduction

Table 1

Revision	Summary of Changes in REHS9391
01	Updated effectivity.
00	New document.

© 2018 Caterpillar All Rights Reserved. This guideline is for the use of Caterpillar 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 questions or additional information concerning this guideline, submit a feedback form in the Service Information System website. To address an urgent need, please use the following to relay your request to Caterpillar Repair Process Engineering:

• Cat Dealer Technical Communicator

• Dealer Solution Network

• Cat Technical Representative

• Knowledge Network (online)

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

Show/hide table

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.

Show/hide table

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	g01140178
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	g01140179
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	g01140180
Connections for the test bench (26) Flow meter 1 loop and flow meter 2 loop (27) Oil supply

Illustration 5	g01140183
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	g01140185
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

Pump Illustrations

This type of pump is manufactured in several different configurations shown in Illustrations 7 and 8. Although configurations differ in appearance, they will be tested the same. Use Illustrations 7 and 8 for identifying port locations during the "Pump Setup"

Illustration 7	g03857332
Port locations for pump type 1 (49) Gauge port for stroking pressure (50) Connector for electrical solenoid (51) Adjustment screw for hydraulic zero (52) Suction port for charge pump (53) Pump discharge port (54) Pump discharge port (55) Case drain port (56) Connector for electrical solenoid (57) Adjustment screw for mechanical zero (58) Gauge port for stroking pressure (59) Return port for charge pump (60) Adjustment screw for high-pressure cut (61) Discharge port for charge pump (62) Gauge port for discharge pressure (63) Gauge port for discharge pressure (64) Gauge port for charge pressure (65) Electrical connector for on/off solenoid

Illustration 8	g03857334
Port locations for pump type 2 (49) Gauge port for stroking pressure (50) Connector for electrical solenoid (51) Adjustment screw for hydraulic zero (52) Suction port for charge pump (53) Pump discharge port (54) Pump discharge port (55) Case drain port (56) Connector for electrical solenoid (57) Adjustment screw for mechanical zero (58) Gauge port for stroking pressure (59) Return port for charge pump (60) Adjustment screw for high-pressure cut (61) Discharge port for charge pump (62) Gauge port for discharge pressure (63) Gauge port for discharge pressure (64) Gauge port for charge pressure (65) Electrical connector for on/off solenoid

Illustration 9	g03857754
Hydraulic schematic for pump type 1 (49) Gauge port for stroking pressure (50) Connector for electrical solenoid (51) Adjustment screw for hydraulic zero (52) Suction port for charge pump (53) Pump discharge port (54) Pump discharge port (55) Case drain port (56) Connector for electrical solenoid (57) Adjustment screw for mechanical zero (58) Gauge port for stroking pressure (59) Return port for charge pump (60) Adjustment screw for high-pressure cut (61) Discharge port for charge pump (62) Gauge port for discharge pressure (63) Gauge port for discharge pressure (64) Gauge port for charge pressure (65) Electrical connector for on/off solenoid

Illustration 10	g03857755
Hydraulic schematic for pump type 2 (49) Gauge port for stroking pressure (50) Connector for electrical solenoid (51) Adjustment screw for hydraulic zero (52) Suction port for charge pump (53) Pump discharge port (54) Pump discharge port (55) Case drain port (56) Connector for electrical solenoid (57) Adjustment screw for mechanical zero (58) Gauge port for stroking pressure (59) Return port for charge pump (60) Adjustment screw for high-pressure cut (61) Discharge port for charge pump (62) Gauge port for discharge pressure (63) Gauge port for discharge pressure (64) Gauge port for charge pressure (65) Electrical connector for on/off solenoid

9U-5902 Rectifier Block

Illustration 11	g01435070
9U-5902 Rectifier Block Connections

Illustration 12	g01348031
9U-5902 Rectifier Block Schematic (66) High-pressure port (67) High-pressure outlet (68) High-pressure port (69) Low-pressure inlet

9U-5893 Heat Exchanger

Illustration 13	g01348036
9U-5893 Heat Exchanger Connections (70) Inlet from flow meter loop (71) Outlet "to rectifier block" (72) Water inlet (73) Water outlet

198-4240 Electric Pressure Gauge Group

Illustration 14	g01348034
198-4240 Electric Pressure Gauge Group Connections (74) Pressure gauge (75) Red transducer 34500 kPa (5000 psi) (76) Blue transducer 3450 kPa (500 psi)

Note: The accuracy of the mechanical zero position and the 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 power supply should be capable of delivering 0 mA to 1200 mA with an infinite setting in that range.

1. Install pressure taps in the following test ports:

   (49) Gauge port for stroking pressure

   (58) Gauge port for stroking pressure

   (62) Gauge port for discharge pressure

   (63) Gauge port for discharge pressure

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

3. Connect power supply to the electrical connector for on/off solenoid (65).

4. Connect pump discharge ports (53) and (54) to the 9U-5902 Rectifier Block high-pressure ports (66) and (68).

5. Connect the 9U-5902 Rectifier Block outlet (67) to the flow meter inlet on the test bench.

6. Connect the flow meter outlet to the 9U-5398 Heat Exchanger inlet (70) .

7. Connect the 9U-5893 Heat Exchanger outlet (71) to the low-pressure return (69) on the 9U-5902 Rectifier Block.

8. Connect the red transducer 34500 kPa (5000 psi) (75) or 8T-0860 Pressure Gauge to the pump's gauge ports for discharge pressure (62) and (63) .

9. Some pumps do not have internal charge pumps. Refer to the Test Specifications if the pump that is being tested uses an internal charge pump or an external charge pump. Connect the charge pump suction port (52) to the test bench oil supply for pumps with an internal charge pump. Pumps without an internal charge pump will require auxiliary charge flow supplied to the suction port (52)

10. Connect discharge port for charge pump (61) to return port for charge pump (59) or gauge port for charge pressure (64) if port (59) is not present.

11. Purge all air from the suction line. Loosen the suction hose at the pump until oil leaks from the connection. Tighten the suction hose.

12. Fill the pump case with oil. Pour oil directly into case drain port (55) until the case is full. Direct flow from case drain port (55) to test bench reservoir.

13. 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. 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 of the Test Specifications. Be sure to sustain charge pump flow to the pump in Steps 1 through 5 of the Adjustment for Mechanical Zero. Vent the ports for the stroking pressure (49) and (58) to the atmosphere. This will equalize the pressure on the servo spool. Install pressure gauges on ports (62) and (63). 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.

   Note: Increase signal current to solenoid (65) until on/off solenoid is activated.

   Note: If the mechanical zero is unable to be set correctly, the hydraulic zero may be too far out of adjustment. In this case it will be necessary to set the hydraulic zero within 300 kPa (43.5 psi) using the procedure "Adjustment for Hydraulic Zero Position". Try to set the mechanical zero again. This may need to repeated several times to correctly achieve the mechanical zero adjustment. After the mechanical zero is set, proceed to "Adjustment for Hydraulic Zero Position". For the final hydraulic zero adjustment, set the hydraulic zero within 21 kPa (3 psi)

2. Turn the adjustment screw for the mechanical centering (57) clockwise. Continue to turn 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 (62) or gauge port for the system pressure A (63). 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 (62) or (63). 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 (62) and (63).

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 (62) and (63).

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 (58).

2. Start rotating the pump to the value listed in Step 1 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.

   Note: Increase signal current to solenoid (65) until on/off solenoid is activated.

3. Adjust the adjustment screw for hydraulic zero (51) until the pressure at the gauge ports for the stroking pressure (49) and (58) 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 (58).

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 15	g01143449

Illustration 16	g01143458

1. Start rotating the pump according to the RPM 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. Check the gauge port for the charge pressure (64). Compare the actual charge pressure with the value in Step 1 of the Test Specifications. If the charge pressure is not within the Test Specifications adjust the charge relief valve. Adjust the charge relief valve by turning the adjustment screw clockwise or counterclockwise accordingly. Run the pump for at least five minutes in order to raise the temperature of the oil and purge the system of air.

   Note: Increase signal current to solenoid (65) until on/off solenoid is activated.

   Note: The pump has two separate directional solenoids (50) and (56). Test one solenoid at a time then repeat steps 2 through 5 of the Test Procedure in order to test the other solenoid.

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.

3. Increase the signal current to (50) or (56) to the value 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.

4. Increase pump discharge pressure to the value in Step 4 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 4 of the Test Specifications.

   Subtract the discharge flow that was recorded in Step 4 of the Test Procedure from the discharge flow that was recorded in Step 3 of the Test Procedure in order to find the total loss.

   Example: Step 5 flow 162 L/min (42.8 US gpm) - "Step 4 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.

   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 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.

5. Slowly increase the pumps discharge pressure to the value in Step 5 of the Test Specifications. Ifthe actual discharge pressure is not within the specification then turn the adjustment screw for high pressure cut (60) until the actual high-pressure cut value is equal to the value in Step 5 of the Test Specifications. The discharge flow should be zero when the high-pressure cut is reached.

Repeat Steps 2 through 5of 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.

Note: Crossover relief valves are not preset from factory. If crossover relief valves are replaced, they must be adjusted while installed on the machine. See Testing and Adjusting manual for specific machine.

Test Specifications

Table 3

Part Number	203-2074
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	1000
Signal Current mA	0	400	1200	1200	1200
Discharge Pressure kPa (psi)	2500 (363)(1)	2500 (363)(1)	2500 (363)(1)	22500 (3263)	42500 (6165)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	56 (14.8)	56 (14.8) Max	0
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.24 (0.6)	-
Charge Pressure kPa (psi)	2500 (363)	2500 (363)	2500 (363)	2500 (363)	2500 (363)
Auxiliary Charge Flow liter per minute (gpm)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)

(1)	Discharge pressure equals charge pressure

Table 4

Part Number	227-9570
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	1000
Signal Current mA	0	400	1200	1200	1200
Discharge Pressure kPa (psi)	2000 (290)(1)	2000 (290)(1)	2000 (290)(1)	22000 (3191)	35000 (5080)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	71 (18.8)	71 (18.8) Max	0
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.84 (0.75)	-
Charge Pressure kPa (psi)	2000 (290)	2000 (290)	2000 (290)	2000 (290)	2000 (290)
Auxiliary Charge Flow liter per minute (gpm)	19.6 (5.2) (External)	19.6 (5.2) (External)	19.6 (5.2) (External)	19.6 (5.2) (External)	19.6 (5.2) (External)

(1)	Discharge pressure equals charge pressure

Table 5

Part Number	269-3126
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	1000
Signal Current mA	0	400	1200	1200	1200
Discharge Pressure kPa (psi)	2500 (363)(1)	2500 (363)(1)	2500 (363)(1)	22500 (3263)	42500 (6165)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	56 (14.8)	56 (14.8) Max	0
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.24 (0.6)	-
Charge Pressure kPa (psi)	2500 (363)	2500 (363)	2500 (363)	2500 (363)	2500 (363)
Auxiliary Charge Flow liter per minute (gpm)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)

(1)	Discharge pressure equals charge pressure

Table 6

Part Number	269-3127
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	1000
Signal Current mA	0	400	1200	1200	1200
Discharge Pressure kPa (psi)	2000 (290)(1)	2000 (290)(1)	2000 (290)(1)	22000 (3191)	35000 (5080)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	71 (18.8)	71 (18.8) Max	0
Pump Loss Efficiency lpm (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.84 (0.75)	-
Charge Pressure kPa (psi)	2000 (290)	2000 (290)	2000 (290)	2000 (290)	2000 (290)
Auxiliary Charge Flow liter per minute (gpm)	19.6 (5.2) (External)	19.6 (5.2) (External)	19.6 (5.2) (External)	19.6 (5.2) (External)	19.6 (5.2) (External)

(1)	Discharge pressure equals charge pressure

Table 7

Part Number	280-3455
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	600
Signal Current mA	0	400	1200	1200	1200
Discharge Pressure kPa (psi)	2500 (363)(1)	2500 (363)(1)	2500 (363)(1)	225000 (3263)	42500 (6165)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	56 (14.8)	56 (14.8) Max
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.24 (0.6)	-
Charge Pressure kPa (psi)	2500 (363)	2500 (363)	2500 (363)	2500 (363)	2500 (363)
Charge Flow liter per minute (gpm)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)

(1)	Discharge pressure equals charge pressure

Table 8

Part Number	285-3599
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	600
Signal Current mA	0	650	1200	1550	1550
Discharge Pressure kPa (psi)	2500 (363)(1)	2500 (363)(1)	2500 (363)(1)	225000 (3263)	42500 (6165)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	56 (14.8)	56 (14.8) Max	-
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.24 (0.6)	-
Charge Pressure kPa (psi)	2500 (363)	2500 (363)	2500 (363)	2500 (363)	2500 (363)
Charge Flow liter per minute (gpm)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)

(1)	Discharge pressure equals charge pressure

Table 9

Part Number	286-2477
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	00
Signal Current mA	0	665	1479	1479	1479
Discharge Pressure kPa (psi)	2500 (363)(1)	2500 (363)(1)	2500 (363)(1)	225000 (3263)	44990 (6525)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	57 (15)	57 (15)	-
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.24 (0.6)	-
Charge Pressure kPa (psi)	2500 (363)	2500 (363)	2500 (363)	2500 (363)	2500 (363)
Charge Flow liter per minute (gpm)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)

(1)	Discharge pressure equals charge pressure

Table 10

Part Number	321-5132
Rotation	Clockwise
Step	1	2	3	4	5
RPM	800	1000	1000	1000	800
Signal Current mA	0	400	1200	1200	1200
Discharge Pressure kPa (psi)	2500 (363)(1)	2500 (363)(1)	2500 (363)(1)	21250 (3082)	42500 (6164)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	67 (18)	67 (18)	0
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			2.84 (.75)	-
Charge Pressure kPa (psi)	2500 (363)	2500 (363)	2500 (363)	2500 (363)	2500 (363)
Auxiliary Charge Flow liter per minute (gpm)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)	11.6 (3) (External)

(1)	Discharge pressure equals charge pressure

Table 11

Part Number	423-7224
Rotation	1	2	3	4	5
Step	Clockwise
RPM	800	1000	1000	1000	1000
Signal Current mA	0	400	1200	1200	1200
Discharge Pressure kPa (psi)	2500 (363)(1)	2500 (363)(1)	2500 (363)(1)	22500 (3263)	42500 (6163)
Discharge Flow liter per minute (gpm)	0	1 (0.26)	71 (18.8)	71 (18.8)	0
Pump Loss Efficiency liter per minute (gpm)	Subtract the actual Step 4 Discharge Flow from the actual Step 3 Discharge Flow. This is the Total Loss.			3.6 (1)	-
Charge Pressure kPa (psi)	2500 (363)	2500 (363)	2500 (363)	2500 (363)	2500 (363)
Charge Flow liter per minute (gpm)	15.6 (4.1) (External)	19.6 (5.1) (External)	19.6 (5.1) (External)	19.6 (5.1) (External)	19.6 (5.1) (External)

(1)	Discharge pressure equals charge pressure

Test Bench Tooling

Table 12

Tooling
Pump Number	203-2074	227-9570	269-3126	269-3127	280-3455	285-3599
Gauge Port for Charge Pressure (64)	9/16-18STOR	9/16-18STOR	9/16-18 STOR	3/4-16 STOR	9/16-18 STOR	9/16-18 STOR
Gauge Port for Stroking Pressure (58)	7/16-20STOR	7/16-20STOR	7/16-20STOR	7/16-20STOR	7/16-20 STOR	7/16-20 STOR
Pump Discharge Gauge Ports	7/16-20STOR	7/16-20STOR	7/16-20STOR	7/16-20STOR	7/16-20 STOR	7/16-20 STOR
Case Drain Port	1 1/16-12STOR	1 1/16-12STOR	1 1/16-12STOR	1 1/16-12STOR	1 1/16-12 STOR	1 1/16-12 STOR
Charge Supply	-	-	-		-	-
Charge Pump Discharge Port	-	-	-	-	-	-
Charge Pump Return Port	3/4-16STOR	3/4-16STOR	3/4-16STOR	3/4-16STOR	3/4-16STOR	3/4-16STOR
Split Flange	1P-5765	1P-5766	1 1/16-12 STOR	1P-5765	1P-5765	1P-5765
Flange Adapter	9U-7438	9U-7439		9U-7438	9U-7438	9U-7438
Mounting Plate	1U-9128	1U-9128	1U-9128	1U-9128	1U-9128	1U-9128
Drive Adapter	133-2329	133-2329	133-2329	1U-9834	133-2329	133-2329

Table 13

Tooling
Pump Number	286-2477	321-5132	423-7224
Gauge Port for Charge Pressure (64)	9/16-18 STOR	3/4-16 STOR	3/4-16 STOR
Gauge Port for Stroking Pressure (58)	7/16-20 STOR	7/16-20 STOR	7/16-20 STOR
Pump Discharge Gauge Ports	7/16-20 STOR	7/16-20 STOR	7/16-20 STOR
Case Drain Port	1 1/16-12 STOR	1 1/16-12 STOR	1 1/16-12 STOR
Charge Supply	-	-	1 1/16-12 STOR
Charge Pump Discharge Port	-	-	7/8-14 STOR
Charge Pump Return Port	3/4-16STOR	1 1/16-12 STOR	1 1/16-12 STOR
Split Flange	1P-5765	124-4288	6V-0400
Flange Adapter	9U-7438	9U-7439	9U-7439
Mounting Plate	1U-9128	1U-9128	1U-9128
Drive Adapter	133-2329	133-2329	133-2329