Bench Test Procedure for Hydraulic Piston Pumps {3203, 5070} Caterpillar

Marine Auxillary Engine

3512C (S/N: SLM1-UP)

Pipelayer

587R (S/N: BXL1-UP)

587T (S/N: FAT1-UP)

PL83 (S/N: KSD1-UP)

PL87 (S/N: KKJ1-UP)

Rotary Drill

MD6240 (S/N: DR21-UP)

MD6290 (S/N: DR31-UP)

MD6420 (S/N: DR41-UP)

Track Loader

953C (S/N: BBX2000-UP)

963C (S/N: BBD1-UP; 2DS1-UP)

973C (S/N: BCP1-UP; LDX1-UP; 3RZ1-UP)

Track-Type Tractor

D3G (S/N: CKA1-UP; CLB1-UP; CFC1-UP; CFF1-UP; JMH1-UP; ZDN1-UP; BYR1-UP; CXT1-UP)

D4G (S/N: FDC1-UP; HYD1-UP; CFN1-UP; TLX1-UP)

D5G (S/N: WGB1-UP; RSC1-UP; CLF1-UP; RKG1-UP; FDH1-UP; DKT1-UP; CLW1-UP; FDW1-UP)

D6N (S/N: DJA1-UP; JAH1-UP; CBJ1-UP; CCK1-UP; CBL1-UP; AKM1-UP; CCS1-UP; ALY1-UP; DJY1-UP)

D6T (S/N: JHB1-UP; ZEB1-UP; SMC1-UP; JWD1-UP; LBD1-UP; LAE1-UP; DJG1-UP; WCG1-UP; WFH1-UP; LKJ1-UP; SNK1-UP; KJL1-UP; SKL1-UP; GCT1-UP; RLW1-UP; LAY1-UP; PEZ1-UP)

D8N (S/N: 5TJ1-UP; 7TK1-UP)

D8R (S/N: MEJ1-UP; RJM1-UP; 7XM1-UP; 9EM1-UP; T5X1-UP; 6YZ1-UP)

D8R Series II (S/N: AKA1-UP)

Vibratory Compactor

CB-434B (S/N: 6AL87-UP; 7YN114-UP)

CB-434C (S/N: 4DN172-UP; 4MW1-UP)

CB-523B (S/N: 7FK1-UP)

CB-525B (S/N: 1NL1-UP)

CB-534B (S/N: 4JL330-UP; 5RN114-UP)

CB-534C (S/N: 4JL330-UP; 5HN187-UP; 1WS1-326)

CB-535B (S/N: 3AR122-UP)

CB-544 (S/N: 8FM1-UP)

CB-634C (S/N: 3BR138-555)

Wheel Dozer

854G (S/N: 1JW1-UP)

Introduction

Table 1

Revision	Summary of Changes in REHS1515
16	Added new Rotary Drill serial number prefixes DR2, DR3, and DR4 to document.
15	Added part number 474-2257 Piston Pump Gp to document.
	Added part number 480-2313 Piston Pump Gp to document.
14	Added part number 465-2615 Piston Pump Gp to document.
13	Added new Track-Type Tractor prefixes MEJ and RJM to document.
	Added part number 421-1808 Piston Pump Gp to document.
12	Added new Track-Type Tractor prefix T5X to document.
11	Updated Introduction.

© 2016 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 questions or additional information concerning this guideline, submit a feedback form in the Service Information System website. In order to address an urgent need, 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

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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.

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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 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) in order 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	g01063311
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	g01063312
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	g01063314
Connections for the Test Bench (26) "Flow meter 1" loop and "Flow meter 2" loop (27) Oil Supply

Illustration 5	g01093468
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	g01063316
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

This piston pump is produced with multiple types of housings. Port locations will vary, Match the correct illustration with the pump that is being worked on.

Illustration 7	g01409806
Typical port locations and adjustments (49) Gauge port for the stroking pressure "X1" (50) Pressure port for pilot pressure "Y1" (51) Adjustment screw for the servo control "Y1" (52) Return port for the charge pump "Fa" (53) Discharge port (54) Adjustment screw for hydraulic zero (55) Adjustment screw for the servo control "Y2" (56) Pressure port for pilot pressure "Y2" (57) Gauge port for the stroking pressure "X2" (58) Adjustment screw for mechanical zero (59) Adjustment screw for the high-pressure cut (if equipped) (60) Adjustment screw for the crossover relief valve (61) Gauge port for the system pressure "Mb" (62) Adjustment screw for the charge pressure relief valve (if equipped) (63) Adjustment screw for the crossover relief valve (64) Gauge port for the system pressure "Ma" (65) Gauge port for the charge pressure "G" (66) Case drain port (67) Gauge port for the control pressure "Ps" (68) Discharge port for the charge pump supply "Fe" (69) Gauge port for the high-pressure balance (if applicable) (70) Suction port for the charge pump supply "S" (71) Discharge port

Illustration 8	g01354920
Hydraulic Schematic for pumps with a charge pump and high-pressure cut valve (Pump Number: 129-5348) (49) Gauge port for the stroking pressure "X1" (50) Pressure port for pilot pressure "Y1" (52) Return port for the charge pump "Fa" (53) Discharge port (56) Pressure port for pilot pressure "Y2" (57) Gauge port for the stroking pressure "X2" (59) Adjustment screw for the high-pressure cut (if equipped) (60) Adjustment screw for the crossover relief valve (61) Gauge port for the system pressure "Mb" (63) Adjustment screw for the crossover relief valve (64) Gauge port for the system pressure "Ma" (65) Gauge port for the charge pressure "G" (66) Case drain port (67) Gauge port for the control pressure "Ps" (68) Discharge port for the charge pump supply "Fe" (69) Gauge port for the high-pressure balance (if applicable) (70) Suction port for the charge pump supply "S" (71) Discharge port

Illustration 9	g01354993
Hydraulic Schematic for pumps with a charge pump (Pump Numbers: 230-7333, 228-7586, 228-7585, 204-9765, 170-3608, 169-4665, 169-4664, 212-9531, 249-8572) (49) Gauge port for the stroking pressure "X1" (50) Pressure port for pilot pressure "Y1" (52) Return port for the charge pump "Fa" (53) Discharge port (56) Pressure port for pilot pressure "Y2" (57) Gauge port for the stroking pressure "X2" (60) Adjustment screw for the crossover relief valve (61) Gauge port for the system pressure "Mb" (63) Adjustment screw for the crossover relief valve (64) Gauge port for the system pressure "Ma" (66) Case drain port (67) Gauge port for the control pressure "Ps" (68) Discharge port for the charge pump supply "Fe" (70) Suction port for the charge pump supply "S" (71) Discharge port

Illustration 10	g02618537
Hydraulic Schematic for pumps with a charge pump, high-pressure cut valve, and internal charge pressure relief valve (Pump Numbers: 271-2114, 257-8470, 222-1214, 191-9535, 179-2792, 178-4415, 139-4151, 421-1808, 9T-8342, 6E-1661) (49) Gauge port for the stroking pressure "X1" (50) Pressure port for pilot pressure "Y1" (52) Return port for the charge pump "Fa" (53) Discharge port (56) Pressure port for pilot pressure "Y2" (57) Gauge port for the stroking pressure "X2" (59) Adjustment screw for the high-pressure cut (if equipped) (60) Adjustment screw for the crossover relief valve (61) Gauge port for the system pressure "Mb" (62) Adjustment screw for the charge pressure relief valve (if equipped) (63) Adjustment screw for the crossover relief valve (64) Gauge port for the system pressure "Ma" (65) Gauge port for the charge pressure "G" (66) Case drain port (67) Gauge port for the control pressure "Ps" (68) Discharge port for the charge pump supply "Fe" (69) Gauge port for the high-pressure balance (if applicable) (70) Suction port for the charge pump supply "S" (71) Discharge port

Illustration 11	g02618701
Hydraulic Schematic for pumps with a charge pump and high-pressure cut valve (Pump Numbers: 269-7844, 269-7843, 240-3321, 240-3305) (49) Gauge port for the stroking pressure "X1" (50) Pressure port for pilot pressure "Y1" (52) Return port for the charge pump "Fa" (53) Discharge port (56) Pressure port for pilot pressure "Y2" (57) Gauge port for the stroking pressure "X2" (59) Adjustment screw for the high-pressure cut (if equipped) (60) Adjustment screw for the crossover relief valve (61) Gauge port for the system pressure "Mb" (63) Adjustment screw for the crossover relief valve (64) Gauge port for the system pressure "Ma" (65) Gauge port for the charge pressure "G" (66) Case drain port (67) Gauge port for the control pressure "Ps" (68) Discharge port for the charge pump supply "Fe" (69) Gauge port for the high-pressure balance (if applicable) (70) Suction port for the charge pump supply "S" (71) Discharge port

Illustration 12	g01355006
Hydraulic Schematic for pumps with a high-pressure cut valve and no internal charge pressure relief valve. (Pump Number: 140-9471) (49) Gauge port for the stroking pressure "X1" (50) Pressure port for pilot pressure "Y1" (53) Discharge port (56) Pressure port for pilot pressure "Y2" (57) Gauge port for the stroking pressure "X2" (59) Adjustment screw for the high-pressure cut (if equipped) (60) Adjustment screw for the crossover relief valve (61) Gauge port for the system pressure "Mb" (63) Adjustment screw for the crossover relief valve (64) Gauge port for the system pressure "Ma" (65) Gauge port for the charge pressure "G" (66) Case drain port (67) Gauge port for the control pressure "Ps" (70) Suction port for the charge pump supply "S" (71) Discharge port

Illustration 13	g02618736
Hydraulic Schematic for pumps with a high-pressure cut valve and no internal charge pressure relief valve. (Pump Number: 355-2392, 355-2393) (49) Gauge port for the stroking pressure "X1" (50) Pressure port for pilot pressure "Y1" (52) Return port for the charge pump "Fa" (53) Discharge port (56) Pressure port for pilot pressure "Y2" (57) Gauge port for the stroking pressure "X2" (59) Adjustment screw for the high-pressure cut (if equipped) (60) Adjustment screw for the crossover relief valve (61) Gauge port for the system pressure "Mb" (63) Adjustment screw for the crossover relief valve (64) Gauge port for the system pressure "Ma" (65) Gauge port for the charge pressure "G" (66) Case drain port (67) Gauge port for the control pressure "Ps" (68) Discharge port for the charge pump supply "Fe" (69) Gauge port for the high-pressure balance (if applicable) (70) Suction port for the charge pump supply "S" (71) Discharge port

Remote Pressure Relief Valve

Note: The remote pressure relief valve is used in order to regulate charge pressure on pumps that do not have internal charge pressure relief valves. Those pumps include 129-5348, 169-4664, 169-4665, 170-3608, 204-9765, 212-9531, 228-7585, 228-7586, 230-7333, 240-3305, 240-3321, 249-8572, 269-7843, 269-7844, 355-2392, and 355-2393.

Illustration 14	g01747994
(72) Return to Pump (73) Tee (74) Pressure gauge port (75) From Pump (76) Tee (77) Inlet from Pump (78) 120-9181 Body (79) Adjustment Screw for the Remote Pressure Relief Valve (80) 4C-4014 Relief Valve Cartridge (81) Return to Tank

9U-5902 Rectifier Block

Illustration 15	g01748376
9U-5902 Rectifier Block Connections

Illustration 16	g01748377
9U-5902 Rectifier Block Schematic (82) High-pressure port (83) High-pressure outlet (84) Low-pressure inlet (85) High-pressure port

9U-5893 Heat Exchanger

Illustration 17	g01748383
9U-5893 Heat Exchanger Connections (86) Inlet (87) Outlet (88) Water inlet (89) Water outlet

198-4240 Electric Pressure Gauge Group

Illustration 18	g01748393
198-4240 Electric Pressure Gauge Group Connections (90) Pressure Gauge (91) Red Transducer 34500 kPa (5000 psi) (92) 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: Be sure that all hoses and fittings are rated XT-6ES.

1. Install pressure taps in the following test ports:

   Refer to Illustration 7.

   (49) Gauge port for the stroking pressure "X1"

   (50) Pressure port for the pilot pressure "Y1"

   (56) Pressure port for the pilot pressure "Y2"

   (57) Gauge port for the stroking pressure "X2"

   (61) Gauge port for the system pressure "Mb"

   (64) Gauge port for the system pressure "Ma"

   (65) Gauge port for the charge pressure "G"

   (67) Gauge port for the control pressure "Ps"

   (69) Gauge port for the high pressure (if applicable)

2. Connect a pressure gauge 8T-0856 to the pressure tap on the gauge port for the control pressure "Ps" (67).

3. Connect a pressure gauge 8T-0856 to the pressure tap on the gauge port for the charge pressure "G" (65).

4. Connect discharge ports (53) and (71) to the 9U-5902 Rectifier Block high-pressure ports (82) and (85), respectively.

5. Connect the 9U-5902 Rectifier Block outlet (83) to the flow meter inlet on the test bench.

6. Connect the outlet of the flow meter for the test bench to the 9U-5398 Heat Exchanger inlet (86) .

7. Connect the 9U-5398 Heat Exchanger outlet (87) to the low-pressure return (84) on the 9U-5902 Rectifier Block.

8. Connect the red transducer 34500 kPa (5000 psi) (91) or 8T-0860 Pressure Gauge to the discharge pressure ports (61) and (64) .

9. This style of pump has two possible types of charge relief valves. Visual inspection of the pump will not dictate the location of the relief valve. Some pumps have internal relief valves. Some pumps have an external relief valve. The adjustment screw for the charge pressure relief valve (62) could be present on either type of pump body. Internal blocking of the adjustment screw is used for an application of an external charge relief valve. Refer to the part number off the pump in the section of test specification of this document to find out if the pump is equipped with an internal relief valve or the pump is equipped with an external charge relief valve. The following information explains the hose connections for each style.

   Internal - Connect a hose between the discharge port for the charge pump "Fe" (68) and the return port for the charge pump "Fa" (52).

   External - A remote pressure relief valve must be used. Refer to Illustration 14 in order to view the remote pressure relief valve. Connect a hose between the discharge port for the charge pump "Fe" (68) and one side of the tee (76). Connect another side of the tee (76) to the high-pressure inlet (77) on (78) 120-9181 Body.Connect one side of tee (73) to tee (76). Connect pressure tap (74) to tee (73). Connect one end of a hose to the return inlet port for the charge pump "Fa" (52). Connect the other end of the hose to the remaining opening (72) on tee (73).

10. Connect the suction port for the charge pump "S" (70) to the test bench oil supply.

    Note: Not all pumps have internal charge pumps. If you do not have an internal charge pump, supply auxiliary oil to the suction port for the charge pump supply "S" (70).

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 a case drain port until the case is full.

13. Connect a hose to the case drain port (66). Direct the other end of the hose back to the tank.

14. 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.

Mechanical Zero

1. Vent the ports for the stroking pressure (49) and (57) to the atmosphere. Venting will equalize the pressure on the servo spool. The red transducer or the pressure gauges should already be installed on the gauge ports for the system pressure (61) and (64). Turn the load control on the test bench completely "clockwise" for the discharge pressure. A discharge pressure higher than charge pressure may occur if the mechanical zero adjustment is incorrect.

2. Start rotating the pump at the value in Step 1 of the "Test Specifications". Turn the adjustment screw for the mechanical zero (58) clockwise until pressure increases on one of the gauge ports of the system pressure (61) or (64). Continue to turn until a pressure of 200 psi above charge pressure is achieved. Mark the position "one" of the adjustment screw for the mechanical zero (58) on the pump body.

3. Turn adjustment screw for the mechanical zero (58) counterclockwise until pressure increases on the other gauge port for the system pressure (61) or (64). Mark the position "two" of the adjustment screw for the mechanical zero (58).

4. A mark should be placed halfway between position "one" and position "two". Turn the adjustment screw for the mechanical zero (58) to the midpoint of both marks. There should be less than a 34.5 kPa (5 psi) pressure differential between both gauge ports for the system pressure (61) and (64).

5. Stop rotating the pump. Turn the load control for pump discharge pressure "counterclockwise". Allow all the pressure in the pump to dissipate. Disconnect the pressure gauges from the gauge ports for the system pressure (61) and (64).

Hydraulic Zero

1. Connect a blue transducer, 3450 kPa (500 psi)or 6000 kPa (870 psi) 8T-0856 Pressure Gauges to gauge port for the stroking pressure (49) and (57).

2. Start rotating the pump according to the RPM in Step 1 of the "Test Specifications". Turn the load control on the test bench completely "clockwise" for the discharge pressure. A discharge pressure higher than charge pressure may occur if the hydraulic zero position adjustment is incorrect.

3. Turn the adjustment screw for the hydraulic zero (54) clockwise or counterclockwise. Turn the adjustment screw until pressure on the gauge ports for the stroking pressure (49) and (57) differ by less than 21 kPa (3 psi).

   Note: Do NOT turn the adjustment screw for the hydraulic zero (54) more than 90 degrees in one direction.

4. Turn the load control for the pump discharge pressure "counterclockwise". Allow pump discharge pressure to decrease. Stop rotating the pump. Allow pump pressure to dissipate.

Setting the Control

1. Connect a pressure gauge on the gauge port for the stroking pressure "X1" (49). Connect a pressure gauge on the gauge port for the stroking pressure "X2" (57).

2. Apply 300 kPa (43.5 psi) to the pressure port for the pilot pressure "Y2" (56). As this is done, one of the gauge ports (49) or (57) will show an increase in pressure. Focus on the gauge port with the lower pressure (49) or (57). Turn the adjustment set screw for the servo control (51) until the pressure increases between 100 - 150 kPa (14.5 - 21.5 psi). The pressure should increase on the gauge port with the lower pressure (49) or (57). Record the pressure readings at both gauge ports (49) and (57).

3. Lock the adjustment screw for the servo control (51) with 45 Nm (33 ft/lb). Be careful not to over-tighten the adjustment screw. Stroke the pump several times by alternating the pilot pressure from port (50) to port (56). This ensures that the set washer is fully seated. View the gauge ports (49) and (57). Turn the adjustment set screw for the servo control (51) until the lower pressure gauge port (49) or (57) is the same value as the recorded value from Step 2.

4. After setting the value for "Y1", follow these steps for adjusting the value of "Y2". Connect a pressure gauge on the gauge ports for the stroking pressure "X1" (49). Connect a pressure gauge on the gauge ports for the stroking pressure "X2" (50).

5. Apply 300 kPa (43.5 psi) to signal pressure port "Y1" (50). As this is done, one of the port "X" gauges will show an increase in pressure. Watch the port gauge "X" with the lower pressure. Turn in the adjustment set screw (55) on the"Y2" side until port gauge "X" with the lower pressure changes between 100 - 150 kPa (14.5 - 21.5 psi). Record the pressure readings at both "X" ports.

6. Lock the "Y2" side set screw (55) with locknut at 45 Nm (33 ft/lb). Be careful not to overtighten the locknut. Stroke the pump several times by alternating pressure from "Y1" (50) and "Y2" (56). This ensures that the set washer is fully seated. Apply 300 kPa (43.5 psi) to port "Y1" (50). View the port gauges "X" (49). Adjust the "Y2" side set screw (55) until the lower port pressure "X" is the same value as the recorded value from Step 4 of the Test Procedure.

   Note: You cannot adjust the "Begin of Control". You can only verify that "Begin of Control" is correct.

Test Procedure

Note: The steps in the procedure correlate with the steps in the table for the test specification according to your specific part number.

The hydraulic oil in the test bench should meet an ISO rating of 16/13. 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)

Note: The steps in the procedure correlate with the steps in the Test Specification tables according to your specific part number.

1. Connect control pressure from the test bench to the pressure port for the pilot pressure "Y1" (50). Vent pressure port (56) to the atmosphere. Start rotating the pump according to the RPM in Step 1 of the Test Specifications. Verify that the value for the charge relief valve is properly set. Auxiliary oil flow specifications are stated in the "Test Specifications" section of this document. Be sure to sustain the correct charge relief pressure in Steps 1 through 5 of the "Test Specifications". Sustaining the pressure may require the increase or decrease of the auxiliary oil supply flow to port (70).

2. Slowly increase the pump RPM to the value in Step 2 of the Test Specifications. Increase the signal pressure to the value in Step 2 of the Test Specifications to the signal pressure port (50). This is the point of upstroke for the pump. If the actual discharge flow is not correct, the pump or control for the signal pressure may not be mechanically feasible. Refer to Illustration 19.

   Note: Some flow meters may not be able to read discharge flows at this level. If the flow is not measurable on the flow meter, increase the signal pressure to a value higher than the value in Step 2 of the Test Specifications. Continue increasing the pressure until the flow can be measured by the flow meter.

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   Illustration 19	g01364299
   Control (Q) Pump discharge flow (R) Signal pressure (1) Beginning of the stroke (2) End of full stroke

3. Increase the signal pressure to the value in Step 3 of the "Test Specifications". The signal pressure in Step 3 should initiate maximum pump displacement. Fully upstroke the pump at this time. Record the actual discharge flow. The discharge flow should agree with the value in Step 3 of the "Test Specifications". Refer to Illustration 19. If the actual flow is not equal to the value in Step 3 of the "Test Specifications", then the pump or the control may not be mechanically feasible.

   Note: For pumps 240-3305, 240-3321, 269-7843, 355-2392, and 355-2393 one of the crossover relief valves is set lower than the discharge pressure required to check the efficiency of the pump (Step 4 of the Test Procedure) and to check the high-pressure cut (Step 5 of the Test Procedure). If the discharge pressure required in the Test Specifications cannot be reached, perform Step 4 and Step 5 of the Test Procedure with the opposite pressure port for pilot pressure (50) or (56) supplied with pilot pressure.

4. Step 4 will measure the pump efficiency. Increase pump discharge pressure to the value in Step 4 of the Test Specifications. Record the discharge flow. Calculate the total loss. If the total loss is higher than the allowable value in Step 4 of the Test Specifications, the pump may not be mechanically feasible.

   Subtract the value of the "discharge flow" in Step 4 of the Test Procedure from the value of the "discharge flow" in Step 3 of the Test Procedure. The result is your total loss. Refer to Illustration 20.

   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.

   Note: For pumps 240-3305, 240-3321, 269-7843, 355-2392, and 355-2393 one of the crossover relief valves is set lower than the discharge pressure required to check the efficiency of the pump (Step 4 of the Test Procedure) and to check the high-pressure cut (Step 5 of the Test Procedure). If the discharge pressure required in the Test Specifications cannot be reached, perform Step 4 and Step 5 of the Test Procedure with the opposite pressure port for pilot pressure (50) or (56) supplied with pilot pressure.

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   Illustration 20	g01355260
   Pump Characteristics (Q) Pump discharge flow (R) Discharge pressure (3) Maximum discharge flow with minimum discharge pressure (4) Maximum discharge flow with maximum discharge pressure (X) Volumetric Efficiency (pump 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. Step 5 of the Test Procedure will verify the high-pressure cut. Slowly increase the discharge pressure according to Step 5 of the "Test Specifications". The pressure on the gauge port for the control pressure "Ps" (67) should decrease. The pump flow should decrease to the value in Step 5 of the "Test Specifications".

   If the actual discharge pressure is not within the specifications, turn the adjustment screw for the high pressure cut (59) accordingly. The discharge pressure should equal the value in Step 5 of the "Test Specifications".

   Note: The crossover relief valves will not be tested because of the extreme pressures.

   Reduce RPM and all pressures to zero. Remove the component from the test bench. Drain the oil from the pump. Plug all of the ports.

   Connect the pilot pressure from the test bench to the pressure port for the pilot pressure (56). Vent pressure port (50) to the atmosphere. Repeat Steps 2 through 5 of the "Test Procedure".

Show/hide table

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

Test Specifications

Table 3

Part Number	6E-1661(1)
Pump Rotation	Bi-directional
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2750 (400)(2)	2750 (400)(2)	2750 (400)(2)	20000 (2900)	40000 (5800)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)	-
Charge Pressure kPa (psi)	2750 (400) (internal)	2750 (400)	2750 (400)	2750 (400)	2750 (400)
Charge Flow lpm (gpm)	20 (5)	45 (12)	45 (12)	45 (12)	45 (12)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all hoses and fitting are rated XT6-ES in this Step

Table 4

Part Number	9T-8342(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600 (90)	1800 (260)	1800 (260)	1800 (260)
Discharge Pressure kPa (psi)	2300 (335)(2)	2300 (335)(2)	2300 (335)(2)	20000 (2900)	40000 (5800)(3)
Discharge Flow lpm (gpm)	0	1 (.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)	-
Charge Pressure kPa (psi)	2300 (335)	2300 (335)	2300 (335)	2300 (335)	2300 (335)
Charge Flow lpm (gpm)	21 (6)	48 (13)	48 (13)	48 (13)	48 (13)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all hoses and fitting are rated XT6-ES in this Step

Table 5

Part Number	129-5348(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	Step 5 does not apply to this part number
Signal Pressure kPa (psi)	0	270 (39)	800±50 (116±7)	800±50 (116±7)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000 (2900)
Discharge Flow lpm (gpm)	0	1 (0.26)	162 (43)	162 (43)
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			7 (2)
Charge Pressure kPa (psi)	2850 (413) (external)	2850 (413)	2850 (413)	2850 (413)
Charge Flow lpm (gpm)	20 (5.3)	45 (12)	45 (12)	45 (12)

(1)	(See Illustration 8)
(2)	Discharge pressure equals charge pressure

Table 6

Part Number	139-4151(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2750 (400)(2)	2750 (400)(2)	2750 (400)(2)	20000 (2900)	41000 (5950)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)	-
Charge Pressure kPa (psi)	2750 (400) (internal)	2750 (400)	2750 (400)	2750 (400)	2750 (400)
Charge Flow lpm (gpm)	23 (6)	51 (14)	51 (14)	51 (14)	51 (14)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all hoses and fitting are rated XT-6ES in this Step

Table 7

Part Number	140-9471(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000 (2900)	41400 (6000)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	101 (26)	101 (26)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			5 (1)	-
Charge Pressure kPa (psi)	The charge pump is not located inside main pump. Supply auxiliary charge oil from the test bench. Increase flow from test bench auxiliary oil supply until the value of pressure in the charge circuit reaches 2850 kPa (413 psi).
Charge Flow lpm (gpm)

(1)	(See Illustration 12)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 8

Part Number	169-4664(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	Step 5 does not apply to this part number
Signal Pressure kPa (psi)	0	270 (39)	800±50 (116±7)	800±50 (116±7)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000 (2900)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)
Charge Pressure kPa (psi)	2850 (413) (external)	2850 (413)	2850 (413)	2850 (413)
Charge Flow lpm (gpm)	32 (8)	72 (19)	72 (19)	72 (19)

(1)	(See Illustration 9)
(2)	Discharge pressure equals charge pressure

Table 9

Part Number	169-4665
Pump Rotation	CCW
Canceled Replaced by 170-3608

Table 10

Part Number	170-3608(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	Step 5 does not apply to this part number
Signal Pressure kPa (psi)	0	270 (39)	800±50 (116±7)	800±50 (116±7)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000 (2900)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)
Charge Pressure kPa (psi)	2850 (413) (external)	2850 (413)	2850 (413)	2850 (413)
Charge Flow lpm (gpm)	32 (8)	72 (19)	72 (19)	72 (19)

(1)	(See Illustration 9)
(2)	Discharge pressure equals charge pressure

Table 11

Part Number	178-4415(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±14.5)	1800±100 (261±14.5)	1800±100 (261±14.5)
Discharge Pressure kPa (psi)	2500±100 (363±15)(2)	2500±100 (363±15)(2)	2500±100 (363±15)(2)	20000±100 (2900±15)	41000±1000 (5950±150)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	72 (19)	72 (19)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			3 (1)	-
Charge Pressure kPa (psi)	The charge relief valve is internal, but nonadjustable. Increase speed to 2400 RPM. Charge pump pressure should be 2500±100 (363±15).
Charge Flow lpm (gpm)	7 (2)	15 (4)	15 (4)	15 (4)	15 (4)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 12

Part Number	179-2792(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±14.5)	1800±100 (261±14.5)	1800±100 (261±14.5)
Discharge Pressure kPa (psi)	3000±250 (440±40)(2)	3000±250 (440±40)(2)	3000±250 (440±40)(2)	20000±100 (2900±15)	40000±750 (5800±110)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	162 (43)	162 (43)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			7 (2)	-
Charge Pressure kPa (psi)	3000±250 (440±40)	3000±250 (440±40)	3000±250 (440±40)	3000±250 (440±40)	3000±250 (440±40)
Charge Flow lpm (gpm)	16 (4)	35 (9)	35 (9)	35 (9)	35 (9)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hose are rated XT-6ES in this Step

Table 13

Part Number	191-9535(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2500±300 (363±44)(2)	2500±300 (363±44)(2)	2500±300 (363±44)(2)	20000±100 (2900±15)	42000±1000 (6000±150)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	101 (27)	101 (27)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			5 (1)	-
Charge Pressure kPa (psi)	2500±300 (360±44) (internal)	2500±300 (360±44)	2500±300 (360±44)	2500±300 (360±44)	2500±300 (360±44)
Charge Flow lpm (gpm)	16 (4)	35 (9)	35 (9)	35 (9)	35 (9)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 14

Part Number	204-9765
Pump Rotation	CCW
Canceled Replaced by 170-3608

Table 15

Part Number	212-9531(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	Step 5 does not apply to this part number
Signal Pressure kPa (psi)	0	270 (39)	800±50 (116±7)	800±50 (116±7)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000±100 (2900±15)
Discharge Flow lpm (gpm)	0	1 (0.26)	162 (43)	162 (43)
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			7 (2)
Charge Pressure kPa (psi)	2850 (413) (external)	2850 (413)	2850 (413)	2850 (413)
Charge Flow lpm (gpm)	20 (5)	45 (12)	45 (12)	45 (12)

(1)	(See Illustration 9)
(2)	Discharge pressure equals charge pressure

Table 16

Part Number	222-1214(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2500±300 (363±43)	2500±300 (363±43)	2500±300 (363±43)	20000±100 (2900±15)	42000±1500 (6000±220)(2)
Discharge Flow lpm (gpm)	0	1 (0.26)	100 (27)	100 (27)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			5 (1)	-
Charge Pressure kPa (psi)	2500±300 (360±45) (internal)	2500±300 (360±45)	2500±300 (360±45)	2500±300 (360±45)	2500±300 (360±45)
Charge Flow lpm (gpm)	16 (4)	35 (9)	35 (9)	35 (9)	35 (9)

(1)	(See Illustration 10)
(2)	Be sure that all fittings and hoses are rated XT-6EX in this Step

Table 17

Part Number	228-7585(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	Step 5 does not apply to this part number
Signal Pressure kPa (psi)	0	270 (39)	800±50 (116±7)	800±50 (116±7)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000±100 (2900±15)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)
Charge Pressure kPa (psi)	2850 (413) (external)	2850 (413)	2850 (413)	2850 (413)
Charge Flow lpm (gpm)	32 (8)	72 (19)	72 (19)	72 (19)

(1)	(See Illustration 9)
(2)	Discharge pressure equals charge pressure

Table 18

Part Number	228-7586
Pump Rotation	CCW
Canceled Replaced by 230-7333

Table 19

Part Number	230-7333(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	Step 5 does not apply to this part number
Signal Pressure kPa (psi)	0	270 (39)	800±50 (116±7)	800±50 (116±7)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000±100 (2900±15)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)
Charge Pressure kPa (psi)	2850 (413) (external)	2850 (413)	2850 (413)	2850 (413)
Charge Flow lpm (gpm)	32 (8)	72 (19)	72 (19)	72 (19)

(1)	(See Illustration 9)
(2)	Discharge pressure equals charge pressure

Table 20

Part Number	240-3305(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2750 (400)(2)	2750 (400)(2)	2750 (400)(2)	20000±100 (2900±15)	42000±1500 (6000±220)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)	-
Charge Pressure kPa (psi)	2750 (400) (internal)	2750 (400)	2750 (400)	2750 (400)	2750 (400)
Charge Flow lpm (gpm)	23 (6)	51 (14)	51 (14)	51 (14)	51 (14)

(1)	(See Illustration 11)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6EX in this Step

Table 21

Part Number	240-3321(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2750 (400)(2)	2750 (400)(2)	2750 (400)(2)	20000±100 (2900±15)	42000±1500 (6000±220)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)	-
Charge Pressure kPa (psi)	2750 (400) (internal)	2750 (400)	2750 (400)	2750 (400)	2750 (400)
Charge Flow lpm (gpm)	23 (6)	51 (14)	51 (14)	51 (14)	51 (14)

(1)	(See Illustration 11)
(2)	Discharge equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6EX in this Step

Table 22

Part Number	249-8572(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	Step 5 does not apply to this part number
Signal Pressure kPa (psi)	0	270 (39)	800 (116)	800±50 (116±7)
Discharge Pressure kPa (psi)	2850 (413)(2)	2850 (413)(2)	2850 (413)(2)	20000±100 (2900±15)
Discharge Flow lpm (gpm)	0	1 (0.26)	162 (43)	162 (43)
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			7 (2)
Charge Pressure kPa (psi)	2850 (413) (external)	2850 (413)	2850 (413)	2850 (413)
Charge Flow lpm (gpm)	20 (5.3)	45 (12)	45 (12)	45 (12)

(1)	(See Illustration 9)
(2)	Discharge pressure equals charge pressure

Table 23

Part Number	257-8470(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80(87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2500(413)(2)	2500(413)(2)	2500(413)(2)	20000±100 (2900±15)	42000±1500 (6000±220)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	101 (27)	101 (27)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			5 (1)	-
Charge Pressure kPa (psi)	2500 (363) (external)	2500(363)	2500(363)	2500 (363)	2500 (363)
Charge Flow lpm (gpm)	12.4 (3.3)	28 (7.4)	28 (7.4)	28 (7.4)	28 (7.4)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6EX in this Step

Table 24

Part Number	269-7843(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80(87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2760±100 (400±15)(2)	2760±100 (400±15)(2)	2760±100 (400±15)(2)	20000±100 (2900±15)	42000±1500 (6000±220)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)	-
Charge Pressure kPa (psi)	2760±100 (400±15)	2760±100 (400±15)	2760±100 (400±15)	2760±100 (400±15)	2760±100 (400±15)
Charge Flow lpm (gpm)	23 (6)	51 (13)	51 (13)	51 (13)	51 (13)

(1)	(See Illustration 11)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6EX in this Step

Table 25

Part Number	269-7844(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80(87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2760±100 (400±15)(2)	2760±100 (400±15)(2)	2760±100 (400±15)(2)	20000±100 (2900±15)	42000±1500 (6000±220)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			10 (3)	-
Charge Pressure kPa (psi)	2760±100 (400±15)	2760±100 (400±15)	2760±100 (400±15)	2760±100 (400±15)	2760±100 (400±15)
Charge Flow lpm (gpm)	23 (6)	51 (13)	51 (13)	51 (13)	51 (13)

(1)	(See Illustration 11)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 26

Part Number	271-2114(1)
Pump Rotation	CCW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80(87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	3150±250 (460±40)(2)	3150±250 (460±40)(2)	3150±250 (460±40)(2)	20000±100 (2900±15)	39000±250 (5660±150)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	128 (34)	128 (34)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			6 (2)	-
Charge Pressure kPa (psi)	3150±250 (460±40)	3150±250 (460±40)	3150±250 (460±40)	3150±250 (460±40)	3150±250 (460±40)
Charge Flow lpm (gpm)	16 (4)	35 (9)	35 (9)	35 (9)	35 (9)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 27

Part Number	355-2391
Tandem pump consisting of 355-2392 (this document) and 355-2393 (this document).

Table 28

Part Number	355-2392(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	4000±150 (580±22)(2)	4000±150 (580±22)(2)	4000±150 (580±22)(2)	20000 (2900)	42,000±1000 (6,090±145)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			11 (3)	-
Charge Pressure kPa (psi)	The charge pump is not located inside main pump. Supply auxiliary charge oil from the test bench. Increase flow from test bench auxiliary oil supply until the value of pressure in the charge circuit reaches 4000±150 kPa (580±22 psi).
Charge Flow lpm (gpm)

(1)	(See Illustration 13)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 29

Part Number	355-2393(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	4000±150 (580±22)(2)	4000±150 (580±22)(2)	4000±150 (580±22)(2)	20000 (2900)	42,000±1000 (6,090±145)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			11 (3)	-
Charge Pressure kPa (psi)	The charge pump is not located inside main pump. Supply auxiliary charge oil from the test bench. Increase flow from test bench auxiliary oil supply until the value of pressure in the charge circuit reaches 4000±150 kPa (580±22 psi).
Charge Flow lpm (gpm)

(1)	(See Illustration 13)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 30

Part Number	421-1808(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1800	1800	1800	1800
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2750±140 (399±20)(2)	2750±140 (399±20)(2)	2750±140 (399±20)(2)	20000 (2900)	41000±1000 (5950±145)(3)
Discharge Flow lpm (gpm)	0	1 (0.26)	225 (59)	225 (59)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			11 (3)	-
Charge Pressure kPa (psi)	2750±140 (399±20)	2750±140 (399±20)	2750±140 (399±20)	2750±140 (399±20)	2750±140 (399±20)
Charge Flow lpm (gpm)	22.6 (5.9)	50.4 (13.3)	50.4 (13.3)	50.4 (13.3)	50.4 (13.3)

(1)	(See Illustration 10)
(2)	Discharge pressure equals charge pressure
(3)	Be sure that all fittings and hoses are rated XT-6ES in this Step

Table 31

Part Number	465-2615(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1400	1400	1400	1400
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2800±100 (410±20)(2)	2800±100 (410±20)(2)	2800±100 (410±20)(2)	31050 (4500)	34,500±1000 (5000±140)
Discharge Flow lpm (gpm)	0	1 (0.26)	252 (66)	252 (66)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			18 (5)	-
Charge Pressure kPa (psi)	2800±100 (410±20)(2)	2800±100 (410±20)(2)	2800±100 (410±20)(2)	2800±100 (410±20)(2)	2800±100 (410±20)(2)
Charge Flow lpm (gpm)	29 (7.5)	51 (13)	51 (13)	51 (13)	51 (13)

(1)	(See Illustration 11)
(2)	Discharge pressure equals charge pressure

Table 32

Part Number	474-2257(1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1400	1400	1400	1400
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	31050 (4500)	34,500±1000 (5000±140)
Discharge Flow lpm (gpm)	0	1 (0.26)	175 (45)	175 (45)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			13 (3.5)	-
Charge Pressure kPa (psi)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)
Charge Flow lpm (gpm)	28.3 (7.5)	39.5 (10.5)	39.5 (10.5)	39.5 (10.5)	39.5 (10.5)

(1)	(See Illustration 11)
(2)	Discharge pressure equals charge pressure

Table 33

Part Number	480-2313 (1)
Pump Rotation	CW
Step	1	2	3	4	5
RPM	800	1400	1400	1400	1400
Signal Pressure kPa (psi)	0	600±80 (87±12)	1800±100 (261±15)	1800±100 (261±15)	1800±100 (261±15)
Discharge Pressure kPa (psi)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	31050 (4500)	34,500±1000 (5000±140)
Discharge Flow lpm (gpm)	0	1 (0.26)	175 (45)	175 (45)	0
Pump Loss lpm (gpm)	Subtract the recorded discharge flow in Step 4 from the discharge flow recorded in Step 3. The result is the total loss. Refer to Illustration 20			13 (3.5)	-
Charge Pressure kPa (psi)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)	2400±100 (350±20)(2)
Charge Flow lpm (gpm)	28.3 (7.5)	39.5 (10.5)	39.5 (10.5)	39.5 (10.5)	39.5 (10.5)

(1)	(See Illustration 11)
(2)	Discharge pressure equals charge pressure

Tooling

Table 34

Tooling
Pump Number	6E-1661	9T-8342	129-5348	139-4151	140-9471
Stroking Pressure Ports	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	7/16-20 UNF
Signal Pressure Ports	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18 UNF
Pump Discharge Pressure Ports (gage)	7/16-20 UNF	9/16-18UNF	7/16-20UNF	7/16-20UNF	7/16-20 UNF
Case Drain Port	1-5/16-12UN	1-5/16-12UN	1-1/16-12UNF	1-5/16-12UN	1-1/16-12 UNF
Charge Suction	1-7/8-12UN	1-7/8-12UN	1-5/8-12UNF	1-7/8-12UN	1-5/16-12 UNF
Charge Pump Discharge Port	1-1/16-12UNF	7/8-14UNF	1-1/16-12UNF	7/8-14UNF
Charge Pump Return Port	7/8-14UNF	7/8-14UNF	7/8-14UNF	1-1/16-12UNF	3/4-16 UNF
Split Flange	2T-3001		124-4288	2-3001	8T-9403
Flange Adapter	9U-7440	9U-7440	9U-7439	9U-7440	9U-7438
Mounting Plate	1U-9129	131-8683	1U-9129	1U-9129	1U-9128
Drive Adapter	1U-9394	1U-9394	1U-3598	1U-9394	133-2329

Table 35

Tooling
Pump Number	169-4664	170-3608	178-4415	179-2792	191-9535
Stroking Pressure Ports	9/16-18UNF	9/16-18UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF
Signal Pressure Ports	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF
Pump Discharge Pressure Ports (gage)	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF
Case Drain Port	1-5/16-12UN	1-5/16-12UN	7/8-14UN	1-1/16-12UNF	1-1/16-12UNF
Charge Suction	1-5/8-12UN	1-7/8-12UN	1-5/16-12UN	1-5/8-12UN	1-5/8-12UN
Charge Pump Discharge Port	7/8-14UNF	7/8-14UNF	3/4-16UNF	7/8-14UNF	7/8-14UNF
Charge Pump Return Port	1-1/16-12UNF	1-1/16-12UNF	3/4-16UNF	7/8-14UNF	1-1/16-12UNF
Split Flange	2T-3001	2T-3001	124-4287	1P-5766	124-4288
Flange Adapter	9U-7440	9U-7440	9U-7438	9U-7440	9U7439
Mounting Plate	1U-9129	1U-9129	1U-9128	1U-9128	1U-9128
Drive Adapter	1U-3598	1U-3598	1U-9834	1U-9834	133-2329

Table 36

Tooling
Pump Number	212-9531	222-1214	228-7585	230-7333	240-3305
Stroking Pressure Ports	9/16-18UNF	7/16-20UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF
Signal Pressure Ports	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF
Pump Discharge Pressure Ports (gage)	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF
Case Drain Port	1-1/16-12UN	1-1/16-12UN	1-5/16-12UN	1-5/16-12UN	1-5/16-12UN
Charge Suction	1-5/8-12UN	1-5/8-12UN	1-5/8-12UN	1-7/8-12UN	1-7/8-12UN
Charge Pump Discharge Port	1-1/16-12UNF	7/8-14UNF	7/8-14UNF	7/8-14UNF	7/8-14UNF
Charge Pump Return Port	7/8-14UNF	1-1/16-12 UNUNF	1-1/16-12UNF	1-1/16-12UNF	1-1/16-12UNF
Split Flange	124-4288	1P-5766	1P-5767	1P-5767	2T-3001
Flange Adapter	9U-7439	9U-7439	9U-7440	9U-7440	9U-7440
Mounting Plate	1U-9129	1U-9128	1U-9129	1U-9129	1U-9129
Drive Adapter	1U-3598	133-2329	1U-9835	1U-9835	1U-9394

Table 37

Tooling
Pump Number	240-3321	249-8572	257-8470	269-7843	269-7844	271-2114
Stroking Pressure Ports	9/16-18UNF	9/16-18UNF	7/16-20UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF
Signal Pressure Ports	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF
Pump Discharge Pressure Ports (gage)	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF
Case Drain Port	1-5/16-12UN	1-1/16-12UN	1-1/16-12UN	1-1/16-12UN	1-5/16-12UN	1-1/16-12UN
Charge Suction	1-7/8-12UN	1-5/8-12UN	1-5/8-12UN	1-7/8-12UN	1-7/8-12UN	1-5/8-12UN
Charge Pump Discharge Port	7/8-14UNF	1-1/16-12UNF	3/4-16 UNF	1-5/16-12UNF	1-5/16-12UNF	1-1/16-12UNF
Charge Pump Return Port	1-1/16-12UNF	7/8-14UNF	3/4-16 UNF	1-5/16-12UNF	1-5/16-12UNF	7/8-14UNF
Split Flange	2T-3001	124-4288	1P-5766	1P-5767	1P-5767	1P-5766
Flange Adapter	9U-7440	9U-7439	9U-7443	9U-7439	9U-7439	1P-5766
Mounting Plate	1U-9129	1U-9129	1U-9129	131-8683	131-8683	1U-9128
Drive Adapter	1U-9394	1U-9835	133-2329	1U-9835	1U-9835	133-2329

Table 38

Tooling
Pump Number	355-2391	355-2392	355-2393	421-1808	465-2615	474-2257	480-2313
Stroking Pressure Ports	Tandem pump consisting of 355-2392 (this document) and 355-2393 (this document).	9/16-18UNF	9/16-18UNF	9/16-18UNF	7/16-20UNF	7/16-20UNF	7/16-20 UNF
Signal Pressure Ports		9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18UNF	9/16-18 UNF
Pump Discharge Pressure Ports (gage)		7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20UNF	7/16-20 UNF
Case Drain Port		1-5/16-12UN	1-5/16-12UN	1-5/16-12UN	1-5/16-12UN	1-5/16-12UN	1 5/16-2 UNF
Charge Suction		1-5/8-12	1-5/8-12	1-7/8-12	1-7/8-12	1-7/8-12	1-7/8-12
Charge Pump Discharge Port		M33X2-18 STOR	M33X2-18 STOR	1 1/16-12 STOR	1 5/16-12 STOR	1 5/16-12 STOR	1 5/16-12 STOR
Charge Pump Return Port		M33X2-18 STOR (Fa1) 1-5/16-12 STOR (Fa)	M33X2-18 STOR (Fa1) 1-5/16-12 STOR (Fa)	7/8-14 STOR	1 5/16-12 STOR	1 5/16-12 STOR	1 5/16-12 STOR
Split Flange		1P-5767	1P-5767	1P-5767	1P-5767	1P-5767	1P-5767
Flange Adapter		9U-7440	9U-7440	9U-7440	9U-7440	9U-7440	9U-7440
Mounting Plate		1U-9129	1U-9129	1U-9129	1U-9129	1U-9129	1U-9129
Drive Adapter		1U-9835	1U-9835	1U-9394	1U-9835	1U-9835	1U-9834