VALVE GP-FLOW CONTROL 3535936 - Caterpillar

Note: Perform the test for the drive pump and the test for the idler pump one at a time.
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Pump compartment (1) Pressure tap (delivery pressure for drive pump) (2) Pressure tap (delivery pressure for idler pump) (3) Pressure tap (power shift pressure) (4) Delivery line for drive pump (5) Delivery line for idler pump (6) Negative flow control line (drive pump) (7) Negative flow control line (idler pump)
Position the machine on level ground.
Stop the engine.
Release pressure in the hydraulic system. Refer to Testing and Adjusting, "System Pressure - Release".
Attach 311-1362 Vacuum Cap onto the hydraulic tank. Attach an air supply hose onto the assembly. Apply 276 to 414 kPa (40 to 60 psi). This procedure will pull a vacuum on the hydraulic system.
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Flow meter tool layoutTooling (D) (4) Delivery line for drive pump (5) Delivery line for idler pump (8) Seal (9) Makeup line (10) Seal (11) Elbow
Disconnect delivery line (4) from the drive pump or delivery line (5) from the idler pump.
Install seal (8) and plug (D16) to the end of the delivery line.
Assemble and install seals (D11) , elbow (D12) , adapter (D10) , seal (D4) , and fitting (D5) on the drive pump.
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Swing motor (9) Makeup line (10) Seal (11) Elbow
Disconnect makeup line (9) from elbow (11) at the swing motor.
Assemble and install seals (D14) , tee (D15) , adapter (D13) , seal (D4) , and fitting (D5) to elbow (11) at the swing motor.
Connect seal (10) and makeup line (9) to tee (D15) .
Remove 311-1362 Vacuum Cap and install the filler plug for the hydraulic tank.
Connect portable hydraulic tester (D) and test hoses between coupling assembly at the drive pump or the idler pump and coupling assembly at the swing motor.
Attach a 41,368 kPa (6,000 psi) pressure sensor to pressure tap (1) for delivery pressure of the drive pump. Attach a 41,368 kPa (6,000 psi) pressure sensor to pressure tap (2) for delivery pressure of the idler pump.
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Pump compartment (6) Negative flow control line (drive pump) (7) Negative flow control line (idler pump) (15) Pressure tap (negative flow for drive pump) (16) Pressure tap (negative flow for idler pump)
Attach a 3447 kPa (500 psi) pressure sensor to pressure tap (15) for negative flow control pressure for the drive pump. Attach a 3447 kPa (500 psi) pressure sensor to pressure tap (16) for negative flow control pressure for the idler pump.
Install multitach group (C) on the engine. This will be used to monitor engine speed.Test Procedure
Note: Perform the test for the drive pump and the test for the idler pump one at a time.
To prevent personal injury or equipment damage from failure of the hydraulic test equipment or associated circuit components because of blocked pump flow, make sure that the test equipment valves are fully open before starting the engine.
To prevent personal injury and/or equipment damage from failed lines or components while the hydraulic test equipment is returned to the open flow position, slowly open the hydraulic test equipment valve while