HARNESS AS-ENGINE 1635450 - Caterpillar

Illustration 8 g06127948
Hydraulic Schematic
(49) Case drain port
(50) Electrical connector for stroke limiter
(51) Adjustment screw for stroke limiter
(52) Pilot pressure port
(53) Adjustment screw for pilot pressure
(54) Gauge port for control pressure
(55) Gauge port for discharge pressure
(56) Adjustment screw for minimum displacement
(57) Discharge port
(58) Case drain port
(59) Suction port
(60) Cased drain port
(61) Gauge port for stroking pressure
(62) Adjustment screw for maximum displacementPump Setup
Mount the pump with case drain port (49) upward.
Connect the suction port (59) to the test bench oil supply.
Connect a 1 inch high pressure "XT6" hose from the pump discharge port (57) to a flow meter inlet on the test bench. Connect a 1 inch high pressure "XT6" hose from the flow meter outlet to the test bench reservoir.
Connect a pilot oil supply line from the pilot pressure port (52) to a signal pressure supply on the test bench.
Fill the pump case with oil. Pour oil directly into case drain port (49) until the case is full.
Purge all air from the suction line. Carefully loosen the suction hose at the pump until oil leaks from the connection. Tighten the suction hose.
Install flow meter to case drain port (49). Route the flow meter discharge back to tank.
Connect an electrical power supply to the electrical connector for stroke limiter (50)Test Procedure
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)
This step will verify proper pump assembly.Increase solenoid current to the electrical connector for stroke limiter (50) according to Step 1 of the "Test Specifications". Start rotating the pump according to Step 1 of the "Test Specifications". Listen for abnormal noise. Verify that all the connections are not leaking. Check for leaks around the shaft seals and control valve.
This step will verify the minimum displacement setting of the pump and the start of the electrical stroke limiter function of the pump control.Slowly increase the input speed according to Step 2 of the "Test Specifications". Increase pump discharge pressure to the value in Step 2. Decrease solenoid current to the electrical connector for stroke limiter (50) according to Step 2 of the "Test Specifications". At this step, the pump should produce only a small amount of discharge flow. Verify that the discharge flow has decreased. If the pump discharge flow is not equal to the value given in the "Test Specifications", adjust the screw for minimum displacement (56) until the flow is within specification.
This step will verify the maximum displacement setting of the pump and the end of the electrical stroke limiter function of the pump control.Slowly increase solenoid current to the electrical connector for stroke limiter (50). Verify that pump discharge flow has increased to the value in Step 3 of the "Test Specifications". If the pump discharge flow is not equal to the value given in the "Test Specifications", adjust the screw for maximum displacement (62) until the flow is within specification.If