PUMP-VANE 5066310 - Caterpillar

Charge Pump
Before any tests are performed, prepare the machine. Refer to Testing and Adjusting, "Machine Preparation". Before any tests are performed, visually inspect the complete hydraulic system for oil leaks and damaged parts. Refer to Testing and Adjusting, "Visual Inspection".
Illustration 1 g00592868
Open the engine access door. Install tooling (A) in order to measure engine speed. Use the reflective tape that is on the pulley for the engine crankcase. Ensure proper engine operation.
Stop the engine. Release the system pressure before attempting any adjustment. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release" for the proper procedure.
Illustration 2 g01356939
Disconnect the hose assembly (1) from the fan motor inlet. Install tooling (B). Connect the flow meter inlet to the hose assembly (1). Connect the outlet of the flow meter to the fan motor inlet. The flow meter is installed in-line to the outlet of the charge pump.Note: Damage to the pump and damage to the hoses may result from the high pressure that is created by the flow meter valve.Note: The flow meter valve must be fully open before installing the flow meter in-line.Note: Ensure that the outlet flow from the flow meter is returned to the fan motor inlet in order to maintain charge flow to the hystat pump.
Route the test lines and cables in order to avoid contact with the muffler. Secure the test instruments so that the test instruments are visible during the test.
Fasten the seat belt. Lower the armrest.
Start the engine. Run the engine at high idle.
The oil in the hydraulic system must be at an operating temperature of 45° 5°C (113° 9° F) throughout the test.
Set the pump outlet pressure to 18000 1000 kPa (2611 145 psi) by slowly adjusting the load valve on the flow meter.Note: Maintain the pump outlet pressure to 18000 1000 kPa (2611 145 psi) throughout the test.
Set the engine speed to 2000 10 RPM. Ensure that engine speed is maintained throughout the test.Note: If necessary, readjust the pressure to 18000 1000 kPa (2611 145 psi).
Refer to 3 for the flow specification. Replace the pump if the specification is not met.
Unload the pump by adjusting the flow meter valve to the fully open position.
Stop the machine. Remove the Multitach Tool Gp (A) and the Portable Hydraulic Tester (B). Reconnect hydraulic lines.
Table 2
System Requirements    
Test     Specification    
Pump Outlet Pressure    
18000 1000 kPa (2611 145 psi)    
Engine Speed     2000 10 RPM    
Oil Temperature    
45° 5°C (113° 9° F)    
Table 3
Charge Pump    
Machine Model     Minimum Flow    
248B/ 268B    
32 L/min (8.45 US gpm)    Pump Flow Test for the High Flow Auxiliary Circuit
In order to test the flow in the high flow auxiliary circuit, install one 6V-9746 O-Ring Seal into each 6V-9969 Coupling As. Install one 107-1341 Adapter into each 6V-9969 Coupling As. Install one 3D-2824 O-Ring Seal onto the 6V-5258 Adapters. Install the 6V-5258 Adapters onto