CYLINDER GP-HOIST 2898616 - Caterpillar

Table 1
Tools Needed     Qty    
6V-7830 Tetragauge     1    
Hydraulic oil pressure can remain in the hydraulic oil system on this machine after the engine and pump have been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic systems. To prevent possible injury, refer to the procedure in Testing and Adjusting Manual, "Release of Pressure in the Hydraulic System".When possible, the bucket must always be lowered to the ground before service is started. When it is necessary for the boom to be in the raised position while tests or adjustments are done, be sure that the boom, stick and bucket have correct support.Be sure the swing parking brakes and the travel parking brakes are on and the brake release lines are disconnected and plugged.Always move the machine to a location away from the travel of other machines. Be sure that other personnel are not near the machine when the engine is running and tests or adjustments are being made.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00685810
Single implement piston pump (1) "M1" port
Illustration 2 g00645297
Tandem implement piston pump (1) "M1" port
Remove the plug and install a 6V-3965 Nipple Assembly and 3J-1907 O-Ring Seal into the "M1" port (1) of the pump that is being tested. Install a 6V-7830 Tetragauge and test hose onto the pressure tap.
Start the engine.
Warm the oil. Refer to the Testing and Adjusting, "General Information" for the proper procedure for warming the hydraulic oil.
Set the throttle switch in position 10.
Slowly actuate the curl function for the bucket. Hold the curl function in a stalled condition. Read the pressure readings on the tetragauge.
Stop the engine. Disconnect the tetragauge.
Repeat Step 1 through Step 6 for the remaining pumps that are being tested.