BOLT 0870357 - Caterpillar

Table 1
Tools Needed     Qty    
6V-9508 Face Seal Plug     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.
Note: Always warm the hydraulic oil to a minimum temperature of 50°C (122°F) before starting the testing and adjusting procedure.
Illustration 1 g00635935
Travel motors (1) Lines to the travel motors
Disconnect lines (1) and cap the hoses.
Install a hose in the open ports and run to a suitable container.
Illustration 2 g00635936
Swivel (2) Port to travel parking brakes (F) Front of the machine
Disconnect the brake release line (2) for the travel parking brakes at the swivel. Install a 6V-9508 Face Seal Plug in the brake release line. Cover the port with a cloth in order to prevent contamination from entering the hydraulic system. This will ensure that the travel brakes will not release when the travel function is actuated.
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 to position 10.
Actuate and hold the travel function in one direction. Calculate the flow rate or measure the flow rate. A flow rate of 57 L/min (15 US gpm) or more indicates that there is a leak across the ports of the motor.
Actuate and hold the travel function in the opposite direction. Calculate the flow rate or measure the flow rate. A flow rate of 57 L/min (15 US gpm) or more indicates that there is a leak across the ports of the motor.
Stop the engine.
Repeat Step 1 through Step 9 for the travel motors on the opposite side of the machine.
Reconnect the line to the parking brakes.
Reconnect the lines to the travel motors.