AXLE GP-FRONT 2563895 - Caterpillar

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     Test Gauge Hose    
6V-4143 Coupler (1)     1    
177-7860 Hose Assembly (1)     1    
8T-4188 Union Adapter (1)     1    
6V-3966 Fitting (1)     1    
B     Test Gauge    
8T-0861 Pressure Gauge (1)     1    
6V-4144 Coupler (1)     1    
( 1 ) Part of 4C-4892 ORFS Fittings Group
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Prepare the machine for testing by completing the procedure that is specified in the Service Manual module Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.
Illustration 1 g00713597
View of the pressure tap for the implement pumpThe cab and the access door have been removed for photographic clarity. (1) Pressure Tap
Illustration 2 g00713677
View of Tool (A) on pressure tap (1)
Install test gauge hose (A) on pressure tap (1) and connect test gauge (B) to test gauge hose (A) .
Start the machine.
Warm the hydraulic oil to normal operating temperature.
Tilt the bucket to the full tilt back position.
Lower the boom fully.
Return the lift control lever to the HOLD position.
Increase engine speed to high idle.
Move the lift control lever to the full LOWER position. Do not enter the FLOAT. Hold the control lever in this position.Note: Do not hold relief pressure for more than 30 seconds at a time.
Record the pressure reading from test gauge (B) .
The main relief pressure should be 31000 450 kPa (4500 65 psi). If the pressure is correct proceed to step 16. If the pressure reading is not correct, perform the following procedure in order to adjust the main relief valve.
Illustration 3 g00713684
Location of the Main Relief ValveThe view is from the right side of the machine.
Illustration 4 g00713686
(2) Locknut. (3) Adjuster screw. The view is from the hitch area on the right side of the machine.
Loosen locknut (2) .
Turn adjuster screw (3) in order to adjust the pressure setting. Turn adjuster screw clockwise in order to increase the pressure setting. Turn the adjuster screw counterclockwise in order to decrease the pressure setting.
Tighten locknut (2) .
Repeat steps 2 through 14, as needed.
Lower the work tool to the ground.
Stop the engine.
Remove test gauge hose (A) and test gauge (B) from the machine.