CYLINDER & MTG GP-HOIST 3000687 - Caterpillar

Introduction
The following procedure will explain the steps for purging the steering system.Required Tools
Table 1
Tool Part Number Description Qty
D 8T-2362 Adapter
Change 02(1) 4
F 7J-0204 O-Ring Seal 4
G 6V-8628 Elbow 4
H 3J-7354 O-Ring Seal 4
J 4J-5477 O-Ring Seal 4
K 9C-2394 Hose As 2
(1) The adapter must be change 02, which has 3/8-24 SAE thread.Machine Preparation
Move the machine to a smooth horizontal location.
Chock the wheels.
Lower all of the implements.
Illustration 1 g01727254
Typical top view of the front axle
(1) Cylinders for the steering
(2) Location of the plugs
Perform this Step with the engine in the OFF position. Remove the plugs (2) from each steering cylinder (1).
Use the parts that are listed in Table 1 in order to connect the port of the rod end to the port of the head end. Perform this procedure for both of the cylinders. Purge Procedure
Start the engine and operate the engine at low idle.
Steer the wheels against the left stop. Turn the steering wheel to the left 50 complete revolutions.
Steer the wheels against the right stop. Turn the steering wheel to the right 50 complete revolutions.
Shut off the engine.
Remove the parts that are listed in Table 1 from each cylinder and install the plugs (2).
Check the oil level in the hydraulic tank. Purge Procedure (Signal Network)
Note: Before you perform this procedure, refer to Testing and Adjusting, "Machine Preparation for Troubleshooting".Note: Perform the Steering System−Purge procedures before you perform the Purge Procedure (Signal Network).
Illustration 2 g01727274
Pressure and flow compensator valve
(3) Purge valve for the flow compensator
(4) Resolved signal from the combination valve
(5) Adjustment screw for the flow compensator (margin pressure)
(6) Locknuts
(7) Adjustment for the pressure compensator (pressure cutoff)
Illustration 3 g01727275
Section A-A of pressure and flow compensator valve
(3) Purge valve for the flow compensator
(4) Resolved signal from the combination valve
Use a hex wrench. Open the purge valve for the flow compensator (3) counterclockwise by one turn. The purge valve for the flow compensator (3) is located on the pressure and flow compensator valve.
Start the engine and operate the engine at low idle. During this procedure, a small amount of oil may leak by the purge valve.
Move each implement control lever forward and hold the lever for 5 seconds. Then, move the levers backward and hold the lever for 5 seconds. Note: When you are moving each implement control lever, start sequentially from right to left.
After all implement control valves have been operated, turn the steering wheel to the left and to the right ten times.
Close the purge valve for the flow compensator (3) by turning the purge valve for the flow compensator clockwise.
Stop the engine.