CONTROL GP-FOOT BRAKE 1064842 - Caterpillar

Before any hydraulic hoses are disconnected from the steering cylinder, release the pressure in the hydraulic system. Start the engine and move the ejector forward all the way. Stop the engine and loosen the cap slowly on the hydraulic tank. Move all the hydraulic controls backward and forward.
1. Disconnect hose assemblies (1) and (2) from the steering cylinder.2. Fasten a hoist to the steering cylinder. Remove bolt (3) and pin assembly (4) from the head end of the cylinder. 3. Remove four bolts (5) and two yokes (7). Remove pin (6) from the rod end of the cylinder. 4. Remove steering cylinder (8). The weight of the cylinder is 90 kg (200 lb.). 5. Remove the bearing from the draft frame with tooling (A). The following steps are for installation of the steering cylinders.6. Install the bearing in the draft frame with tooling (A). Install the bearing until it is even with the outside surface of the bracket on the draft frame.7. Fasten a hoist to steering cylinder (8) and put it in position on the draft frame and between the link assemblies.8. Install pin (6) in the rod end of the cylinder. Install two yokes (7) and four bolts (5) that hold the two yokes.4. Install pin assembly (4) and bolt (3) in the head end of the cylinder.5. Connect hose assemblies (1) and (2) to the steering cylinder.6. Start the machine. Turn the machine from stop to stop to release the air in the steering cylinders.7. Fill the hydraulic tank with oil to the correct level. See the Maintenance Manual.Disassemble And Assemble Steering Cylinders
Start By:a. remove steering cylinders 1. Remove the bearing from the rod end of the steering cylinder with tooling (C). 2. Fasten a hoist to steering cylinder (1) and put it in position on tool (A) as shown with the openings for the hydraulic lines down. 3. Pull the rod out of the cylinder all the way and install support (2) under the rod. Fasten a strap around the rod to hold it in position.4. Remove four bolts (3). Pull the cylinder off of the rod and piston. 5. Remove nut (6) from the rod with tooling (B).6. Remove piston assembly (5) and head (4) from the rod. 7. Remove wear ring (7) and seal assembly (8) from the piston. 8. Remove O-ring seal (9) and back-up ring (10) from the head. Check the condition of the O-ring seal. If the seal has damage, use a new part for replacement. 9. Remove seals (11), (12) and (13) from the head. The following steps are for assembly of the steering cylinders.10. Install the three seals in the head. Install the inside seal and the center seal with the lip toward the inside of the cylinder. Install the outside seal with tool (B). Install the seal with the lip toward the outside of the cylinder and until the seal makes contact with the counterbore in the head.11. Install back-up ring (10) and O-ring seal (9)