PUMP GP 9T6766 - Caterpillar

VIEW FROM UNDER MACHINEstart by:a) remove crankcase guard (tractor engine) **This operation is in the Engine Disassembly and Assembly Section.
Before any hydraulic lines are disconnected from the cylinder, release the pressure from the hydraulic system. Start the engine and move the ejector forward all the way. Stop the engine and loosen the cap on the hydraulic tank slowly.
1. Drain the oil in the hydraulic tank until the level is at the "ADD" mark. Connect tooling (A) to the hydraulic tank. Connect shop air to tooling (A). Tooling (A) will hold the oil in the hydraulic lines.2. Put identification on the three hydraulic hoses that are connected to the cylinder for correct installation.3. Disconnect three hoses (2) from the cylinder.4. Remove the cotter pin, washer and pin (1) that hold the rod end of the cylinder.5. Remove the four bolts from bracket (4) on the head end of the cylinder. Remove cylinder (3).Install Steering Cylinder (Servo-Receiver)
VIEW FROM UNDER MACHINE1. Put cylinder (1) in position in the machine.2. Install the four bolts in the bracket at the head end of the cylinder.3. Install the pin, washer and cotter pin that hold the rod end of the cylinder to the lever.4. Connect the three hoses to the cylinder. Make sure the hoses are in the correct positions.5. Remove tooling (A) from the hydraulic tank and fill it with hydraulic oil to the correct level. See Lubrication and Maintenance Guide.end by:a) install crankcase guard (tractor engine) **This operation is in the Engine Disassembly and Assembly Section.Disassemble Steering Cylinder (Servo-Receiver)
start by:a) remove steering cylinder (servo-receiver) 1. Remove cotter pin, pin (1), support (3) and the spacers from the head end of the cylinder.2. Remove oil line (4) and bolts (2) that hold the retainer and head on the cylinder. 3. Put the cylinder in a vise and pull rod (5) with retainer head and piston out of the cylinder. 4. Put the rod in a vise. Remove nut (7), piston (6), head (9) and retainer (8) from the rod.5. Remove the rings and seal assemblies from the piston. Remove the O-ring seal, back-up ring and seal from the head. Remove the wiper from the retainer. 6. Remove snap ring (10) and bearing (11) from the rod. 7. Remove head (12) from the tube of the cylinder. 8. Remove O-ring seal (13) and the back-up ring from the head. Remove snap ring (14) and the bearing from the head.Assemble Steering Cylinder (Servo-Receiver)
1. Use a piece of pipe (2) that is 4 in. (10.2 cm) long with a 1 1/4 in. (31.8 mm) outside diameter and 15/16 in. (23.8 mm) inside diameter to install the bearing in the head until it is against the bottom snap ring. Install the top snap ring that holds the bearing in place.2. Install back-up ring (1) on the head next to the flange and O-ring seal (3) as shown. Put clean oil on the O-ring seal and back-up ring. 3. Install head (4) in the tube of the cylinder.