COIL GP-IGNITION 3433872 - Caterpillar

At operating temperature, the hydraulic oil tank is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the hydraulic system before any hydraulic lines or components are disconnected or removed.
Release the pressure in the hydraulic system as follows:a. Shut off the engine.b. Move the control levers through their full travel strokes. This will relieve any pressure that may be present in the pilot system.c. Slowly loosen the air breather cap on the hydraulic oil tank to release the pressure.d. Tighten the air breather cap on the hydraulic oil tank.e. The pressure in the hydraulic system has now been released. Lines and components can now be removed. 1. Disconnect hoses (1) from the steering cylinder. Put caps or plugs in the hoses and cylinder to keep out dirt and foreign material.2. Remove nuts (2) from each end of the cylinder.3. Remove steering cylinder (3). The following steps are for the installation of the steering cylinder (servo sender).4. Put steering cylinder (3) in position with nuts (2).5. Connect hoses (1) to the steering cylinder. Refer to the topic "Lubricant Viscosities and Refill Capacities" in the Operation and Maintenance Manual and fill the hydraulic system with hydraulic fluid.Disassemble Steering Cylinder (Servo Sender)
Start By:a. remove steering cylinder (servo sender) 1. Remove bolts (2) and heads (4) and (1) from tube (3). 2. Remove rod (7) and piston (6) from rod (5). 3. Remove seal assemblies (8) and ring (9) from piston (6). 4. Remove head (4) from rod (5).5. Remove O-ring seal (10) from head (4). 6. Use tool (A), and remove snap ring (14) from head (4).7. Remove retainer (12) and seal (11) from head (4).8. Remove wiper (13) from retainer (12). 9. Remove two rings (15) from rod (5). Use a press and a spacer with a length of 50.8 mm (2.00 in) and an outside diameter of not more than 31.75 mm (1.250 in) and an inside diameter of not less than 25.4 mm (1.00 in) to remove bearing (16) from rod (5).10. Head (1) (see illustration B68108P1) has the same parts as head (4). For disassembly of head (1), repeat Steps 5 through 9.Assemble Steering Cylinder (Servo Sender
1. Install ring (1) in the groove of rod (3).2. Use a press and a spacer with a length of 50.8 mm (2.00 in), and outside diameter of not more than 31.75 mm (1.250 in) and an inside diameter of not less than 25.4 mm (1.00 in) to install bearing (2) into rod (3).3. Install ring (4) in the groove of rod (3). 4. Use tool group (B) to install wiper (8) in retainer (7) with the lip of the wiper down. Put clean hydraulic oil on the lip of the seal.5. Install seal (5) in head (6) with the lip of the seal toward the inside. Put clean hydraulic oil on the lip of the seal.6. Use tool (A), and install snap ring (9) in the groove of head (6). 7.