AIR COMPRESSOR GP 3747094 - 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. Remove four bolts and washers (1) and cover (2). The weight of cover (2) is 32 kg (70 lb). 2. Attach lifting straps to bail cylinder.3. Disconnect line (6).4. Remove nut, washer, bolt and clip (7) holding line (6) to the cylinder.5. Remove bolt and washer (3) and pin assembly (4) from both ends of the cylinder.6. Remove bail cylinder (5). Install in reverse order. Refer to the topic "Lubricant Viscosities and Refill Capacities" in the Operation and Maintenance Manual and fill the hydraulic system with hydraulic fluid.