LINER 1939387 - Caterpillar

At operating temperature, the hydraulic oil is hot and under pressure. Hot oil can cause burns. Sudden movement of the machine or release of oil pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the following procedure before working on the hydraulic and steering systems.
a. Move the machine to a smooth horizontal location. Move away from working machines and personnel. Lower all implements to the ground. Install the wheel lean pin in front axle.b. Permit only one operator on the machine. Keep all other personnel either away from the machine or in view of the operator.c. Activate the parking brake. Place all implements on the ground and put the blade in the "FLOAT" position.d. Stop the engine.e. Turn the steering wheel back and forth several times to relieve pressure in the steering accumulator.f. Carefully loosen the filler cap on the hydraulic tank to release pressure in the tank.g. Be sure all hydraulic pressure is released before any fitting, hose, or component is loosened, tightened, removed or adjusted.h. Tighten the cap on the hydraulic tank.i. The pressure in the hydraulic system must be released before lines or components can be removed.
Hydraulic pressure can exist in the hydraulic lines between the control valves and the cylinders with the engine stopped. Manually relieve pressure before working on any hydraulic circuit.
1. Remove plug (7) from the ecology drain at the bottom of hydraulic oil tank (1). Drain the hydraulic oil in a suitable container for storage or disposal. The capacity of the hydraulic oil system is 63 liters (16.8 U.S. gal).2. Remove window washer hose (5) from the pump, located underneath the left rear of the cab.3. Disconnect three hydraulic hoses (6) from the bottom of hydraulic oil tank (1).4. Loosen two hose clamps (10) that secure hose (11). Slide hose (11) down the pipe and out of the way.5. Disconnect wiring harness (8) from hydraulic oil tank (1).6. Remove nut (9) and the washer that hold wiring harness (8) to hydraulic oil tank (1). 7. Attach Tooling (A) and a hoist to hydraulic oil tank (1).8. Remove bolts (2) and the washers that hold support (3) to the top of hydraulic oil tank (1).9. Remove the bolts and washers, the nuts and washers and spacer (4) that hold support (3) to the bottom of hydraulic oil tank (1).10. Remove hydraulic oil tank (1) from the back side of the cab. The weight of hydraulic oil tank (1) is 90 Kg (200 lb).Install Hydraulic Oil Tank
1. Use Tooling (A) and a hoist in order to position hydraulic oil tank (1) to the proper location on the back side of the cab. 2. Install bolts (2) and the washers that hold support (3) to the top of hydraulic oil tank (1).3. Install bolts and washers, nuts and washers, and spacer (4) that hold support (3) to the bottom of hydraulic oil tank (1).4. Install nut (9) and the washer that hold wiring harness (8) to hydraulic