HOSE AS 4809505 - Caterpillar

Disconnect batteries before performance of any service work.
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.
2. Drain the oil from the hydraulic tank in a suitable container for storage or disposal. The capacity of the hydraulic system is 38 L (10 gal U.S.). 3. Remove oil supply hose (2) from electric drive pump group (3). Removehose assembly (1) from electric drive pump group (3).4. Remove nut (6), the washer and ground cable (5) from electric drive pump group (3).5. Remove boot (7), the nut, the washer and power cable (8) from electric drive pump group (3).6. Remove bolts (4), the washers and electric drive pump group (3) from the side of the frame.Install Supplemental Steering
1. Position electric drive pump group (3) and install bolts (4) and the washers that secure it to the side of the frame.2. Install power cable (8), the washer, the nut and boot (7) to electric drive pump group (3).3. Install ground cable (5), the washer and nut (6) to the side of the frame.4. Install hose assembly (1) and oil supply hose (2) to electric drive pump group (3).5. Fill the hydraulic tank with oil to its correct level. Refer to the "Operation & Maintenance Manual" for the proper procedure.