BELT-SERPENTINE 2892358 - Caterpillar

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. In order to prevent possible injury, perform the procedure that follows before testing, adjusting or working on any hydraulic components.
a. Move the machine to a smooth, hard and dry horizontal surface. Move away from working machines and personnel. Lower the blade or attachment to the ground. Stop the machine.b. Permit only one operator on the machine. Keep all other personnel either away from the machine or in view of the operator.c. Engage the parking brake. Put blocks in front of and behind the wheels.d. Push the brake pedal many times until there is no more brake oil pressure.e. When the blade or attachment is raised for test, adjustments or maintenance, make sure that the blade or attachment has proper support. The lift circuit has high oil pressure when the lift arms raise the front of the machine. Do not stop the engine with the front of the machine off of the ground, unless a system test requires it. Lower the front of the machine to the ground and stop the engine.f. Install the steering frame lock link so the machine can not turn.g. Move the hydraulic control levers to all positions in order to release the pressure in the hydraulic system. Place the tilt control in the FLOAT position. Place the lift control in the HOLD position.h. Carefully loosen the fill cap on the hydraulic tank in order to release the pressure in the tank.j. Make sure that all hydraulic pressure is released before any fitting, hose or component is loosened, tightened, removed or adjusted.k. Tighten the fill cap on the hydraulic tank.2. Drain oil from the hydraulic system. 3. Disconnect hydraulic lines (2), (3) and (4) from supplemental steering diverter valve (1). There are four bolts and washers each. Disconnect electrical connector (5). Line (2) is pressure to steering valve. Line (3) is pressure from main steering pump. Line (4) is to the tank. 4. Disconnect pilot line (6) from diverter valve (1). 5. Remove four bolts and washers (7) securing diverter valve to side of supplemental steering pump. Remove two bolts and side of supplemental steering pump. Remove two bolts and washers (8). Remove diverter valve from pump. Weight of the supplemental steering valve is. 20 kg (44 lb). Install supplemental steering valve in reverse order.6. Check the condition of all O-rings and seals. Replace if necessary. Refer to the Operation & Maintenance Manual for all fluid capacities and the proper filling procedures.7. Fill hydraulic tankEnd By:a. remove steering link lockDisassemble & Assemble Supplemental Steering Valve
Start By:a. remove supplemental steering valve 1. Remove relief valve (2) from supplemental steering valve assembly (1). 2. Carefully remove two remaining bolts securing load sensing port housing (3) to valve assembly (1). Spring tension will be forcing load sensing port housing (3) off. Remove load sensing port housing (3) and O-ring (4). 3. Remove spool (5), shims (6) and