CIRCUIT BREAKER AS 1712209 - Caterpillar

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To prevent possible injury, do the following procedure prior to servicing the machine.
1. Release the pressure in the brake system and steering system as follows:a. Move the machine to a smooth horizontal location. Move away from working machines and personnel, and lower the implements to the ground.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. The parking brake will prevent forward and backward tractor movement with the engine running. It will not prevent tractor movement right or left if the steering wheel is turned with the engine running. Activate the service brakes to prevent all tractor movement with the engine running.d. Stop the engine.e. Move the steering wheel right and left to release the pressure in the steering hydraulic system.f. Depress and release the brake pedal a minimum of 10 times to discharge the brake accumulator.g. Carefully loosen the filler cap on the hydraulic oil tank to release the pressure in the tank.h. Be sure all hydraulic pressure is released before any fitting, hose or component is loosened, tightened, or removed or adjusted. 2. Disconnect tube assemblies (1) and hoses (5) from steering pilot diverter valve (4).3. Remove the two bolts and bracket (2) from the transmission.4. Remove four bolts (3), and remove steering pilot diverter valve (4) from bracket (2). The following steps are for installation of the steering pilot diverter valve.5. Position steering pilot diverter valve (4) on bracket (2), and install four bolts (3).6. Position bracket (2) on the transmission, and install the two bolts that hold it in place.7. Connect tube assemblies (1) and hoses (5) on the steering pilot diverter valve.End By:a. install seat assembly and seat support