CONNECTOR-PORT 0307937 - 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.
Before disconnecting any lines from the accumulator, slowly discharge all gas pressure by opening the gas valve located at one end of the accumulator. After all of the gas pressure has been released, release the hydraulic pressure from the other side of the accumulator. Failure to release the pressure slowly can cause rapidly discharging gas and/or hydraulic fluid. This can result in personal injury or death.
2. Release the nitrogen in the accumulator by opening the gas valve only one turn. Allow all of the nitrogen gas pressure to be released. 3. Disconnect electrical connection (1) and the pressure switch.4. Disconnect hose (4).5. Remove three bolts (6) and the washers. Remove one bolt (2) and the washer. Remove strap (3). Remove accumulator (5). The following steps are for the installation of the brake accumulator.6. Check the condition of all o-ring seals. If any of the seals are worn or damaged, use new parts for replacement.7. Install the brake accumulator in the reverse order of removal.
Charge the brake accumulator only with dry nitrogen gas.
8. Charge the accumulator with dry nitrogen gas. See "Testing And Charging The Accumulator" in the Challenger 65B And 75 Agricultural Tractors Undercarriage, Steering And Brakes in the Systems Operation Testing & Adjusting Manual, Form No. SENR4967.