CONTROL AS-RATIO 7W5318 - Caterpillar

Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
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, perform the procedure that follows before testing and adjusting the hydraulic system.
Note: Permit only one operator on the machine. All other personnel should be kept away from the machine.
Move the machine to a location that is smooth and horizontal. Move the machine away from other operating machines and away from personnel.
Lower the work tool to the ground.
Stop the engine.
Engage the parking brake.
Put blocks in front of the wheels, and put blocks behind the wheels.
Turn the engine start switch key to the ON position.
Step on the brake pedal until there is no brake pressure.
To relieve the hydraulic pressure in the hydraulic system, move the pilot valve to all positions .
Move the steering wheel in both directions. This will relieve system pressure.
Turn the engine start switch key to the OFF position.