COUPLER AS 1797015 - 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 attachments have been lowered, 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.
Note: Permit only one operator on the machine. Keep other personnel away from the machine or in the operator's sight.
Move the machine to a smooth, horizontal location. 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.
Place chocks in front of the wheels and behind the wheels.
Turn the engine start switch key to the ON position.
Move the pilot valves to all positions in order to release the pressure in the hydraulic system. Move the steering wheel in both directions in order to release the pressure in the steering system.
Turn the engine start switch key to the OFF position.
If the machine is equipped with load control valves, release the pressure in the lift cylinders and in the tilt cylinder. To release the pressure in the lift cylinders and in the tilt cylinder, perform the Operation and Maintenance Manual, SEBU8355, "Equipment Lowering with Engine Stopped". To remove the load control valves, refer to Disassembly and Assembly, KENR7640.