DIODE AS 4483061 - Caterpillar

Hot oil and components can cause personal injury.Do not allow hot oil or components to contact skin.
Hydraulic oil pressure can remain in the hydraulic system on this machine after the engine and pump have been stopped. Serious injury can result if this pressure is not released before any service is done on the hydraulic system. In order to prevent possible injury, release the hydraulic system pressure before working on any fitting, hose, or hydraulic component.Lower all work tools to the ground before service is started. If the hydraulic system must be serviced, tested, or adjusted with the work tool in the raised position, the work tool and lift cylinders must be supported properly.Always move the machine to a location away from the travel of other machines. Be sure that other personnel are not near the machine when the engine is running and tests or adjustments are being made.
Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on products. Dispose of all fluids according to local regulations and mandates.
ReferenceRefer to Testing and Adjusting, "Machine Preparation for Troubleshooting" for the machine that is being serviced before performing the following procedure.Perform the following steps in order to release the hydraulic system pressure.
Park the machine on a smooth, level surface. The location should also be dry and free of debris. Stop the engine.
Lower the work tool to the ground.
Engage the parking brake.
Stop the engine.
Turn the engine start switch to the ON position without starting the engine.
Make sure that the door is shut.
Enable the hydraulics by pressing the "Arming" button on the keypad.
Move the joysticks and the pedals through the full range of travel to relieve any pressure that may be present in the hydraulic system.Note: If the hydraulic circuit requires the activation of a switch for operation, activate the necessary switches for the operation of the hydraulic circuit.
Illustration 1 g03630318
The manual vent on the Hydraulic Tank.
Push in the manual vent until all pressure is released.