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[8] HYDRAULIC EQUIPMENT HANDLING
• Hydraulic equipment will be at elevated temperatures during and immediately after operation. Hydraulic
equipment operates under high pressure. The following precautions should be observed when
performing inspection and maintenance of hydraulic equipment.
• Place the machine in travel position on a level surface to reduce the application of pressure to the
cylinder circuit.
• Be sure to stop the engine.
• Hydraulic oil and lubricating oil will be at elevated temperatures and high pressure immediately after
equipment comes to a stop. Perform inspection and maintenance only after the oil temperature drops to
a safe level. An internal pressure may be exerted despite temperature drop. When removing the plugs,
screws and hose joints, stand aside and provide gradual loosening to decompress.
• Be sure to remove the pressure by releasing air from the hydraulic tank before performing inspection and
maintenance of the hydraulic circuit.
• Inspection and maintenance include hydraulic oil level check and replacement of the filters and hydraulic
oil.
• Check the O-ring for scratches when removing the high-pressure hose. If check finds scratches, replace
the O-ring.
• Air bleed of the hydraulic circuit is required after the following tasks are performed: replacement and
cleaning of the hydraulic oil filter element and strainer, repair and replacement of hydraulic equipment,
and hydraulic piping replacement.
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