Inspection And Maintenance Of Hydraulic Equipment - Hitachi EX 3600-6 Operator's Manual

INSPECTION AND MAINTENANCE OF
HYDRAULIC EQUIPMENT
CAUTION: During operation the parts of the
hydraulic system become very hot.
Allow the machine to cool down before begining
inspection or maintenance.
1. Be sure that the machine is parked on a level, firm
surface before servicing hydraulic equipment.
2. Lower the bucket to the ground and stop the engine.
3. Begin servicing hydraulic components only after
components, hydraulic oil and lubricants are com-
pletely cooled, and after releasing residual pressure.
3.1 Bleed air from the hydraulic oil tank to release in-
ternal pressure.
3.2 Allow the machine to cool down.
Note that servicing heated and pressurized hydrau-
lic components may cause hot parts and/or oil to fly
off or escape suddenly, possibly resulting in per-
sonal injury.
3.3 Keep body parts and face away from plugs or
screws when removing them.
Hydraulic components may be pressurized even
when cooled.
3.4 Never attempt to service or inspect the travel and
swing motor circuits on slopes. They are highly
pressurized due to self-weight.
MAINTENANCE
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