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D. Hydraulic System
Inspection and Maintenance of Hydraulic Equipment
d
CAUTION: During operation, the parts of the
hydraulic system become very hot.
Allow the machine to cool down before beginning
inspection or maintenance.
1. Park the machine following the same procedures as
described on page 7-7 for preparation of inspection/
maintenance work.
2. Begin servicing hydraulic components only after
components, hydraulic oil and lubricants are
completely cooled, and after releasing residual circuit
pressures.
2.1 Release internal pressure.
2.2 Be sure to relieve the air pressure from the hydraulic
oil tank by pressing air bleed valve (1).
2.3 Allow the machine to cool down.
Note that servicing heated and pressurized hydraulic
components may cause hot parts and/or oil to
fly off or escape suddenly, possibly resulting in
personal injury.
Keep body parts and face away from plugs or screws
when removing them.
Hydraulic components may be pressurized even
when cooled.
Service only on a flat, solid and level surface.
MAINTENANCE
7-42
90Z7-7-37
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