7-53
MAINTENANCE
Replace Pilot Oil Filter
--- every 2000 hours
Replace
d
WARNING: Hydraulic oil becomes hot and pressurized
during operation. Severe burns may result if
skin comes in contact with escaping hydraulic oil
immediately after operation. Wait for the oil to cool
before starting any maintenance work.
1. Park the machine following the same procedures as
described on page 7-8 for preparation of inspection/
maintenance work.
2. Install articulation lock bar to the front and rear of the
frame by following the procedures described on page
7-10.
3. Before replacing the filter element, be sure to relieve the
air pressure from the hydraulic oil tank by pressing air
bleed valve (1).
4. Remove the inspection cover for left side rear frame.
5. Rotate the hexagonal section on the bottom of case (2)
counterclockwise using a spanner to remove case (2)
from head (3).
6. While turning element (5), remove the element
downward.
7. Replace O-ring (4) with a new one.
8. Sufficiently seat O-ring (4) and backup ring (6) in the
O-ring groove on case (2).
9. Coat the seal surface of new element (5) with hydraulic
oil. While turning element (5), completely install element
(5) into head (3) using care not to damage the element.
MNEC-07-019
2
M4GB-07-044
1
70MPD8-07-01
3
6
5
2
4
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