M
AINTENANCE
& I
NSPECTION
C
HAPTER
9
9-20
THP 94/42 R 4 XXT
THP 125/42 R 4 XXT
THP 140 H/42 R 4 XXT
GB-07.2005
9.6.2
High-pressure filters for the boom
and hydraulic pumps
If the red ring in the clogging indicator (Item 1, Fig. 9.7) is
visible, the filter element must be changed:
1.
Unscrew the filter casing (
2
) anti-clockwise.
2.
Pull the filter element (
3
) downwards from the casing
(
4
).
3.
Clean the filter casing, replace the O-ring, and grease
the thread and O-ring.
4.
Fill the filter casing with clean oil.
5.
Plug in the filter element.
6.
Fit the filter casing and tighten it to approx. 150 Nm.
9.6.3
Return flow filter
If the clogging indicator (Item 1, Fig. 9.8) is in the red zone
when the oil is at operating temperature, the filter element
must be changed:
1.
Have a suitable container ready for the oil filter element,
and clean the outside of the filter casing.
2.
Undo the 4 screws (
3
) and place the cover (
2
) on a clean
surface.
3.
Take out the filter element (
4
) with spring and dirt sleeve
(
5
).
4.
Twist the dirt sleeve anti-clockwise and pull it off, then
thoroughly clean it and fit it to the new filter element.
5.
Fit the new filter element into the return flow filter.
6.
Fit the spring and cover, secure with 4 screws.
7.
Check filter for leak-tightness.
NOTE:
When changing the return-flow filter, always
change the air filter (6) also!
1
4
2
3
Fig. 9.7 Changing the high pressure filter
1
4, 5
3
2
6
Fig. 9.8 Changing the return flow filter
