TM 5-3810-305-23
0135
INSPECTION
1.
Inspect parts IAW General Maintenance Instructions (WP 0162).
2.
Inspect bore of case for scoring or deep scratches that would indicate a contaminated hydraulic system.
3.
Inspect spool for wear or damage.
4.
Inspect hydraulic hose ports for contamination and crossed or stripped threads.
END OF TASK
ASSEMBLY
CAUTION
When replacing seals, caution must be used to prevent stretching, cutting, or nicking seals.
Seals must be walked on one side at a time. Before starting assembly, coat entire spool and
bore of case with hydraulic oil.
1.
Install new thrust washer (Figure 6, Item 5) on spool (Figure 6, Item 12).
2.
Install back-up ring (Figure 6, Item 6) and new o-ring (Figure 6, Item 7) on spool (Figure 6, Item 12).
CAUTION
DO NOT allow rectangular rings to "twist" in seal groove. Seals can be made pliable to aid in
installation by soaking in 300F (149C) oil. Failure to follow this caution may result in damage
to equipment.
NOTE
Compress teflon seals while they cool so that seals return to their original shape.
3.
Install seven new gaskets (Figure 6, Item 9), new gaskets (Figure 6, Item 8), and two new retainer packings
(Figure 6, Item 11) on spool (Figure 6, Item 12).
4.
Install new o-ring (Figure 6, Item 10) and back-up ring (Figure 6, Item 6) on spool (Figure 6, Item 12).
5.
Carefully install spool (Figure 6, Item 12) by pushing spool into case (Figure 6, Item 13) from bottom.
Align match marks and seat spool firmly.
6.
Install new thrust washer (Figure 6, Item 4), new o-ring (Figure 6, Item 3), plate (Figure 6, Item 2), and four
capscrews (Figure 6, Item 1) in case (Figure 6, Item 13).
0135-8
03/15/2011Rel(1.8)root(maintwp)wpno(M00151)
