TM 5-3805-280-24-2
Hydraulic System
10. Install the parts into housing.
IMPORTANT: The housing (17) and spools (19) are
replaced as an assembly because
Temporarily install M8-1.25 cap screws to hold the
the spools are select fitted to bores
plate (4) on housing.
in housing.
11. Install the pistons (18), small end first, into the
Some of the parts from ports 1 and 3
spools
are different than parts from ports 2
and 4. Parts for each port must be
12. Install plate (14). Tighten cap screw (13).
kept together and installed into the
same port from which it was
Bottom Plate-to-Housing Cap Screw--Specification
removed. The port numbers are
stamped on the housing.
Torque...................................................................... 49 Nm (36 lb-ft)
2. Temporarily install M8-1.25 cap screws to hold the
13. Apply thread lock and sealer (medium strength) to
plate (4) on housing.
threads on one end of U-joint (3).
Remove the U-joint (3).
Tighten U-joint into housing.
3. Remove cap screw (13).
U-Joint-to-Housing--Specification
Pull plate (14) from housing using an M16-2.0 cap
Torque.................................................................... 24 Nm (216 lb-in.)
screw.
Remove the temporarily installed cap screws.
4. Remove pistons (18). These pistons must be
removed FIRST and installed LAST.
14. Apply grease to the end of each pusher (8 and 11)
and to the joint of U-joint.
5. Slowly loosen the cap screws to release the spring
force of return springs on plate.
15. Install cam on U-joint. Adjust clearance between
pushers and cam.
6. Remove parts from housing. Remember to keep the
Cam-to-Pushers--Specification
parts removed from each port together. Identify
each group of parts by the port numbers stamped
Clearance.................................................. 0--0.20 mm (0--0.008 in.)
on the housing.
While holding cam (2), tighten coupling (1).
7. Repair or replace parts as necessary.
Coupling-to-Cam and U-Joint--Specification
8. Install the same number of shims (21) on each
spool (19) as were removed.
Torque....................................................................... 78 Nm (58 lb-ft)
Push the balance spring (23 and 25) down and
then install the spacer (retainer) (20) so the recess
side is against the spring.
9. Apply grease to oil seals (5).
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3360
75
TX,33,GG2416 1921SEP983/3
21-111
