TM 5-3810-294-34
KEY to fig. 5-8.
13. Lever
26. Spider
1. Rivet (20)
14. Trunnion
27. Lockwasher
2. Clutch lining (2)
15. Nut (3)
28. Capscrew
3. Clutch band (2)
16. Adjusting pushrod
29. Band guide
4. Spring
17. Lever
30. Lockwasher(2)
5. Plate (2)
18. Keeper plate
31. Capscrew (4)
6. Plate
19. Lockwasher
32. Boot
7. Capscrew (2)
20. Capscrew
33. Piston
8. Lockwasher (2)
21. Cotter pin
34. Cup
9. Nut (2)
22. Washer
35. Spring seat
10. Pin
23. Bushing
36. Spring
11. Cotter pin
24. Capscrew
37. Cylinder body
12. Washer
25. Nut
38. Bleeder fitting
moving either left or right. Install shaft (21) in the drum,
5-28. Inspection and Repair
prepack bearings (13 and 22) with GAA grease, and install
a. Clean all parts using a suitable solvent.
bearings on the shaft. Bearings must bear firmly against the
b. Replace all seals, gaskets, deformed shims
shoulders on shaft (21). Apply force to inner races only.
and other expendable parts.
b. Lubricate all seals (6, 10, 23, and 25) with GAA grease.
c. Inspect all parts for wear, scoring, cracks, any
Install the seals in their respective retainers. Note that seal
other visible signs of damage, and replace any parts not
(23) must be installed in drum (18) bore.
in good condition. Inspect gear teeth for severe wear,
c. Install retainer (11) and gasket (12) with capscrews
pitting, and for excessive tooth shortening. Pay particular
(8) and lockwashers (9). Seal (10) will be installed with the
attention to the roots of gear teeth to be sure no cracks
retainer.
are developing.
d. Install clutch assembly (7), being careful not to
d. Inspect and smooth all seal seating surfaces with a
damage seal (10) as the clutch spider hub is pressed into
fine oil stone or crocus cloth. The seal seating surfaces
position against bearing (13).
must be smooth, or rapid and severe wear of oil seals
e.Install retainer (5) with seal (6) in place on the hub of
will develop.
clutch (7) spider. Heat and install the inner race of bearing
e. Although the sprocket and chain 'which drive
(4) on the shaft (21), making sure the race butts firmly
the rear drumshaft are removed from the drum-shaft
against the clutch spider hub. Prepack inner race of
during removal of the assembly, it should be noted that a
bearing (4) with GAA grease. Install keyed washer (3),
worn sprocket should be replaced. In that event, always
lockwasher (2), and nut (1). Place outer race of bearing (4)
replace the drive chain also because a worn chain will
over the inner race to prevent foreign material from entering
quickly wear a new unworn, sprocket.
the lubricant.
f. Repair clutch as follows:
f. Install gear (24), making sure the gear hub Is firmly
(1) When clutch lining (2, fig. 5-8) is worn to
against bearing (22). Note that item (23) is a seal and that
within 1/ 16 inch of rivets (1) at any point, the lining must
the gear hub extends through the seal. Avoid seal damage
be replaced. Drill out rivets and install new linings.
when installing the gear.
(2) If hydraulic cylinder (items 32 through 38)
g. Install retainer (26) with seal (25) in place on shaft
leaks, boot (32) and cup (34) can be replaced. If this
(21). Heat and install the inner race of bearing (27), forcing
does not repair the leak, the cylinder must be replaced
inner race firmly against the hub of gear (24). Prepack
as a unit.
bearing inner race with GAA grease and slide the outer race
(3) If wear on clutch linings (2) is apparent only
of the bearing over the inner race to keep the lubricant
one end of a lining, which is normally the case, the
clean. This completes bench assembly, assuming that the
linings may be reversed and reinstalled without relining,
drum is to be reinstalled in the machine.
thus doubling the clutch lining life.
5-30. Installation
(4) All items should be inspected for signs
Refer to paragraph 2-15 and install the rear drumshaft. Be
damage. Items with damaged threads must replaced.
sure to line up the marked hole in the clutch spider with the
Spring (4) should be compared with new spring. If
hole in the shaft to assure proper lubrication of shaft
cracks, elongation, or deformation are apparent, replace
bearings. Also, be sure to install the elbow, coupling, and
the spring.
nipple shown on figure 2-6.
(5) Another plate (6) can be added if lining still
available, but adjustment from push rod (1 has been
used up.
5-29. Reassembly
a. Block drum (18, fig. 5-7) to prevent it from
5-18
