TM 5-3810-295-34
15-4. Cleaning, Inspection and Repair
NOTE
a. (Clean all metal parts in cleaning solvent, Federal
This spacer has a taper on the outer edge.
Specification P-D-680, or equivalent before inspecting.
Taper must face toward the tapered bearing.
Immerse parts in cleaning solvent and slush up and
d. Install inner tapered bearing (101) on the shaft
down slowly until all previous lubricant and foreign
with large diameter of taper outward. Install outer
material is dissolved and parts are thoroughly cleaned.
tapered bearing (101) on the shaft with large diameter
b. Remove bearing from cleaning solvent and strike
taper inward. Install outer tapered bearing cup (100)
larger side of cone flat against a block of wood to dis-
on the idler shaft, driving the outer tapered cup against
lodge solidified particles of lubricant. Immerse again in
the outer tapered bearing.
solvent to flush out particles. Repeat this procedure un-
e. Install idler bearing cap shims (47) and bearing
til bearings are clean.
cap (46). Install bolts (44) and lock washers (45).
c. Dry bearings with dry compressed air, being
Tighten bolts (44) to 47--65 ft-lb (63.7--88.1 N. m).
careful not to cause bearings to spin.
Adjust idler shaft taper bearing by adding or omitting
d. Clean interior and exterior of housing, sumps and
shims (47) to 0.0 to 0.003-inch end play.
covers, bearing caps, etc., thoroughly. All parts must be
f. Install ring (90) in the first and third shaft bear-
thoroughly dried immediately using dry compressed air
ing bore. Press double taper bearing (111) onto shaft
or soft, lintless wiping rags.
(96).
e. Replace all seals, packings, and gaskets.
CAUTION
f. Carefully inspect all rollers, cages and cups for
Bearings (111) are in matched sets. Under no
wear, chipping or nicks. Do not replace a cone or cup
circumstances may any of the four parts be
individually without replacing the mating cup or cone.
mixed with or exchanged with parts from
After inspection, dip bearings in transmission fluid
another set.
and wrap in clean lintless cloth or paper until installa-
g. Position gear (98) in the transmission case. Install
tion.
spacer (97) on the shaft against the taper bearing as-
g. If available, inspect gears and shafts using the
sembly. Insert the assembled shaft into bore of case
through gear (98), from the side indicated. Using a
wear, chipping, pitting, nicks and burrs, cracks and
suitable pusher tool, push the shaft assembly into the
scoring. If gear teeth show evidence of wearing through
case until the taper bearing shoulders against the
case hardened finish, replace the gear. Small nicks may
locating ring in the bore of the case. Do not remove the
be removed with a suitable hone.
pusher tool at this time.
h. Inspect shafts to assure that they are not sprung
h. Install spacer (92) against gear (98). Install roller
or bent, have no twisted splines and that shafts are
bearing (109) on the shaft and drive the bearing into
true. Replace any shaft showing evidence of the above.
place. Drive the bearing in until spacer (97) cannot be
i. Inspect housing, covers and bearing caps to
turned by hand. Do not attempt to draw the bearing
assure
tight with bearing lock nut. Remove shaft pusher tool.
that they are thoroughly cleaned and that mating sur-
i. Install ring (90) into second and fourth shaft bear-
faces, bearing bores, etc., are free of nicks and burrs.
ing bore. Press double taper bearing (111) onto shaft
Check all parts carefully for evidence of cracks,
(91). Do not mix or substitute bearing parts with
fatigue, or other conditions that would cause subse-
another set. These parts are matched. Position gear
quent oil leaks or failures.
(99) in transmission case with long offset of gear hub
toward the input side of the case. Insert shaft (91) into
15-5. Reassembly
bore and through gear (99). Push shaft assembly into
a. Refer to figure 15-1. Note that the drive shafts
the case until bearing (ll1) shoulders against the locat-
must be installed in the following order: idler shaft,
ing ring. Do not remove the pushing tool at this time.
first and third shaft, second and fourth shaft, output
j. On opposite end of the shaft, install long gear
shaft, reverse shaft, and the input shaft
spacer (93) on the shaft against gear (99). Install
b. Install ring (103) and baffle (104) in idler bearing
spacer (92) against the long spacer (93). Install roller
bore. This must be done from the inside of the housing.
bearing (109) on the shaft and drive into place until
The flanged oil baffle (104) must be one-eighth of an
spacer (93) cannot be turned by hand. Do not attempt
inch from the bearing locating ring (103).
to draw bearing tight with bearing lock nuts. Remove
c. Install inner bearing cup (100) in the idler bearing
shaft pusher tool.
bore. Press roller bearing (106) onto idler shaft (105).
k. Install first and second clutch supports (62) and
Install the bearing and shaft into the housing from the
secure with screws (61). Tighten bolts to 70--85 ft-lb
(94.9-115.2 N m). Install expander springs (57) and
side indicated (opposite side of inner bearing cone). In-
stall spacer (102) on the shaft from the tapered bearing
piston rings (58).
side of the shaft.
15-11
