TM 5-3895-359-14&P
chain. Retighten bolts (J). Replace cover (C), add oil to
7. Disassembly of bearing housing assembly
level plug (U) and replace top cover.
Remove lock plate (L) by removing three cap screws (K).
ROTOR AND JACK AXLE REMOVAL
Pull sprocket (M) off end shaft. Remove spacer (N). Pull
housing (H) with bearing (P) and oil seals (R) off end shaft
1. Follow steps for Hood Removal and remove hood.
(B). Remove spacers (S) and (T). Seals (R) and bearing
2. Place blocking under the jack axle differential case
(P) may now be removed from housing. Note that the
to retain case from falling. Remove the rotor lift bar from
seal lips face opposite each other. Inspect and replace
the differential case.
worn or damaged parts. Soak new seals in oil before
3. Remove four bolts holding the driveline flange to
assembly.
the differential case.
8. Assembly of bearing housing material Place end
4. Remove eight bolts(4 each side)holding rotor arms
shaft (B) on bench with shaft end up. See view "A" of
to the jack axle.
figure 3. Slip spacer (T) on shaft and follow with spacer
5. Machine may now be driven away from rotor.
(S) with chamfer of spacer facing splines.
Before
proceeding, hand pack cavity "AA" with chassis, grease to
ROTOR DRIVE PROPELLER SHAFTS REPLACEMENT
prevent dirt from entering this area which may cause seal
FRONT SHAFT REPLACEMENT
and/or bearing failure. Press seals (R) into housing (H)
1. Remove the two U-bolts that attach the front of
with the seal lips facing opposite each other, then
shaft to the end yoke of rotor drive transmission.
assemble housing on end shaft being careful not to
2. Remove the two U-bolts that attach the rear of
rupture seals on the spacer. Follow with bearing (P),
shaft to end yoke of intermediate shaft.
spacer (N), sprocket (M) with lock plate and cap screws.
3. Remove shaft by sliding slip yoke and pulling shaft
Thread wire thru cap screw holes and tie.
down. Installation is the reverse procedure.
NOTE:
Use
Permatex
on
gaskets
in
REAR SHAFT REPLACEMENT
reassembly.
1. Remove the two U-bolts that attach the front of
shaft to the end yoke of the intermediate shaft.
9. Using a new gasket (Q) install the end shaft
2. Remove the two U-bolts that attach the rear of
material assembly to the chain case locating the eccentric
shaft to the end yoke of the traction drive axle.
set of holes in such a manner that when the chain is
3. Remove shaft by sliding slip yoke and pulling shaft
connected, the chain will be loose. Using two of cap
down. Installation is the reverse procedure.
screws (J), opposite each other, temporarily bolt housing
to case. Reconnect the chain. Remove the two bolts,
INTERMEDIATE SHAFT REPLACEMENT
rotate housing to tighten chain and to match marks
1. Disconnect the front and rear propeller shafts by
previously made. Refer to following paragraph "Chain
removing the U-bolts from both ends of the intermediate
Adjustment" if chain is to be tightened.
shaft.
2. Place a support under the pillow block bearing
10. Replace chain case side covers. Remove oil level
assemblies.
plug (U). Fill case to this level with
3. Remove the four bolts and nuts that attach the
HD80-90
-30
F
pillow block assemblies to the frame.
HD140
+30
F
4. Remove support and shaft assembly installation is
Replace plug and top cover.
the reverse procedure.
11. Reinstall rotor to the rotor end shafts. Torque cap
screws (A) to 100 ft. lbs. (approx.).
PILLOW BLOCK BEARING REPLACEMENT
After the intermediate shaft has been removed from
CHAIN ADJUSTMENT, END DRIVE CASE (Fig. 3)
vehicle, the pillow block bearing assemblies can be
Periodic inspection for chain tightness should be made to
removed.
retain the chain at the correct tightness. Inspection can be
1. Remove the locking bolt from the end yoke of
made by removing side cover (C). A certain amount of oil
either end of the intermediate shaft.
will be lost by removing the cover. Each drive chain must
be tightened a like amount and to have a droop of 2/2" on
2. Pull the end yoke off the splines of the shaft.
the slack side. Do not overtighten as this will excessively
3. Loosen the two set screws on the pillow block and
preload the bearings. Bearing housing (H) is made with
turn locking collar until pillow block is free to slide off of
an eccentric set of holes, that by rotating the bearing
shaft.
housing (clockwise, L. H. side) and (counterclockwise R.
NOTE:
H. side) standing at the outside of the end case, the chain
Pillow block locking collar will turn in
may be tightened. Loosen bolts (J) until they are free
one direction only. Installation is the
from the end case. Rotate bearing housing (H), as
reverse procedure.
described above, one hole or more if required to tighten
1-3
