Having dismantled, wash, inspect and change the defective parts, if necessary.
Reassemble the universal joint as follows:
- Smear the inner surfaces of the needle bearings with grease Litol-24 and pack the needles into
the bearings;
- Fit the rubber sealing collars and holders, with the latter covering the collars, on the inserted
pins of the universal joint cross;
- Press in the needle bearings. See to it that the universal joint cross pin enters the bearing
without disturbing the needles and that the bearing is fitted not deeper than required for instal-
lation of the lock ring, as otherwise the cross will be gripped by the bearings;
- Fit on the circlips;
- Fit the drive shaft on the second pair of the cross pins, fit on the sealing collars and holders in
the same sequence, press in the bearings and mount the lock rings.
Dismantling and Reassembling the Final Drive
(With the drive shaft dislodged)
To dismantle the final drive (Fig. 66):
- Turn off the drain plug, drain oil, fill kerosene instead and by rotating the drive in both
directions wash the inner cavity, then drain kerosene;
- Remove the brake shoes (Fig. 66, Pos. 1);
- Unscrew the nut fastening the brake cam lever and by knocking slightly, drive the cam axle out
of the arm*;
- Unscrew the nuts fastening the casing cover, remove the washers and by slightly knocking
against the end of the driven gear hub, remove the cover together with gasket and the driven
bevel gear in assembly with the hub (Fig. 66, Pos. 2);
- Remove the rollers from the hub groove (45 pieces); (Fig.66, Pos.3)
- Remove the hub with the driven gear from the casing cover, inserting the rear wheel axle into
the central hole until the hub rests against the distance bushing and holding the hub by hand,
knock slightly against the axle end to press the cover from the bearing (Fig.66, Pos. 4)
- Press the ball bearing from the driven gear hub through the holes in the gear using a drift for
the purpose. Unscrew the nut fastening the pinion gear bearing by turning it clockwise (left-hand
thread) and remove the sealing ring; Take care to keep the bearing from cocking, when removing
(Fig.66, Pos. 5);
- Unscrew the nut fastening the pinion gear bearing by turning it clockwise (left-hand thread) and
remove the sealing ring (Fig.66, Pos. 6);
- Insert the wedge into the pinion gear shank slot, remove the pinion gear together with the
radial-thrust ball bearing, remove the packing and the shim (Fig.66, Pos.7);
- Take the needles out of the bearing on the pinion shank (Fig. 66, Pos. 8).
Replace defective parts.
Reverse the sequence of the operations, when reassembling the final drive. Prior to mounting the
needles into the bearings smear the fitting points with grease Litol-24 and keep the needles from
falling out when reinstalling the mating members.
The tightening torque should be: for the casing cover nuts -13.7-17.6 Nm; for the nuts
fastening the pinion bearing 68.6-88.2 Nm; reverse gear brake lever 22-28 Nm.
2. REPAIRING THE ASSEMBLY UNITS AND PARTS OF THE FINAL DRIVE
Keep in mind that positive and negative allowances between the mating members must fall in
with the values set forth by the Manufacturing Works during repair of assembly units and parts
and stipulated in Table 11.
To determine whether separate parts are fit for further service, refer to Table 12 which gives the
tolerated limits of clearances due to wear in the principal mating members.
* Do the above work in case of necessity; in reassembling ensure that angle of the rear brake lever deviation
back from the vertical centerline of the final drive is kept true within 33±5° as set during factory assembly.
70
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