NMC-WOLLARD MB-4 200-DF, Operation, Maintenance And Parts Manual

Page: 88 / 321

5. Reattach wheel/tire assemblies and
torque bolts to 400 ft-lbs (dry).
9.5 DRIVE SHAFT AND U-JOINT REPAIR
A drive shaft at front and one at rear trans-
mits torque from the transmission to each
axle assembly. Universal joints at each end
of the drive shaft compensate for any angu-
lar misalignment between the transmission
and the axle.
Repair of the drive shaft assembly is limited
to replacing universal joints, the slip joint
components, or the complete drive shaft.
9.5.1 Removal
1. Chock wheels so tractor does not move.
Place transmission in neutral.
2. Remove four capscrews securing each
end of driveshaft.
3. Carefully strike the yoke to push drive
shaft slip joint together. Remove drive
shaft assembly from tractor. Be careful
not to allow bearing caps to fall off spider.
9.5.2 Installation
1. Install drive shaft assembly and secure
with capscrews and lock washers.
2. Grease universal joints with a high-quality
grease (MIL-G-10924).
9.5.3 Universal Joint Repair
9.5.3.1 Removal–Flange Yoke End
1. Match mark the flange yoke bearing caps
and spider to ensure that bearings are as-
sembled on same spider journals.
2. Remove retaining ring clips securing
bearing caps to flange yoke and separate
flange yoke from drive shaft.
3. Support drive shaft in a way that will al-
low bearings to be pressed from yoke
without interference.
4. Using a short piece of pipe or a solid rod
(about same diameter as bearing cap)
and a hydraulic press, press a bearing
cap until spider bottoms on yoke.
5. Use a hammer to tap loosened bearing
cap from yoke.
6. Turn drive shaft over and repeat steps 4
and 5 to remove remaining bearing cap.
9.5.3.2 Removal–Slip Yoke End
1. Loosen slip yoke dust cap and remove
slip yoke from drive shaft.
2. Remove retaining rings securing bear-
ing caps in slip yoke.
3. Repeat previous steps 3-6 under
`Flange Yoke End’ to disassemble uni-
versal joint.
9.5.3.3 Assembly–Slip Yoke End
1. Clean and inspect yokes for damage
and replace if necessary.
2. Apply automotive grease to new needle
bearings to retain them in caps.
3. Start one of the caps into slip yoke bear-
ing bore.
IMPORTANT: Protect bearings before in-
stallation and handle carefully during in-
stallation to prevent entry of dirt or other
foreign matter into bearings.
4. Pack grease passage in spider with au-
tomotive type grease before installa-
tion.
5. Install new seals on spider journals.
M200 MB4 Tow Tractor Manual No. 42975
PAGE 9-4
JULY 31, 2006