WILLYS MODEL "MB" %-TON
4
x
4
GOVERNMENT TRUCK
0900-83
PROPELLER SHAFTS AND UNIVERSAL JOINTS
The drive from the transmission to the front and
rear axles is accomplished through a propeller
sliaft and two universa1 joints. Fig.
1.
The splined slip joint at one end of each shaft
allows for variations in
distance between the trans-
fer case and
the,front and rear axle units due to
spring
action.
The slip joint is marked with arrows at the spline
..
.
and the sleeve yoke. Note markinps to facilitate
proper
assembÏy so the yokes of-the universa!
ioints at front and
rear of sliaft are in tlie Same
plane when assembled, Fig.
2.
The propeller shaft connecting the transfer case
with the front axle
lias the
"U"
bolt type dniversal
joint at both ends.
The rear propeller shaft is equipped with the
"U" bolt type joint at tlie
rear wliere it attaches
to the
rear axle. The front universa1 joint is the
snap ring type.
These
iiniversal joints are the Needle Bearing
type and are so designed that correct assembly is
a
very simple matter. No hand fitting or special
tools are required.
The journal trunnion and needle bearing assem-
blies are
the only parts subject to wear, and wlien
..
it becomes neceaary to replace these parts, the
propeller shaft
s'hould be removed from the vehicle.
FIG.
l-PROPELLER SHAFT ASSEMBLY
Disassembling of Snap Ring Universa1 Joints
To remove snap rings pinch ends together with
a pair of pliers. If the ring does not readily snap out
of the groove tap the end of the bearing lightly,
this
wil1 relieve pressure against the ring. See Fig.
3.
Drive on the end of one bearing until the opposite
bearing is pushed out of the yoke.
Turn tlie joint
over and drive the first bearing back out of its
lug by driving on the exposed end of the journal
shaft. Use a soft round drift with a flat face about
x{'
smaller in diameter than the hole in the yoke,
otherwise there is danger of damaging the bearing.
Repeat this operation for the other two bearings,
then lift out journal assembly, sliding to one
side
and tilting over the top of the yoke lug.
Wash
al1 parts in cleaning solution and if parts
are not worn, lubricate with a good grade of
semi-
fluid lubricant, see Lubrication Chart, Page
12.
Make sure the reservoir in each journal trunnion is
filled. Put the rollers in the race and fill the race
about one-third full. It is advisable to install new
gaskets, No.
2,
Fig.
4
on the journal assembly.
FIG.
2-ARROW MARKING
Reassembling of Snap Ring Universa1 Joints
Reassembling is merely a reversal of the dis-
mantling operation. Hold the bearing in a vertical
position to prevent needles from dropping out of
bearing race when installing in joint.
When assembled,
if joint appears to bind tap
the
lugs lightly with a hammer which wil1 relieve
any pressure on the bearings at the end of the
journal.
When inserting the spline of the propeller shaft
into the universal joint be sure that the arrows on
the propeller shaft and yoke sleeve are in line. See
Fig.
2.
Disassembly of
"U"
Bolt
Type Universa1 Joint
Removal of the
"U"
Bolts at axle and trans-
mission end yoke allows the complete propeller
shaft assembly to be removed.
After removing
"U"
bolt slide sleeve yoke
(slip joint) towards the shaft which
wil1 allow the
bearing race to
come out from behind the shoulders
on end yoke. Care should be taken to hold bearing
races in place to avoid losing the rollers.
Now
remove snap Iock ring, No.
1,
Fig.
4
in the
sleeve yoke at front and stud
bal1 yoke at rear end
of shaft by pinching ends together with a pair of
pliers. If a ring does not snap readily out of the
groove, tap the end of the bearing lightly, which
wil1 relieve tlie pressure against the ring.
Drive on the end of one bearing until the
opposite
bearing is pushed out of the yoke. Turn the uni-
versal joint over and drive the first bearing out
by driving on the exposed end of the journal
assembly. Use a soft round drift with a flat face
about
$&"
smaller in diameter than tlie hole in the
yoke, otherwise there is danger of damaging the
bearing..
Now lift out journal assembly by sliding to one
side and tilting over the top of the yoke lug. Clean
al1 parts and
if
parts are not worn, repack with
a
good grade of semi-fluid lubricant, see Lubrica-
tion Chart. Page
12.
Make sure the reservoir in the
end of each trunnion is filled. With the rollers in
the race, fill tlie race about one-third full. It is
ad-
visable to install Iiew gaskets on journal assembly.
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