Driveshaft Universal Joint Replacement
1. Remove the driveshaft. (See Driveshaft Removal and
Installation in this section of the book.)
2. Separate the two sections of the driveshaft.
3. Use a press or large vise to remove the cross and
b
earings by putting a small socket against one roller and
a large socket against the yoke on the opposite side. As
the vise is closed, the small socket will force the cross
to push the opposite roller part way into the large socket.
4. When the roller is forced part way out, grasp the roller
and
strike the yoke to complete removal. DO NOT spill
the needle bearings.
5. When replacing the U-joint, pack the roller bearings
wit
h multi-purpose grease. Pack carefully to eliminate
trapped air. Install seals.
6. Start one of the rollers in the yoke. Insert from the
botto
m with the open side of the roller up to prevent loss
of the needles. Make sure that each roller contains all
of the needles.
7. Insert one of the cross trunnions into the roller. Start
the
other roller making certain it slips over the trunnion.
8. When partially seated, put the two rollers between the
v
ise jaws. Squeeze until FLUSH with the yoke. Stop
when flush; DO NOT OVER-TIGHTEN.
9. Tap on each roller until fully seated (use a brass drift
o
r socket that is the full width of the roller.
10. Grease the fitting SLOWLY until it starts to show at
the seals. Use a low pressure hand grease gun or a
power gun equipped with a pressure relief valve. A high
pressure grease gun can blow the rollers out of the
yokes with the tremendous pressure; seals may also be
damaged.
11. Test the action of the assembled joint. It should move
thr
oughout its range without binding. If a slight bind
exists, hit the yoke lugs with a soft hammer. this will
usually free the joint. If it does not, disassemble and
check for the source of binding.
Figure 13
Figure 14
PTO System
Groundsmaster
®
455-D Page 7 - 13 Repairs
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