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18 Owner Service
MAN0884 (08/15/2011)
4. Apply one pump of grease to each driveline u-joint
grease fitting.
5. Apply one pump of grease to each of the plastic
driveline shield bearings.
6. On the shear pin driveline, lubricate the shear yoke
with grease to prevent galling.
7. Periodically check the yokes on the front PTO.
Make sure the bolt and nut are tight and the yoke
is not moving on the gearbox shaft.
Driveline Shear Bolt Replacement
PTO drivelines are equipped with shear bolts to protect
against overloads.
■ Always use approved shear bolt as replace-
ment part. Using a hardened bolt or shear pin may
result in damage to driveline or gearbox.
■ Before proceeding, read and follow all safety
rules.
1. Disconnect driveline from tractor PTO shaft.
2. Remove gearbox shield by removing thumb
screws.
3. Remove damaged bolt from yoke on input shaft of
snow blower gearbox.
4. Rotate driveline to align holes in yoke and shaft.
Install new shear bolt and secure with lock nut.
Tighten to torque specification given on Torque
Chart.
5. Reinstall gearbox shield and reconnect driveline to
tractor PTO shaft.
Chain Maintenance
The auger chain should be inspected every 25 hours.
New chain has a tendency to stretch, so it is necessary
to check the chain tension to prevent flopping around,
thus causing potential problems. Chain tension is pre-
set at the factory. If chain becomes excessively loose,
it may be necessary to readjust the idler sprocket, Fig-
ure 10.
Figure 9. Drive Chain Lubrication
1. Apply grease to drive sprocket grease zerk (See
Figure 9).
2. Apply grease or oil to the drive chain regularly,
especially after using (See Figure 9).
NOTICE
■ Replacement chain should be only high quality
original equipment chain for longer life.
1. Remove auger drive shield (1) by removing 3/8
whiz nuts (3).
2. Loosen cap screw and nut on idler sprocket.
3. Move idler sprocket (7) to obtain 1/4 inch sag along
bottom span of chain.
4. Re-tighten idler sprocket and reinstall jackshaft
shield.
Figure 10. Auger Drive Chain Adjustment
WARNING
1. Auger Drive Shield
3. 3/8 NC Whiz Nut
7. Idler Sprocket