Walker IMPLEMENT HITCH SB6670 - Manual (Page 60)

Maintenance Instructions
REPLACING/REPAIRING
60
Snowblower Cutting Edge Replacement
Two-Stage Snowblower Gearbox
Remove and replace the gearbox as follows:
1. Stop the tractor engine, set the parking brake,
and remove the ignition key.
Replace Snowblower Gearbox
2. Remove the three (3) 5/16 nuts and the three
(3) 5/16 x 3/4 bolts holding the bearing flanges
on each end of the snowblower. Loosen the (2)
two set screws on each collar bearing.
3. Remove the 5/16 nut and the 5/16 x 2 hex pin-
ion shaft bolt.
4. Remove the two (2) 5/16-NC nylon locknuts and
the two (2) 5/16-NC x 1-1/4 in. hex bolts fasten-
ing the support bracket and gearbox to the
snowblower frame.
5. Hold and move the gearbox/auger assembly to
the left and the right side will slide out. Slide the
left side out.
6. Remove the two (2) 5/16-18 auger shear bolts
and two (2) 5/16 nuts. Remove augers from
gearbox/shaft assembly.
7. Replace the gearbox by reversing the removal
procedures.
Two-Stage Snowblower Reduction Chain
The reduction chain should be replaced if, when ad-
justed properly, it can be pulled away from the front
of the reduction sprocket more than 1/2 the height
of a tooth on the sprocket. Running the snow-
blower with a worn chain increases wear on the
sprockets.
1. Remove the 1/4 x 7-1/2 in. bolt, lock washer,
and nut from the reduction box cover.
2. Remove the box cover from the reduction box.
Remove Reduction Box Cover
3. Turn the reduction box drive shaft until the mas-
ter link for the chain is accessible.
4. Remove the master link from the chain and re-
move the chain from the sprocket.
5. Place the new chain on the sprockets and install
the master link. Install the clip on the master link
properly. The closed end of the clip should
point in the direction of chain travel.
Reversible
Cutting Edge
Shaft
Assembly
Collar
Bearing
Screw
Pinion
Shaft
Bolt
Support
Bracket
Auger Shear
Bolt
Bearing Flange Bolt
Auger
Gearbox
Reduction
Chain