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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Scraper Blade
Inspect the scraper blade for wear or damage before
each use. The blade is hardened and if the gauge
wheels (or skid shoes) are properly adjusted, the blade
should give a reasonable amount of service before re-
placement. The blade should be replaced before it has
worn down to the point where the blade mount on the
housing is dragging and wearing.
IMPORTANT: Continued operation with a worn out
scraper blade and/or improperly adjusted gauge
wheels will result in severe damage to the lower portion
of the snowblower housing.
The scraper blade is replaced by removing seven (7)
1/4-20 x 3/4 carriage bolts and nuts.
Flexible Coupling Spider
Inspect the flexible coupling spider after every 25
hours of operation. If the elastomeric media shows
signs of wear, cracking or deterioration, the spider
should be replaced. Refer to Gearbox Replacement
in this section for removing and replacing the spider.
U-Joint Shear Pin (After S/N 99-1042)
In case of sudden stoppage of the auger, the PTO
U-joint connection to the gearbox has a shear pin to
provide shock load protection to the drivetrain. When
the PTO pin has sheared, use the following procedure
to replace it:
1. Remove the gearbox cover. Two (2) bolts (one on
each side) fasten the cover.
2. Rotate U-joint on shaft to align the shear pin hole
with the hole (and shear pin fragment) in the shaft.
Use a punch to drive the remaining portion of the
old shear pin out.
3. Install new shear pin and secure with cotter pin.
PTO Shear Pin
IMPORTANT: Use only Walker P/N 8067-10 shear
pins for replacement to provide proper shock pro-
tection -- these pins are hardened to shear under a
specific amount of load.
4. Reinstall the gearbox cover.
Before operating the blower after the shear pin has
been replaced, inspect the auger flighting and paddle
blades for damage. Also inspect the gearbox and chain
drive for any damage. Make sure the auger turns
smoothly and freely before resuming operation.
Cotter Pin
U-Joint
Tube Assembly
Shear Pin
Split Spring Pin
U-Joint
Shaft Assembly
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