Maintenance Instructions

REPLACING/REPAIRING/ ADJUSTMENTS

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 replacement. 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.

Shear Pin

Split Spring Pin

U-Joint

Tube Assembly

U-Joint

Shaft Assembly

Cotter Pin

PTO Shear Pin

IMPORTANT: Use only Walker P/N 8067-10 shear pins for replacement to provide proper shock protection -- 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 oper- ation.

ADJUSTMENTS

WARNING

DO NOT attempt to make any adjustments with the tractor engine running. Disengage the PTO clutch, stop the en- gine, and remove the ignition key. Wait for all movement to stop before getting off the seat.

Drive Chain Tension

The drive chain should have 1/4 to 1/2 in. (6 to 13

mm)of slack at midspan. Remove the chain guard cover to check slack. Adjust the drive chain as fol- lows:

1.Loosen the chain tension block mounting nut and bolt.

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