Maintenance
25
Replacing the Scraper Blade
The scraper blade contacts the ground preventing
damage to the snowthrower housing. Periodically
inspect the scraper blade for wear. When scraper
becomes worn, before working surface contacts the
housing, replace the scraper blade.
1.
Disengage the power take off (PTO), set the
parking brake, raise the attachment lift, and turn
the ignition key to “STOP” to stop the engine.
Remove the ignition key.
2.
Support the snowthrower housing off the
ground.
3.
Remove nuts, washers, carriage bolts and scraper
blade (Fig. 48).
4.
Replace scraper blade and install with previously
removed hardware (Fig. 48).
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Figure 48
1.
Nut
2.
Washer
3.
Carriage bolt
4.
Scraper blade
Adjusting Drive Chain Tension
Check the drive chain tension after every 25 operating
hours or once a year, whichever occurs first. Adjust as
necessary to maintain proper tension.
1.
Disengage the power take off (PTO), set the
parking brake, lower the attachment lift, and turn
the ignition key to “STOP” to stop the engine.
Remove the ignition key.
2.
To adjust, loosen the nut that secures the idler
sprocket. (Fig. 49).
3.
Slide the idler sprocket in the adjustment slot
until the chain is snug, but not tight (1/8” to 1/2”
deflection of the chain in the area indicated in
Figure 49) and torque the nut securing the
sprocket to 67 to 83 ft lbs (90.8 to 112.5 Nm).
IMPORTANT: Do not overtighten the chain
or excessive wear will occur.
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Figure 49
1.
Drive chain
2.
Idler sprocket
3.
Adjustment slot
4.
Check deflection here
