Snapper 860 Operator's Manual page 26

DRIVE BELT ADJUSTMENT
If the auger drive slips (auger slows or doesn't rotate nor-
mally while blowing snow), or stays engaged when the
control is disengaged — and the auger clutch cable has
been properly adjusted — the auger drive belt may be
out of adjustment.
WARNING
Auger must NOT rotate unless the Auger Control
lever has been depressed. Proper Auger Drive
Belt adjustments stop the auger within 5 seconds
after the Auger Control is disengaged.
Checking Auger Belt & Belt Guide
Adjustments
1. Insert the engine key and start the snowthrower.
2. Engage and disengage the auger control a series of
ten times, checking that the auger comes to a com-
plete stop within 5 seconds after the control is disen-
gaged each time.
3. If the auger comes to a complete stop each time with-
in 5 seconds, the adjustment is correct. If the auger
does NOT come to a complete stop within the neces-
sary 5 seconds, the adjustment is incorrect: readjust-
ing the auger belt & belt guide according to the pro-
cedures below.
Adjusting Auger Drive Belt
1. Make certain that the snowthrower is off, the engine
key has been removed, and the spark plug discon-
nected.
2. Check that there is no slack in the auger drive clutch
cable (see Figure 26). If there is, follow the auger
drive clutch cable Adjustment procedure on page 24.
3. Measure the length of the auger drive clutch spring
(Figure 26).
4. Fully depress the auger control and measure the
expanded length of the spring.
The spring should expand 19/64"-5/16". If the spring
deflection is less than 19/64"-5/16" the auger idler
pulley must be adjusted. Proceed to step 5.
5. Loosen the belt cover screws and remove the belt
cover (Figure 25)
6. Loosen the adjustment bolt (see Figure 27) and move
the auger idler pulley.
7. Tighten the adjustment bolt and repeat steps 3-4.
8. Test run the unit. The auger must NOT rotate unless
the auger control lever has been depressed. Proper
auger drive belt adjustments stop the auger within 5
seconds after the auger control is disengaged. If the
auger drive fails either of these tests, repeat the
(Continued)
Auger Control
Belt Cover
Figure 25. Auger Control and Belt Cover Location
Auger Drive
Clutch Cable
Adjustment
Hex Nut
Measure Spring
Length, Spring
Should Expand
5/16" When Auger
is Engaged
Figure 26. Auger Drive Clutch Cable
Auger Idler
Pulley
Auger Idler
Adjustment
Figure 27. Auger Drive Belt, Guide and Pulley
adjustment procedures.
9. After adjusting the auger drive belt, the auger belt
guide MUST BE adjusted according to the Adjusting
Auger Belt Guide procedure which follows.
25
Idler Rod
Arm
Bolt
Adjustments
Right Handle
Auger
Drive Belt