TRACTION DRIVE BELT
REPLACEMENT
NOTE: Housing and frame must be tipped apart and attachment drive belt removed from engine sheave in order to change traction drive belt (Figures 14 & 15).
CAUTION: Always support Sno- Thro frame and blower housing when loosening the cap screws holding them together. Never loosen cap screws while unit is in service position.
1.Remove attachment drive belt (See Remove Attachment Drive Belt).
2.Pull idler away from traction drive belt and remove belt from idler, camshaft pulley and driven pulley (it may be necessary to turn camshaft pulley using recoil starter handle).
NOTE: To gain clearance, engage traction clutch and if necessary pull back attachment idler arm clevis pin.
3.Replace traction drive belt making sure pulleys align. If alignment is necessary, loosen camshaft pulley set screws, reposition pulley and retighten set screws.
4.Replace attachment drive belt (See Replace Attachment Drive Belt).
ATTACHMENT CLUTCH/BRAKE ADJUSTMENT
WARNING: IMPROPER ADJUSTMENT could result in unexpected movement of auger and impeller causing death or serious injury. Auger / impeller must stop within 3 seconds when Attachment Clutch/Impeller Brake lever is released.
WARNING: Adjustment procedure requires the engine to be run with the belt cover off. Read, understand and follow all Operational, Fuel and Maintenance and Service Safety Rules before adjusting your unit.
1.Remove belt cover.
2.Check belt alignment (Figure 15).
Engine sheave and attachment pulley must align vertically. Also, belt must be centered in the idler pulley.
To align, move engine sheave: a.Loosen set screws.
b. Slide sheave and key to desired position.
c.Tighten set screws. 3. Adjust cable slack.
IMPORTANT: The clutch cable must be slack when lever is disengaged.
a.With the clutch lever disengaged, loosen control cable mounting nuts (Figure 18).
b. Pull up on cable body to remove cable slack.
c.Finger tighten mounting nuts, and then loosen the top nut two turns.
d.Tighten the bottom nut with a wrench.
4.Check attachment clutch lever measurement.
a.Start engine and run at full throttle.
b.Slowly squeeze the attachment clutch lever until auger shaft begins to rotate.
c.Measure the distance from the end of the clutch lever to the hand grip as shown in Figure 17. The distance between the clutch lever and the hand grip should be
(11.43 ± 3 mm).
d.Shut off engine.
5.Adjust attachment clutch lever measurement, if necessary.
NOTE: 1/16 in (1.6 mm) idler movement will change clutch lever measurement about 1/4 in (6 mm).
a.Loosen idler nut (Figure 15).
b. To increase distance between clutch lever and hand grip, move the idler towards the attachment belt.
c.To decrease the distance between the clutch lever and hand grip, move the idler away from the attachment belt.
d.Tighten idler adjustment nut.
e. Check clutch lever measurement.
6.Check Brake
When the clutch lever is disengaged, the brake must contact the attachment belt.
When the clutch lever is engaged, the brake must be more than 1/16 in (1.6 mm) away from the belt (Figure 16).
7.Repeat steps
IMPORTANT: If attachment clutch/brake cannot be adjusted within tolerances, see your Dealer for repairs.
GB - 24