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GB - 24
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).
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
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 4–1/2 ± 1/8 in
(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 4–6 until attachment clutch
distance and brake contact are correct.
IMPORTANT: If attachment clutch/brake
cannot be adjusted within tolerances, see your
Dealer for repairs.
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.
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.