Murray 6291490X54 Instruction Book page 13

How To Adjust The Auger Drive Belt
If the snow thrower will not discharge snow,
check the adjustment of the auger drive cable.
See "How To Check And Adjust The Cables" in
the Maintenance section. If the adjustment is
correct, then check the condition of the auger
drive belt. If the auger drive belt is damaged,
replace the auger drive belt. See "How To
Replace The Belts" in the Maintenance section.
If the auger drive belt is loose, adjust as follows.
1. Disconnect the spark plug wire.
2. (Figure 21) Remove screw (2) from belt
cover (1). Remove the belt cover (1).
3. (Figure 22) Loosen the nut (2) on the idler
pulley (3). Move the idler pulley (3) 1/8 inch
(3 mm) toward the auger drive belt (4).
4. Tighten the nut (2).
5. (Figure 24) Depress the auger drive lever.
Check the tension on the auger drive belt
(4). In correct adjustment, the auger drive
belt (4) will deflect 1/2 inch (12.5 mm) (5)
with moderate pressure. If the adjustment is
not correct, repeat the adjustment.
6. (Figure 21) Install the belt cover (1). Tighten
screw (2).
7. Check the adjustment of the auger drive
cable. See "How To Check And Adjust The
Cables" in the Maintenance section.
8. Attach the spark plug wire.
How To Adjust The Traction Drive Belt
After approximately ten hours of operation, a
new belt will stretch and require an adjustment
of the belt tension. Also, if your snow thrower
experiences a loss of power under heavy load,
check the condition of the traction drive belt. If it
is damaged or loose, replace it (see "How To
Replace The Belts" in this section of the
manual).
1. Disconnect the spark plug wire.
2. Unlock both left and right wheel locks. See
"How To Use The Wheel Lockout" in the
Operation section.
3. (Figure 21) Remove screw (2) from belt
cover (1). Remove the belt cover (1).
4. (Figure 22) Loosen the nut on the traction
idler pulley (12). Move the traction idler
pulley (12) 1/8 inch (3 mm) toward the
traction drive belt (13).
5. Tighten the nut (2).
6. (Figure 24) Depress the traction drive lever.
Check the tension on the traction drive belt
(4). In correct adjustment, the traction drive
belt (4) will deflect 1/2 inch (12.5 mm) (5)
with moderate pressure. If the adjustment is
not correct, repeat the adjustment.
DO NOT over tighten belt. If the belt
is too tight, the drive will not
disengage. Before operating, check
the belt tension following the instructions
in step 8.
7. (Figure 21) Install the belt cover (1). Tighten
screw (2).
8. Attach the spark plug wire. Before operation,
check the belt tension as follows:
a. Unlock both left and right wheel locks.
See "How To Use The Wheel Lockouts" in
the Operation section.
b. Move the shift lever to NEUTRAL
position.
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c. DO NOT engage the traction drive lever.
d. Start the engine.
e. Slowly move the shift lever forward.
Watch the axles for rotation. If the axles
rotate, the traction drive belt is too tight.
f. If the belt is too tight, again adjust the
belt. After each adjustment, check the
belt tension before operating.
9. In correct adjustment, the snow thrower will
not experience a loss of power under heavy
load and the drive will automatically
disengage when the traction drive lever is
released.
How To Replace The Belts
The drive belts are of special construction and
must be replaced with original factory
replacement belts available from your nearest
authorized service center.
Some steps require the assistance of a second
person.
How To Remove the Auger Drive Belt
If the auger drive belt is damaged, the snow
thrower will not discharge snow. Replace the
damaged belt as follows.
1. Disconnect the spark plug wire.
2. (Figure 25) Remove the bolts (1) on each
side of the bottom panel (2).
3. Loosen the bolts (3) on each side of the
bottom panel (2).
4. Remove the bottom panel (2).
5. (Figure 21) Remove screw (2) from belt
cover (1). Remove the belt cover (1).
6. (Figure 22) Loosen the belt guide (9). Pull
the belt guide (9) away from the stack
pulley (10).
7. Pull the idler pulley (3) away from the auger
drive belt (4) and slip the auger drive belt
(4) off of the idler pulley (3).
8. Remove the auger drive belt (4) from the
engine pulley (11). To remove the auger
drive belt (4), the engine pulley (11) may
have to be partially rotated.
9. (Figure 23) Remove the top four bolts (21)
that hold together the auger housing (22)
and the motor box (23). Loosen the bottom
two bolts (24). The auger housing (22) and
the motor box (23) can now be split apart for
removal of the belt.
10. (Figure 22) Remove the old auger drive
belt (4) from the auger drive pulley (10).
Replace the auger drive belt (4) with an
original factory replacement belt available
from an authorized service center.
11. Install the new auger drive belt (4) onto the
auger drive pulley (10).
12. Assemble the auger housing (22) to the
motor box (23) with the four bolts (21) that
were removed in step 9. Tighten the bottom
two bolts (24).
13. Install the auger drive belt (4) onto the
engine pulley (11).
14. Slip the auger drive belt (4) under the idler
pulley (3).
15. Adjust the auger drive belt (4). See "How To
Adjust The Auger Drive Belt" in the
Maintenance section.
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16. Adjust the auger belt guide (9). See "How
To Adjust The Belt Guide" in the
Maintenance section.
17. (Figure 21) Install the belt cover (1). Tighten
screw (2).
18. (Figure 25) Install the bottom panel (2).
19. Install the bolts (1) on each side of the
bottom panel (2).
20. Tighten the bolts (1) and bolts (3) on each
side of the bottom panel (2).
21. Check the adjustment of the cables. See
"How To Check And Adjust The Cables" in
the Maintenance section.
22. Connect the spark plug wire.
How To Remove the Traction Drive Belt
If the snow thrower will not move forward, check
the traction drive belt for wear or damage. If the
traction drive belt is worn or damaged, replace
the belt as follows.
1. Disconnect the spark plug wire.
2. Remove the auger drive belt. See "How To
Remove The Auger Drive Belt" in the
Maintenance section.
3. (Figure 22) Loosen the traction drive belt
guide(s) (15). Pull the traction drive belt
guide(s) (15) away from the traction drive
belt (13).
4. Loosen the nut on the traction drive idler
pulley (12). Move the pulley (12) the
maximum distance away from the traction
drive belt (13) and then tighten the nut on
the pulley (12).
5. Remove the old traction drive belt (13) from
the smaller stack pulley (10). Then, remove
the stack pulley (10) and old traction drive
belt (13). Replace the traction drive belt
(13) with an original factory replacement belt
available from an authorized service center.
6. Install the new traction drive belt (13) onto
the traction drive pulley (14) and onto the
engine shaft.
7. Install the stack pulley (10) onto the engine
shaft. Then, mount the traction drive belt
(13) onto the smaller stack pulley (10).
Tighten the stack pulley (10) securely to the
engine shaft.
8. Adjust the traction drive belt guide(s) (9).
See "How To Adjust The Belt Guide" in the
Maintenance section.
9. Install and adjust the auger drive belt (4).
See "How To Remove The Auger Drive Belt"
in the Service And Adjustment section.
10. Adjust the auger belt guide (9). See "Auger
Belt Guide Adjustment" in the Service And
Adjustment section.
11. (Figure 25) Install the bottom panel (2).
12. Tighten the bolts (3) on each side of the
bottom panel (2).
13. (Figure 21) Install the belt cover (1). Tighten
screw (2).
14. Check the adjustment of the cables. See
"How To Check And Adjust The Cables" in
the Maintenance section.
15. Connect the spark plug wire.
NOTE: After approximately ten hours of
operation, a new belt will stretch and require
an adjustment of the belt tension. See "How
To Adjust The Traction Drive Belt" in the
Service And Adjustment section.
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