Murray 6331770X54 Manuel De L'utilisateur page 14

5. If an adjustment is necessary, loosen the
mounting bolt for the belt guide (2). Move
the belt guide (2) to the correct position
(4). Tighten the mounting bolt for the belt
guide (2).
6. (Figure 18) Install the belt cover (1). Tighten
screw (2).
7. Connect the spark plug wire.
How To Adjust Or Replace The Friction
Wheel
How To Check The Friction Wheel
If the snow thrower will not move forward, check
the traction drive belt, the traction drive cable or
the friction wheel. If the friction wheel is worn or
damaged, it must be replaced. See "How To
Replace the Friction Wheel" in this section. If the
friction wheel is not worn or damaged, check as
follows.
1. (Figure 1) Remove the gas from the gas
tank. Stand the snow thrower up on the front
end of the auger housing (4).
WARNING: Drain the gasoline
outdoors, away from fire or flame.
2. Disconnect the spark plug wire.
3. (Figure 22) Remove the bolts (1) on each
side of the bottom panel (2).
4. Loosen the bolts (3) on each side of the
bottom panel (2).
5. Remove the bottom panel (2).
6. (Figure 1) Position the shift speed lever (6)
in the lowest forward speed.
7. (Figure 24) Note the position of the friction
wheel (4). The correct distance "A" from the
right side of the friction wheel (4) to the
outside of the motorbox is as follows:
Tire Size Distance "A"
12 and 13 inch 4-1/8" (10.5 cm)
16 inch 4-5/16" (10.95 cm)
If the friction wheel (4) is not in the correct
position, adjust as follows.
How To Adjust The Friction Wheel
1. (Figure 1) Position the shift speed lever (6)
in the lowest forward speed.
2. (Figure 9) Loosen hex jam nut (9) on speed
select rod (2). Remove ball joint (6) from
shifter rod (7).
3. (Figure 24) Move the friction wheel (4) to
the correct position.
4. (Figure 9) Turn the adaptor (10) until the
ball joint (6) is aligned with the mounting
hole in the shifter rod (7). When aligned,
attach the ball joint (6) to the shifter rod (7).
5. (Figure 22) Install the bottom panel (2).
6. Install the bolts (1) on each side of the
bottom panel (2).
7. Tighten the bolts (1) and bolts (3) on each
side of the bottom panel (2).
How To Replace The Friction Wheel
If the friction wheel is worn or damaged, the
snow thrower will not move forward. The friction
wheel must be replaced as follows.
WARNING: Do not lubricate the
disc drive plate or the friction
wheel.
1740880
1. (Figure 1) Remove the gas from the gas
tank. Stand the snow thrower up on the front
end of the auger housing (4).
WARNING: Drain the gasoline
outdoors, away from fire or flame.
2. Disconnect the spark plug wire.
3. (Figure 28) Remove the bolts (1) on each
side of the bottom panel (2).
4. Loosen the bolts (3) on each side of the
bottom panel (2).
5. Remove the bottom panel (2).
6. (Figure 29) Remove the rear support brace
(18).
7. (Figure 30) Use a 3/16" allen wrench and
remove the fastener that secures the right
axle clamp (30) to the axle (34).
8. Remove the right wheel (35), axle (34), axle
clamp (30), and washer (31).
9. (Figure 28) Remove the left wheel (10) from
the axle (11).
10. (Figure 31) Remove the fasterners that
secure the axle suport (32) to the motorbox.
Remove the axle suport (32) and bushing
(33).
11. Loosen (do not remove) the bolts that secure
the axle bearings (19) to the motor box.
12. Remove the clutch/drive sprocket
assembly (20) from the axle (11).
13. (Figure 32) Remove the four bolts (16) that
hold the bearings (7) on each side of the
hex shaft (8).
14. (Figure 33) Remove the hex shaft (8) and
bearings (7).
NOTE: Take special note of the position of
the washers (13).
15. (Figure 26) Remove the three fasteners (4)
that hold the friction wheel (5) to the hub
(6).
16. (Figure 26) Remove the friction wheel (5)
from the hub (6). Slip the friction wheel (5)
off the hex shaft (8).
17. Assemble the new friction wheel (5) onto
hub (6) with the fasteners removed earlier.
18. (Figure 33) Install the hex shaft (8) and
bearings (7) with the four bolts removed
earlier.
Make sure the washers (17) are properly
installed in the original position. Also,
make sure the two washers (13) are
properly aligned with the actuator arms
(14).
19. Make sure the hex shaft (8) turns freely.
20. To install the remaining parts, reverse the
above steps.
21. Check the adjustment of the friction wheel.
See "How To Adjust The Friction Wheel" in
this section.
22. Make sure the friction wheel and the disc
drive plate are free from grease or oil.
23. (Figure 28) Install the bottom panel (2).
24. Install the bolts (1) on each side of the
bottom panel (2).
25. Tighten the bolts (1) and bolts (3) on each
side of the bottom panel (2).
26. Connect the spark plug wire.
14
How To Replace the Auger Shear Bolt
The augers are secured to the auger shaft with
special shear bolts. These shear bolts are
designed to break and protect the machine if an
object becomes lodged in the auger housing. Do
not use a harder bolt as the protection provided
by the shear bolt will be lost.
WARNING: For safety and to
protect the machine, use only
original equipment shear bolts.
To replace a broken shear bolt, proceed as
follows. Extra shear bolts were provided in the
assembly parts bag.
1. (Figure 1) Move the throttle control (13) to
the stop position. Disengage all controls.
2. Disconnect the spark plug wire. Make sure
all moving parts have stopped.
3. (Figure 14) Lubricate the auger shaft Zerk
fitting (1), if equipped, with a grease gun.
4. (Figure 25) Align the hole in the auger with
the hole in the auger shaft. Install the new
shear bolt (2), spacer (3), and locknut (4).
NOTE: If the model has a 33" (84 cm)
Auger Housing, the spacer (3) is not
required.
5. Connect the spark plug wire.
How To Prepare The Snow Thrower For
Storage
WARNING: Do not remove gasoline
while inside a building, near a fire,
or while you smoke. Gasoline
fumes can cause an explosion or a fire.
If the snow thrower is to be stored for an
extended period, refer to the engine
manufacturer's operating manual (included with
some models) for important maintenance or
storage details.
1. Drain the fuel tank.
2. Let the engine run until it is out of gasoline.
3. Never store the snow thrower with fuel in the
tank inside a building where ignition sources
are present such as hot water and space
heaters, clothes dryers, and the like. Allow the
engine (motor) to cool before storing in any
enclosure.
4. Drain the oil from the warm engine. Fill the
engine crankcase with new oil.
5. Remove the spark plug from the cylinder.
Pour one ounce (29.6 ml) of oil into the
cylinder. Slowly pull the recoil−start grip so
that the oil will protect the cylinder. Install a
new spark plug in the cylinder.
6. Thoroughly clean the snow thrower.
7. Lubricate all lubrication points. See the
Maintenance section.
8. Be sure that all nuts, bolts and screws are
securely fastened. Inspect all visible moving
parts for damage, breakage and wear.
Replace if necessary.
9. Cover the bare metal parts of the blower
housing, auger, and the impeller with spray
rust preventative lubricant.
10. Put the unit in a building that has good
ventilation.
11. If the machine must be stored outdoors,
block up the snow thrower to be sure the
entire machine is off the ground.
12. Cover the snow thrower with a suitable
protective cover that does not retain
moisture. Do not use plastic.
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