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WM63-SERIES MIXER • OPERATION AND PARTS MANUAL — REV. #0 (069/27/12) — PAGE 31
MAINTENANCE (MIXER)
Lug Nut Torque Requirements
It is extremely important to apply and maintain proper
wheel mounting torque. Be sure to use only the fasteners
matched to the cone angle of the wheel. Proper procedure
for attachment of the wheels is as follows:
1. Start all wheel lug nuts by hand.
2. Torque all lug nuts in sequence. See Figure 37. DO NOT
torque the wheel lug nuts all the way down. Tighten each
lug nut in 3 separate passes as defined by Figure 37.
Table 9. Tire Wear Troubleshooting
Wear Pattern Cause Solution
Center
Wear
Over Infl ation
Adjust pressure to
particular load per
tire manufacturer
Edge
Wear
Under
Infl ation
Adjust pressure to
particular load per
tire manufacturer.
Side
Wear
Loss of
chamber or
overloading
Make sure load does
not exceed axle
rating. Align wheels.
Toe
Wear
Incorrect
toe-in
Align wheels.
Cupping
Out of
balance
Check bearing
adjustment and
balance tires.
Flat
Spots
Wheel lockup
and tire
skidding
Avoid sudden stops
when possible and
adjust brakes.
Table 10. Tire Torque Requirements
Wheel Size
First Pass
FT-LBS
Second Pass
FT-LBS
Third Pass
FT-LBS
12" 20-25 35-40 50-65
13" 20-25 35-40 50-65
14" 20-25 50-60 90-120
15" 20-25 50-60 90-120
16" 20-25 50-60 90-120
NOTICE
NEVER use an pneumatic air gun to tighten wheel
lug nuts.
3. After first road use, retorque all lug nuts in sequence.
Check all wheel lug nuts periodically.
Figure 37. Wheel Lug Nuts Tightening
Sequence
1
3
2
4
4-LUG NUTS
1
3
2
5
4
5-LUG NUTS
1
3
5
2
4
6
6-LUG NUTS
2
4
1
8
8-LUG NUTS
3
7
5
6
LUG NUTS
TORQUE WRENCH
PNEUMATIC
AIR GUN