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4. If gear teeth are not contacting properly (Figure 37),
adjust pillow block to correct the problem.
HEAL
CONTACT
PROPER
CONTACT
TOE
CONTACT
Figure 37. Gear Teeth Alignment
TIRES/WHEELS/LUG NUTS
Tires and wheels are a very important and critical
components of the trailer. When specifying or replacing the
trailer wheels it is important the wheels, tires, and axle are
properly matched.
WARNING
DO NOT attempt to repair or modify a wheel.
DO NOT install an inter-tube to correct a leak
through the rim. If the rim is cracked, the air
pressure in the inter-tube may cause pieces
of the rim to explode (break-off) with great force and can
cause serious eye or bodily injury.
Tires Wear/Inflation
Tire inflation pressure is the most important factor in tire
life. Pressure should be checked cold before operation. DO
NOT bleed air from tires when they are hot. Check inflation
pressure weekly during use to insure the maximum tire life
and tread wear.
WARNING
ALWAYS wear safety glasses when removing
or installing force fitted parts. Failure to
comply may result in serious injury.
PAGE 28 — WM63SLF-MIXER • OPERATION MANUAL — REV. #0 (09/27/22)
Table 7 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
FACE
CONTACT
FLANK
CONTACT
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 38. DO NOT
MAINTENANCE (MIXER)
Table 7. Tire Wear Troubleshooting
Wear Pattern
Center
Over Infl ation
Wear
Edge
Under
Wear
Infl ation
Loss of
Side
chamber or
Wear
overloading
Toe
Incorrect
Wear
toe-in
Out of
Cupping
balance
Wheel lockup
Flat
and tire
Spots
skidding
torque the wheel lug nuts all the way down. Tighten each
lug nut in 3 separate passes as defined by Figure 38.
Table 8. Tire Torque Requirements
First Pass
Wheel Size
FT-LBS
12"
20-25
13"
20-25
14"
20-25
15"
20-25
16"
20-25
Cause
Solution
Adjust pressure to
particular load per
tire manufacturer
Adjust pressure to
particular load per
tire manufacturer.
Make sure load does
not exceed axle
rating. Align wheels.
Align wheels.
Check bearing
adjustment and
balance tires.
Avoid sudden stops
when possible and
adjust brakes.
Second Pass
Third Pass
FT-LBS
FT-LBS
35-40
50-65
35-40
50-65
50-60
90-120
50-60
90-120
50-60
90-120
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