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EM120P/S HYDRAULIC MIXER • OPERATION AND PARTS MANUAL — REV. #5 (09/15/11) — PAGE 31
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.
WEAR PATTERN SOLUTION
CAUSE
Center Wear
Over Inflation
Adjust pressure to
particular load per
tire manufacturer.
Edge Wear Under Inflation
Make sure load does
not exceed axle rating.
Align wheels.
Side Wear
Adjust pressure to
particular load per
tire manufacturer.
Loss of chamber
or overloading.
Toe Wear
Incorrect toe-in
Align wheels.
Cupping
Out-of balance
Check bearing adjust-
ment and balance tires.
Flat Spots
Wheel lockup &
tire skidding.
Avoid sudden stops
when possible and
adjust brakes.
TABLE 9.TIRE WEAR TROUBLESHOOTING
MAINTENANCE (MIXER)
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 — Damaged Wheels
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.
WARNING — Eyesight Hazard
ALWAYS
wear safety glasses when
removing or installing force fitted
parts. Failure to comply may result in
serious injury.
NEVER!
use an pneumatic air gun to tighten
wheel lug nuts.
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Table 9 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
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 39. DO NOT
torque the wheel lug nuts all the way down. Tighten each
lug nut in 3 separate passes as defined by Table 10.