MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 27
MAINTENANCE (ENGINE)
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.
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.
Table 7 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
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.
WARNING
ALWAYS
wear safety glasses when removing
or installing force fitted parts. Failure to
comply may result in serious injury.
Table 7. 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.
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