MC94SK/PK CONCRETE MIXER • OPERATION MANUAL — REV. #0 (06/22/22) — PAGE 29
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 8 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
WARNING
ALWAYS
wear safety glasses when removing
or installing force fitted parts. Failure to
comply may result in serious injury.
Table 8. 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.
MAINTENANCE (MIXER)
SUSPENSION
The spring suspension and associated components (Figure 37)
should be visually inspected every 6,000 miles for signs
of excessive wear, elongation of bolt holes and loosening
of mounting bracket. Replace any damaged suspension
component immediately.
Figure 37. Suspension Components
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
torque the wheel lug nuts all the way down. Tighten
(torque) each lug nut in three separate passes as defined
NOTICE
NEVER
use an pneumatic air gun to tighten wheel
lug nuts.
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