MQ Power Whisperwatt DCA180SSI Operation And Parts Manual page 44

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.
Tire Wear/Inflation
CauTIon
Tire inflation pressure is the most important factor in tire
alWaYS wear safety glasses when
life. Pressure should be checked cold before operation Do
removing or installing force fitted parts.
noT bleed air from tires when they are hot!. Check inflation
Failure to comply may result in serious
pressure weekly during use to insure the maximum tire life
injury.
and tread wear.
CauTIon
Do noT attempt to repair or modify a
wheel. Do noT install in inner tube to
correct a leak through the rim. If the rim
is cracked, the air pressure in the inner
tube may cause pieces of the rim to explode (break off)
with great force and cause serious eye or bodily injury.
Table 14 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
Table 14. Tire Wear Troubleshooting
Wear pattern
Center Wear Over inflation.
Edge Wear Under inflation.
Loss of camber
Side Wear
or overloading.
Toe Wear Incorrect toe-in.
Cupping Out-of-balance.
Wheel lockup and
Flat Spots
tire skidding.
Suspension
The leaf suspension springs and associated components
(Figure 63) should be visually inspected every 6,000 miles
for signs of excessive wear, elongation of bolt holes, and
loosening of fasteners. Replace all damaged parts
(suspension) immediately. Torqued suspension components
page 44 — DCa180SSI/DCa180SSIu 60 hz gen. • operaTIon anD parTS manual — rev. #1 (08/02/10)
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.
traiLer Maintenance
as detailed in Table 15.
Figure 63. Major Suspension Components
Table 15. Suspension Torque requirements
Item
3/8" U-Bolt
7/16" U-Bolt
1/2" U-Bolt
Shackle Bolt
Spring Eye Bolt
Shoulder Type
Shackle Bolt
lug nut Torque requirements
It is extremely important to apply and maintain proper wheel
mounting torque on the trailer. 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:
Torque (Ft.-lbs.)
Min-30 Max-35
Min-45 Max-60
Min-45 Max-60
Snug fit only. Parts must rotate freely.
Locking nuts or cotter pins are
provided to retain nut-bolt assembly.
Min-30 Max-50