page 44 — DCa180SSI/DCa180SSIu 60 hz gen. • operaTIon anD parTS manual — rev. #1 (08/02/10)
traiLer Maintenance
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
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 14 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
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
CauTIon
alWaYS
wear safety glasses when
removing or installing force fitted parts.
Failure to comply may result in serious
injury.
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
Wear pattern
Cause
Solution
Center Wear Over inflation.
Adjust pressure to particular
load per tire manufacturer.
Edge Wear
Under inflation.
Adjust pressure to particular
load per tire manufacturer.
Side Wear
Loss of camber
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.
as detailed in Table 15.
Figure 63. Major Suspension Components
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:
Table 15. Suspension Torque requirements
Item
Torque (Ft.-lbs.)
3/8" U-Bolt
Min-30 Max-35
7/16" U-Bolt
Min-45 Max-60
1/2" U-Bolt
Min-45 Max-60
Shackle Bolt
Spring Eye Bolt
Snug fit only. Parts must rotate freely.
Locking nuts or cotter pins are
provided to retain nut-bolt assembly.
Shoulder Type
Shackle Bolt
Min-30 Max-50
Summary of Contents for Whisperwatt DCA180SSI
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