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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.
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.
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 16 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
TABLE 16 TIRE WEAR TROUBLESHOOTING
WEAR PATTERN
CAUSE
Over Inflation.
Center Wear
Under Inflation.
Edge Wear
Loss of camber
Side Wear
or overloading.
Toe Wear
Incorrect toe-in.
Cupping
Out-of-balance.
Wheel lockup &
Flat Spots
tire skidding.
CAUTION:
DCA-45USI — OPERATION AND PARTS MANUAL (STD) — REV. #2 (04/22/05) — PAGE 43
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.
ALWAYS wear safety glasses when removing or
installing force fitted parts. Failure to comply may
result in serious injury.
DCA-45USI — TRAILER MAINTENANCE
Suspension
The leaf suspension springs and associated components
(Figure 57) 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
as detailed in Table 17.
Figure 57. Major Suspension Components
T
b a
e l
1
. 7
u S
e t I
m
3
" 8 /
U
B -
O
T L
7
1 /
" 6
U
B -
O
T L
1
" 2 /
U
B -
O
T L
SHACKLE BOLT
SPRING EYE BOLT
SHOULDER TYPE
SHACKLE BOLT
p s
n e
i s
n o
o T
q r
e u
e R
u q
e r i
o T
q r
e u
F (
- . t
b L
I M
- N
0 3
M
A
- X
I M
- N
5 4
M
A
- X
I M
- N
5 4
M
A
- X
.
SNUG FIT ONLY
PARTS MUST ROTATE FREELY
LOCKING NUTS OR COTTER PINS ARE PROVIDED
-
TO RETAIN NUT
BOLT ASSEMBLY
I M
- N
0 3
M
A
- X
m
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5 3
0 6
0 6
.
.
0 5
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