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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-45SSIU2 — OPERATION AND PARTS MANUAL (STD) — REV. #7 (06/13/07) — PAGE 49
DCA-45SSIU2 — TRAILER MAINTENANCE
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.
Suspension
The leaf suspension springs and associated components
(Figure 66) 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 66. Major Suspension Components
T
b a
e l
1
. 7
u S
p s
n e
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
SNUG FIT ONLY
SPRING EYE BOLT
LOCKING NUTS OR COTTER PINS ARE PROVIDED
TO RETAIN NUT
SHOULDER TYPE
SHACKLE BOLT
i s
n o
o T
q r
e u
e R
u q
e r i
m
n e
s t
o T
q r
e u
F (
- . t
b L
) . s
I M
- N
0 3
M
A
- X
5 3
I M
- N
5 4
M
A
- X
0 6
I M
- N
5 4
M
A
- X
0 6
.
PARTS MUST ROTATE FREELY
-
.
BOLT ASSEMBLY
I M
- N
0 3
M
A
- X
0 5
.
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