5-3 TIRES - WHEELS - SUSPENSION
Most tire, wheel, and suspension related problems are due to excessive loads, extreme conditions, and
improper maintenance. Tire, wheel, and suspension problems can be easily detected and solved by
checking the following guide. For maintenance procedures,
see Sections 4-7, 4-8, and 4-12.
SYMPTOM
PROBLEM: REMEDY
VIBRATIONS WHILE DRIVING
Improper tire inflation:
Inflate to proper pressure.
Tires cupped or have flat spots:
Replace tires.
Wheels bent or loose:
Replace or tighten.
Tires incorrectly mounted:
Remount.
Mud in wheels:
Clean wheels.
Tire(s) out of balance:
Balance tires.
Brakes dragging:
Locate cause and repair.
Object(s) stuck between duals:
Remove ob-
ject(s).
RAPID TIRE WEAR/DETERIORATION:
CENTER TREAD WEAR
Over inflation:
Deflate to correct inflation.
SHOULDER TREAD WEAR - BOTH SHOULDERS
Under inflation:
Increase inflation to correct psi.
Check axle alignment.
Overload:
Do not load above rated tire capacity.
SHOULDER TREAD WEAR - ONE SHOULDER
Axle damage:
Straighten or replace axle.
Axles not parallel:
Check axle alignment.
OVERALL TREAD WEAR
Overloading:
Check tire load rating.
High speeds:
Adjust speed according to road and
load conditions.
Incorrect dual matching:
Properly match dual
tires.
TIRE FLAT SPOTS
Quick stops:
Adjust braking practices.
Grabbing brakes:
Adjust brakes properly.
Worn or loose wheel bearings:
Adjust or replace
as needed.
Out of balance wheels and tire:
Balance wheels
and tires.
UNEVEN WEAR
Suspension bushings worn:
Replace bushings.
Worn or loose wheel bearings:
Adjust or replace
as needed.
Out of balance wheels and tires:
Balance
wheels and tires.
RIM FAILURE*:
CRACKING
Overinflated tires:
Deflate tire to proper psi.
High speeds:
Adjust speed according to road and
load conditions.
High speed cornering:
Adjust cornering practices.
Over loading:
Check rim load rating.
*In all instances of rim failure, replace the rim immediately!
5-4
Summary of Contents for 336C
Page 3: ...MODEL 336C CAR CARRIER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO...
Page 8: ......
Page 24: ...3 12 Figure 3 7 Lining Up the Over the Cab Deck Figure 3 8 Loading the Over the Cab Deck...
Page 28: ...3 16 Figure 3 11 Loading the Lower Deck...
Page 32: ...3 20 Figure 3 13 Rear Impact Guard and Antilock Brake System...
Page 40: ...4 6 Figure 4 3 336C Wiring Diagram...
Page 45: ...4 11 Figure 4 7 Checking Axle for Bend Figure 4 8 Examples of Camber...
Page 50: ...4 16 Figure 4 12 Axle and Brake Assembly...
Page 54: ...4 20 Figure 4 14 Outboard Mount Hub and Drum Figure 4 15 Inboard Mount Hub and Drum...
Page 59: ...4 25 Figure 4 19 Mounting Tires and Wheels Figure 4 20 Stud Tightening Sequence...
Page 70: ...NOTES 5 10...
