5-2 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 4-4, 4-7, 4-9, 4-10, 4-11 .
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 object(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.
SHOULDER TREAD WEAR - ONE
SHOULDER
Axle damage:
straighten or replace axle.
OVERALL TREAD WEAR
Overloading:
check tire load rating.
High speeds:
adjust speed according to road and load condi-
tions.
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
Undercarriage 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 condi-
tions.
High speed cornering:
adjust cornering practices.
Over loading:
check rim load rating.
*IN ALL INSTANCES OF RIM FAILURE, REPLACE THE RIM IMMEDIATELY!
BENDING OR WARPING
Curb-hopping or potholes:
adjust turning practices and ad-
just speed accordingly with road conditions.
Improper tightening sequence:
follow proper tightening se-
quence. (
See Figure 4-19.)
5-2
Summary of Contents for 345B
Page 3: ...MODEL 345B TRAILER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO ...
Page 8: ......
Page 12: ......
Page 22: ...3 10 Figure 3 4 Steps for Loading and Unloading ...
Page 26: ...3 14 Figure 3 7 Rear Impact Guard and Antilock Brake System ...
Page 30: ......
Page 35: ...4 5 Figure 4 2 345B Wiring Diagram ...
Page 36: ...4 6 Figure 4 3 Remote Wiring Diagram ...
Page 41: ...4 11 Figure 4 5 Examples of Camber Figure 4 6 Checking Axle for Bend ...
Page 46: ...4 16 Figure 4 10 Axle and Brake Assembly ...
Page 50: ...4 20 Figure 4 13 Outboard Mount Hub and Drum Figure 4 14 Inboard Mount Hub and Drum ...
Page 54: ...4 24 Figure 4 18 Mounting Tires and Wheels Figure 4 19 Stud Tightening Sequence ...
Page 65: ...5 9 NOTES ...