Front Wheel Alignment Specifications; Troubleshooting - PREVOST H3-41 Maintenance Manual

SECTION 14: STEERING

16.5 FRONT WHEEL ALIGNMENT SPECIFICATIONS

Use static wheel alignment systems which work with angle measurements only, such as Josam or Hunter
systems. Static alignment specifications are listed in the following tables:
Front Wheel Alignment
Camber
R.H. and L.H. * (degrees)
Caster
R.H. and L.H. (degrees)
Total toe
(A minus B) (degrees)

17. TROUBLESHOOTING

CONDITION
Tires wear out
quickly or have
uneven tire tread
wear.
Vehicle is hard to
steer.
Bent or broken
steering arm,
steering top lever or
tie rod assembly.
40 PA1621 Maintenance Manual All Series | Section revised June 2019
FRONT WHEEL ALIGNMENT
SPECIFICATIONS WITH I-BEAM AXLE
CAUSE
1. Tires have incorrect air pressure.
2. Tires out-of-balance.
3. Incorrect tag axle alignment.
4. Incorrect toe-in setting.
5. Incorrect steering arm geometry.
1. Low pressure in the power steering
system.
2. Steering gear not
correctly.
3. Steering linkage needs lubrication.
4. King pins binding.
5. Incorrect steering arm geometry.
6. Caster improperly adjusted.
7. Tie rod ends hard to move.
8. Worn thrust bearing.
1. Too much pressure in the power
steering system.
2. Cut-off pressure of
steering system improperly adjusted.
3. Vehicle not powered on correctly.
4. Power steering system not installed
correctly.
Minimal Nominal
-0.250 0.125
2
0.04
1. Put specified air pressure in tires.
2. Balance or replace tires.
3. Align tag axle.
4. Adjust toe-in specified setting.
5. Service steering system as necessary.
1. Repair power steering system.
assembled 2. Assemble steering gear correctly.
3. Lubricate steering linkage.
4. Replace king pins.
5. Service steering system as necessary.
6. Adjust caster as necessary.
7. Replace tie rod ends.
8. Replace thrust bearing.
1. Replace damaged part(s), adjust power
steering system to specified pressure.
the power 2. Make sure vehicle is powered on
correctly.
3. Correctly install the power steering
system.
4. Correctly install the power steering
system.
Maximal
0.375
2.75
0.06 0.08
CORRECTION
3.5