PREVOST H3-41 Maintenance Manual page 527

Worn or broken
steering ball pin.
Worn king pins and
knuckle bushings.
Vibration or shimmy
of front axle during
operation.
18. TORQUE SPECIFICATIONS
The torque specifications applicable to the front axle steering are grouped with information regarding the
front suspension. Please refer to Section 16: SUSPENSION of this manual.
19. SPECIFICATIONS
Power Steering Gear
Make ............................................................................................... ZF/ROBERT BOSCH-SERVOCOMTRONIC
Type ............................................................................................................................................. Speed Sensitive
F.E.W. ................................................................................................................................... 16,600 lbs (7 545 kg)
Pressure rating ........................................................................................................................ 2,175 psi (150 Bar)
Gear ratio (center) ...................................................................................................................................... 22.2 : 1
Gear ratio (extremities) ............................................................................................................................... 26.2 : 1
Minimum pump flow for 1.5 hwt/sec ........................................................................................ 4.22 gpm (16 lpm)
Power Steering Gear
Make ............................................................................................................ ZF/ROBERT BOSCH--SERVOCOM
F.E.W. ................................................................................................................................... 16,600 lbs (7 545 kg)
Pressure rating ........................................................................................................................ 2,175 psi (150 Bar)
Gear ratio (center) ...................................................................................................................................... 22.2 : 1
Gear ratio (extremities) ............................................................................................................................... 26.2 : 1
Minimum pump flow for 1.5 hwt/sec ........................................................................................ 4.22 gpm (16 lpm)
Power Steering Gear (with IFS)
Make ............................................................................................................ ZF/ROBERT BOSCH -SERVOCOM
Type. ............................................................................................................................................................... 8098
F.E.W. ................................................................................................................................... 19,000 lbs (8 618 kg)
1. Drag link fasteners tightened past
specified torque.
2. Lack of lubrication or incorrect
lubricant.
3. Power steering stops improperly
adjusted.
1. Worn or missing seals and gaskets.
2. Incorrect lubricant.
3. Axle not lubricated at scheduled
frequency.
4. Incorrect lubrication procedures.
5. Lubrication schedule does not match
operating conditions.
1. Caster not adjusted properly.
2. Wheels and/or tires out-of balance.
3. Worn steering stabilizer cylinder.
PA1621 Maintenance Manual All Series | Section revised June 2019
SECTION 14: STEERING
1. Replace damaged part(s), tighten drag
link fasteners to specified torque.
2. Lubricate linkage
lubricant.
3. Adjust stops to specified dimension.
1. Replace damaged part(s), replace seals
and gaskets.
2. Lubricate axle with specified lubricant.
3. Lubricate axle at scheduled frequency.
4. Use correct lubrication schedule to
match operating conditions.
5. Change lubrication schedule to match
operating conditions.
1. Adjust caster.
2. Balance or replace wheels and/or tires.
3. Replace steering stabilizer cylinder.
with specified
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