Lubrication; Maintenance; Removal And Replacement; Removal - PREVOST H3-41 Maintenance Manual

SECTION 10: FRONT I-BEAM AXLE
3.

LUBRICATION

MAINTENANCE

Knuckle pins are provided with grease fittings
for pressure lubrication. These grease fittings
should be serviced at the intervals specified
by the Lubrication And Servicing Schedule in
Section 24: LUBRICATION & SERVICING.
Good quality lithium-base
mineral grease NLGI No.1 and 2 like Shell
Retinax LX are recommended.
FIGURE 2: FRONT AXLE GREASING POINTS
4. MAINTENANCE
A periodic inspection of the front axle assembly
should be made to check that no damage and
distortion have taken place. All the bolts and and
stop screws should be checked and tightened,
as required, to the torque specifications given at
the beginning of this section. Also check the
condition of the steering knuckle kingpins and
bushings. In case of excessive looseness, the
bushings and kingpins should be replaced.
Any looseness in the steering linkage, under
normal steering loads, is sufficient cause to
immediately check all pivot points for wear,
regardless of accumulated mileage. Steering
linkage pivot points should be checked each time
the front axle assembly is lubricated. Any
looseness can be visually detected while rotating
the steering wheel in both directions.
8
PA1621 Maintenance Manual All Series
roller bearing
|
Section revised October 2018
Steering knuckles, knuckle pins and bushings can
be overhauled or replaced without removing the
axle from the vehicle. However, if extensive
overhaul work is necessary, the axle assembly
should be removed.
CAUTION
Should removal of a locking device be required
when undergoing repairs, disassembly or
adjustments, always replace with a new one.
5.

REMOVAL AND REPLACEMENT

The following procedure deals with the removal of
the front axle assembly. The method used to
support the axle assembly and suspension
components during removal and disassembly
depends upon local conditions and available
equipment.
5.1

REMOVAL

1. Raise the vehicle by its jacking points on the
body (see Section 18, ''Body''
paragraph ''Vehicle Jacking Points'') until
vehicle body is approximately 20 inches (508
mm) from the floor. Place jack stands under
frame. Remove the wheels (if required, refer
to Section 13, ''Wheels, Hubs and Tires'').
CAUTION
Use only the recommended jacking points as
outlined in section 18 "Body".
2. Exhaust compressed air from the air supply
system by opening the drain valve of each
reservoir.
3. Install jacks under axle jacking points to
support the axle weight.
4. Disconnect the steering drag link from the
steering arm.
5. Remove the ABS sensors from their location
in hubs (if applicable).
6. Disconnect the height control valve link from
its support on the axle.
7. Disconnect air lines
chambers, and cover line ends and fittings to
prevent the entry of foreign matter.
under
from front brake