DAF LF45, LF55 Series. Manual — part 518
7
LF45/55 series
General
FRONT AXLE, F36/F48
1-1
1. GENERAL
1.1 OVERVIEW DRAWING OF WHEEL HUB
1.
Axle journal
2.
Oil seal
3.
Bearing cage
4.
Bearing race
5.
Hub
6.
Bearing race
7.
Bearing cage
8.
Circlip
9.
Split pin
10. Hub nut
11.
Hub cap
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2
3
4
5
6
7
8
9
10
11
S7 00 573
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FRONT AXLE, F36/F48
General
LF45/55 series
1-2
1.2 OVERVIEW DRAWING OF SWIVEL AXLE
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
S7 00 569
1.
Swivel axle
2.
Top cover
3.
O-ring
4.
Bearing bush
5.
Steering rod arm
6.
Oil seal
7.
Oil seal
8.
Bearing bush (F36 axle) or needle bearing
(F48 axle)
9.
O-ring
10. Bottom cover/track rod arm
11.
Attachment bolt
12. Thrust bearing
13. Adjusting ring
14. Axle end
15. King pin
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7
LF45/55 series
General
FRONT AXLE, F36/F48
1-3
1.3 DESCRIPTION OF THE WHEEL SETTINGS
Z
S7 00 606
Caster
The caster (Z) is the angle of the axle housing
relative to the road surface. The caster is
important for the directional stability of the
vehicle. Too little caster will lead to the vehicle
“searching”, while too much caster will result in
“heavy” steering.
If the caster is set incorrectly this will not cause
tyre wear.
The caster is determined by the relationship
between the road surface and the chassis,
assuming that the chassis is parallel to the road
surface.
The caster can be checked and adjusted very
easily and this does not require any complicated
equipment.
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FRONT AXLE, F36/F48
General
LF45/55 series
1-4
Camber angle and king-pin inclination
The camber angle (X) and the king-pin
inclination (Y) are determined by the design of
the swivel axle and the axle housing. Neither
setting can be adjusted.
Incorrect wheel alignment is caused exclusively
by collisions and/or a bent front axle due to
overloading.
If one of the wheels is out of alignment on a
vehicle, the load of the tyre will be unevenly
distributed across the road surface. This will
result in irregular tyre wear.
Each wheel must be checked separately.
S7 00 129
Toe
Toe is the difference between distances A
and B.
If distance A is smaller than B, this is called
toe-in. If, however, distance A exceeds distance
B, this is called toe-out.
Whether a vehicle should have toe-in or toe-out
is determined by the manufacturer of the
vehicle.
Toe-in or toe-out is required to ensure that the
wheels have perfect rolling characteristics when
the vehicle is driving straight ahead.
If the toe-in or toe-out is incorrect will cause
“chafing” of the tyres on the road surface. This
will result in irregular tyre wear.
The same irregular tyre wear is found in
vehicles with multiple steerable axles if the
wheels are “misaligned” while the vehicle is
driving straight ahead.
S7 00 833
A
B
S7 00 126
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