PREVOST LE MIRAGE XLII BUS SHELLS User Manual

Page No.5
NDS2 issue A
Spicer SpecialityAxle Division - Technical Publications
© Spicer Speciality Axle Division
SECTION 2 ROUTINE MAINTENANCE Cont.
2.4 Check permissible slackness in swivel (king) pins every 30000 miles (48000 km) as follows :-
Aspects to be considered are :-
a) Lateral slackness.
b) Vertical slackness.
Before commencing checks, apply parking brake, raise wheels off ground and support axle on stands.
a) Checking lateral slackness
Whilst this is being carried out the brake must be applied.
Place a set -square with its stock on ground and its blade against tyre wall.
Place a mark on ground to indicate position of stock end.
Insert a lever through bottom cut-out of wheel and lever it upwards thus moving set-square outboard.
Mark changed position of stock end.
Maximum allowable stock displacement is given as follows:-
for 17.5" wheels = 6mm.
for 19.5" wheels = 7mm.
for 22.5" wheels = 8mm.
for 24.0" wheels = 9mm.
If displacement exceeds stated allowance then need for bush / bearing attention and possible renewal,
is in evidence.
b) Checking vertical slackness
This is measured by a dial indicator anchored to axle beam and having its pointer placed vertical
against swivel top.
Place a jack against underside of swivel and, whilst applying a lifting force, observe any movement on
indicator dial.
If vertical movement is evident and it exceeds 0.040" (1.02mm) then re-adjustment of swivel is required
by adjusting thickness of bearing adjusting washers.
2.5 Every 6 months, check for movement in ball joints as follows :-
NOTE :-
THIS TEST IS TO BE CARRIED OUT WITH VEHICLE IN LOADED CONDITION,
DO NOT JACK UP VEHICLE
a) Axial end float (axial travel)
End float in direction of axis of ball pin, as shown in fig. no.3 should be within limits of
0.4mm to 2.0mm max. using a test force of 850N.
b) Radial end float (radial travel)
Radial end float at right angles to axis of ball pin as shown in fig. no. 4 should be within
limits of 0.4mm to 0.8mm max. using a test force of 6000N.
Replace ball joints if outside limits given in a) and / or b).
Axial end float
Fig. No. 4
Fig. No. 3
TP803
Radial end float
Radial end float
B

PREVOST LE MIRAGE XLII BUS SHELLS Specifications

General

Brand	PREVOST
Model	LE MIRAGE XLII BUS SHELLS
Category	Buses
Language	English