April 2019
– Issue 4
Page
41
of
48
7A.3 – Steering (continued):
Fault
Possible causes
Trouble shooting
Uneven tyre
wear
Incorrect tyre pressures
Check and reset tyre pressures
Incorrect wheel alignment settings
Re-set wheel alignment
Failed shock absorbers
Check and replace shock absorbers
Bus wanders on
road, driver
continually
making
adjustments to
compensate
Incorrect ride height settings
Set vehicle to correct ride height
Stiff king-pins or tie-rod ends
Check and repair as necessary
Stiff or seized steering shaft
Inspect both shaft universal joints from steering
wheel to steering box
Excess freeplay
in steering
Possible steering box adjustment required
Adjust steering box freeplay
7B – Body:
Fault
Possible causes
Trouble shooting
Entry door not
opening or
closing
No air pressure in system
Start engine and build up air pressure
Incorrect setting of RT146 entrapment – AU
Eastern States
Emergency door valve is in the on position
Turn off the emergency door valve under front
nearside of bus
Door remote control has flat battery
Replace battery
Vehicle isolator switch is on
Turn off vehicle isolator switch
Bus on a slope and door not closing
Adjust spring at top of door pillar shaft
Collar on door ram not set correctly
Micro switch ball jammed
Reed switches not set correctly
RTA 146 Entrapment for UA Eastern States not set
correctly or has failed
Adjust and or replace as necessary
Owner’s Manual
