Repair Manual MSG 90.6PG Commercial Vehicles, Omnibuses – November 2017
Material no. 1153450_c
2.3
Overview of faults
Page 1 of 11
TABLE OF CONTENTS
This chapter contains notes on possible seat faults. The notes and information provided in Chapter 2.4 "Fault Diagnosis" are
intended to ease troubleshooting of faults.
Faults caused due to insufficient maintenance or improper repair are not covered here.
Note:
The components mentioned above are illustrated in Chapter 2.1, if not stated otherwise in this text.
Fault description
Possible cause
Troubleshooting
Seat moves up too slowly.
• Too low reserve air pressure.
• Bowden pull wire for seat height
adjustment is not correctly adjusted.
• Level control is defective.
• Air leaks at the valve tappet.
• Air connections are leaky (air leaks at
the connections of the air hoses).
• Air exhaust hose or air intake hose is
bent.
Check the compressed air system of
the vehicle.
Check the Bowden pull wire for seat
height adjustment and adjust it, if
necessary (see Chapter 3.8).
Check leveling valve and level control
(Chapter 2.4, inspection steps 1.1
and 2.1).
Replace the level control (Chapter
3.38).
Check all air connections for air
leakage and replace the component
with a defective air connection with a
new one if necessary.
Replace the air hose set
(see Chapter 3.22).