Repair Manual MSG 90.6PG Commercial Vehicles, Omnibuses – November 2017
Material no. 1153450_c
2.4
Fault diagnosis
Page 1 of 16
TABLE OF CONTENTS
1 Inspection of the leveling valves
Preconditions for fault diagnosis:
•
Compressed-air reservoir pressure at least 7 bar.
•
Seat cushion is lifted off in position for repair (Chapter 3.1).
•
The air hoses have been inspected with regard to kinks and tightness and found to be OK.
•
The connections of the air hoses have been inspected with regard to tightness and found to be OK.
•
The air spring has been inspected with regard to tightness and found to be OK.
Notes:
•
Perform the inspection whit the seat being loaded (e.g. by pressing it down).
•
The components mentioned above are illustrated in Chapter 2.1, if not stated otherwise in this text.
Step
no.
Inspect/operate
Result/specified status
Troubleshooting
1.1
WARNING
Risk of crushing!
During inspection, do not touch the seat
suspension and the swinging structure with
your hands.
Apply load to the seat.
Air escapes at the valves of the
level control.
The level control is tight.
Replace the level control
(Chapter 3.38).
Proceed with inspection
step no. 1.2.
