Repair Manual MSG 90.6PG Commercial Vehicles, Omnibuses – November 2017
Material no. 1153450_c
2.4
Fault diagnosis
Page 8 of 16
TABLE OF CONTENTS
3 Checking the air spring
Preconditions for fault diagnosis:
•
Compressed-air reservoir pressure at least 7 bar.
•
Seat cushion is lifted off in position for repair (Chapter 3.1).
•
Bellows at the lower suspension part is removed (see Chapter 3.6).
•
The compressed-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.
•
Level control has been inspected and found to be OK.
Note:
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
3.1
WARNING
Risk of crushing!
During inspection, do not touch the seat
suspension and the swinging structure with
your hands.
Move the seat to the highest position.
Check the air spring for abrasion.
Visible abrasion, air spring untight.
No abrasion.
Replace the air spring
(Chapter 3.36).
Proceed with inspection step
no. 3.2.
3.2
Apply load to the seat suspension.
Air escapes at the air spring.
Air spring is tight.
Replace the air spring
(Chapter 3.36).
End of inspection.
