Grammer MSG 90.6PG - Page 65

Repair Manual MSG 90.6PG Commercial Vehicles, Omnibuses – November 2017
Material no. 1153450_c
2.4 Fault diagnosis
Page 4 of 16
TABLE OF CONTENTS
Step
no.
Inspect/operate Result/specified status Troubleshooting
1.6 Briefly press the upper actuating cam for the air
intake valve against the valve tappet of the air
intake with your hand.
The seat moves up.
The seat does not move up.
Proceed with inspection
step no. 1.7.
Replace the level control
(Chapter 3.38).
1.7 Briefly press the lower actuating cam for the air
exhaust valve against the valve tappet of the air
exhaust with your hand.
The seat moves down.
The seat does not move down.
End of inspection.
Replace the level control
(Chapter 3.38).