KNOWN INFO
TEST OPTIONS
Visual Inspection
NO
YES
7.
Is air present at cab leveling
valve input port?
If air is present, cab leveling
valve is faulty.
Go to step 8
of this fault.
Replace cab leveling
valve (para 16-8).
CTIS operates.
Air hoses free from kinks and
leaks.
Variable control check valve
OK.
Air hose 503 OK.
Air spring cylinders OK.
Air hoses 504 and 505 OK.
POSSIBLE PROBLEMS
Faulty air hose 522.
Faulty cab leveling valve tee
fitting.
Faulty air hose 506.
Faulty air/hydraulic manifold.
Faulty pressure protection
valve.
Faulty air hose 501.
Faulty cab leveling valve.
TM 9-2320-365-20-2
2-1974.8 Change 1
t3. CAB LEVELING AIR SPRINGS DO NOT OPERATE (CONT)
REASON FOR QUESTION