YES
NO
4.
TEST OPTIONS
Visual Inspection
Is air present at cab leveling
valve tee fitting check valve
output port?
If air is not present, cab
leveling valve tee fitting. If air
is present, air hose 503 is
faulty.
Replace air hose
503 (para 23-3).
KNOWN INFO
Replace cab leveling
valve tee fitting (para 16-8).
CTIS operates.
Air hoses free from kinks and
leaks.
Variable control check valve
OK.
Air hose 522 OK.
Air hose 506 OK.
Air/hydraulic manifold OK.
Pressure protection valve OK.
Air hose 501 OK.
Cab leveling valve OK.
Air spring cylinders OK.
Air hoses 504 and 505 OK.
POSSIBLE PROBLEMS
Faulty air hose 503.
Faulty cab leveling valve tee
fitting.
TM 9-2320-365-20-2
2-1974.2 Change 1
t3. CAB LEVELING AIR SPRINGS DO NOT OPERATE (CONT)
REASON FOR QUESTION