KNOWN INFO
TEST OPTIONS
YES
NO
12.
Is air present at pressure
protection valve output
port?
Replace air hose
501 (para 23-3).
Replace pressure protection
valve (para 11-29).
If air is not present, pressure
protection valve is faulty. If air
is present, air hose 501 is
faulty.
CTIS operates.
Air hoses free from kinks and
leaks.
Variable control check valve
OK.
Air hose 503 OK.
Air hose 522 OK.
Cab leveling valve tee fitting
OK.
Air hose 506 OK.
Cab leveling valve OK.
Air spring cylinders OK.
Air hoses 504 and 505 OK.
Air/hydraulic manifold OK.
POSSIBLE PROBLEMS
Faulty pressure protection
valve.
Faulty air hose 501.
TM 9-2320-365-20-2
2-1974.18 Change 1
t3. CAB LEVELING AIR SPRINGS DO NOT OPERATE (CONT)
Visual Inspection
REASON FOR QUESTION