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Page Title:
CAB LEVELING AIR SPRINGS DO NOT OPERATE (CONT) |
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 TM 9-2320-366-20-3
u3. CAB LEVELING AIR SPRINGS DO NOT OPERATE (CONT)
KNOWN INFO
TEST OPTIONS
2.
Visual Inspection
CTIS operates.
REASON FOR QUESTION
Air hoses free from kinks and
Do cab air springs
leaks.
This question eliminates
inflate?
Air hose 522 OK.
possible problems and
Air hose 506 OK.
determines where
Air/hydraulic manifold OK.
troubleshooting continues.
Pressure protection valve OK.
Air hose 501 OK.
POSSIBLE PROBLEMS
NO
Faulty variable control check
valve.
Faulty air hose 503.
Faulty cab leveling valve tee
fitting.
Faulty cab leveling valve.
Go to step 13
YES
Faulty air spring cylinder(s).
of this fault.
Faulty air hose(s) 504 and/or
505.
KNOWN INFO
TEST OPTIONS
3.
Visual Inspection
CTIS operates.
REASON FOR QUESTION
Air hoses free from kinks and
Is air present at variable
leaks.
control check valve input
If air is present, variable
Air hose 522 OK.
port?
control check valve is faulty.
Air hose 506 OK.
Air/hydraulic manifold OK.
Pressure protection valve OK.
Air hose 501 OK.
Cab leveling valve OK.
NO
Air spring cylinders OK.
Air hoses 504 and 505 OK.
POSSIBLE PROBLEMS
Faulty variable control check
Go to step 4
valve.
YES
of this fault.
Faulty air hose 503.
Faulty cab leveling valve tee
fitting.
Replace variable control
check valve (para 16-9).
Change 1
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