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TM 9-2320-364-20-4
2-3004
3. INTERAXLE FRONT TO REAR LOCKUP WILL NOT ENGAGE WITH CTIS IN
MUD, SAND AND SNOW.
INITIAL SETUP
1.
Tighten loose fittings,
repair or replace air
lines (Para 12-36 and
schematic Fig 2-73).
Verify repair, go to
Step 10 of this Fault.
START
YES
NO
Dash lights operate indicating
circuit breaker CB8 OK.
Horn operates indicating circuit
breaker CB16 OK.
Air system OK indicating air
input to interaxle lockup
solenoid valve.
Interaxle lockup cylinder hoses
and/or fittings leaking or
crimped.
Interaxle lockup solenoid valve
faulty.
Wire 1435 faulty.
Interaxle lockup solenoid faulty.
Wire 1882 faulty.
Wire 1888 faulty.
Wire 1884 faulty.
CTIS controller faulty.
INTERAXLE relay R20 faulty.
Wire 1889 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
If interaxle lockup cylinder air
lines are loose or disconnected,
cylinders will not operate due to
loss of air pressure.
2-33. AXLES TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (Optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Materials/Parts
Adhesive (Item 9, Appendix C)
Solution, Soap (Item 86, Appendix C)
Are interaxle lockup cylinder
air lines free of damage,
leaks, crimps, and are fittings
free of leaks?
Soap and water solution will be used to visually check for leaks.
WARNING
NOTE
Read WARNING
on Page 2-3005
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