KNOWN INFO
TEST OPTIONS
Visual inspection
REASON FOR QUESTION
i3. PARKING BRAKE DOES NOT RELEASE (CONT)
Is air present at supply port
of two-way check valve?
Two-way check valve cannot
be tested if no air is present
at supply port.
Air tanks pressurized.
Air hose 107 OK.
Park control two-way check
valve OK.
Air hose 103 OK.
POSSIBLE PROBLEMS
Faulty air hose 109.
Faulty two-way check valve.
Faulty air hose 119.
Faulty inversion valve.
Faulty air hose 221.
Faulty anti-compounding
valve.
Faulty air hose 231.
5.
TM 9-2320-365-20-2
2-1652 Change 1
NO
YES
Replace air hose 109
(para 11-19).