TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
2. BAP FRONT PIN LOCK WILL NOT OPERATE (continued).
6.
TEST OPTIONS
KNOWN INFO
Manually extend and
HEMTT air supply fully
Do curb-side and
contract curb-side and
charged.
road-side air cylinders
road-side air cylinders
BAP air supply hose
manually extend and
with breather installed.
connected to HEMTT air
contract with breather
supply coupling.
installed?
REASON FOR QUESTION
BAP control valve
activated.
Front pin locks will not
HEMTT air supply
release if air cylinders
pressure OK.
are binding or frozen.
Air line between BAP air
supply hose and control
valve OK.
Replace curb-side
Control valve OK.
and/or road-side air
Air lines between control
NO
cylinder (para 4-35).
valve and air cylinders
Verify repair; go to
OK.
Step 7 of this fault.
POSSIBLE PROBLEMS
YES
Curb-side and/or road-
side air cylinder
breather(s) faulty.
Curb-side and road-
Curb-side and/or road-
side air cylinders are
side air cylinder(s) faulty.
good. Verify repair;
go to Step 7 of this
fault.
4-42
