TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
2. BAP FRONT PIN LOCK WILL NOT OPERATE (continued).
TEST OPTIONS
KNOWN INFO
4.
Audible inspection.
HEMTT air supply fully
Is there steady and
charged.
strong air pressure at
REASON FOR QUESTION
BAP air supply hose
inlet to curb-side and
connected to HEMTT air
road-side air
Air cylinders will not
supply coupling.
cylinders?
operate without
BAP control valve
sufficient air pressure.
activated.
HEMTT air supply
pressure OK.
Air line between BAP air
Replace curb-side
supply hose and control
and/or road-side air
valve OK.
lines between control
NO
Control valve OK.
valve and air cylinders
(para 4-45). Verify
repair; go to Step 7 of
POSSIBLE PROBLEMS
this fault.
Curb-side and/or road-
side air lines between
YES
control valve and air
cylinders faulty.
Curb-side and/or road-
side air cylinder
breather(s) faulty.
Curb-side and/or road-
side air cylinder(s)
faulty.
4-38
