TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
2. BAP FRONT PIN LOCK WILL NOT OPERATE (continued).
FRONT
PIN LOCK
AUDIBLE INSPECTION
(1) Remove two screws and
lockwashers and air cylinder
LOCKWASHER
guard from curb-side and
SCREW
road-side front pin locks.
Discard lockwashers.
(2) Loosen hose clamp and
remove air hose and adapter
from each curb-side and
road-side air cylinders.
Check for air pressure at
AIRCYLINDER
ends of air hoses.
GUARD
(a) Activate control valve by
AIR CYLINDER
pulling lever forward.
(b) Very little or no air
pressure indicates hose
between control valve
and air cylinder is
damaged. Replace hose
(c) Steady air pressure
indicates hose is good.
Go to Step (3).
(3) Install air hose and adapter
on curb-side and road-side
air cylinders with hose
clamp.
AIR
LEVER
CYLINDER
ADAPTER
HOSE
CLAMP
AIR
HOSE
4-39
