TM 5-3805-262-20
3-18. SERVICE BRAKE SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. SERVICE BRAKES DO NOT STOP LOADER (AIR SYSTEM OPERATING OKAY) (Cont).
S t e p 2 . ( C o n t ).
a. If brake pads did not move, replace front brake actuator (page
7 - 5 1 ).
b. If brake pads did move, replace rear brake actuator (page 7-51).
Step 3.
Open air reservoir drain
valve and drain air.
Remove one plug from
brake treadle and valve
upper chamber and in-
stall 1/2 to 1/8 NPT re-
ducer .
Connect zero to 150 psi
pressure gage to reduc-
er. Pressure gage hose
should be long enough so
that you can read
pressure gage in cab.
C l o s e a i r r e s e r v o ir
drain valve.
Start engine and operate
at 1000 rpm until low
air pressure buzzer
stops sounding.
Slowly press brake trea-
dle and valve while
watching pressure gage.
Pressure gage shall in-
d i c a t e i n c r e a s i n g a i r
pressure as brake trea-
dle and valve is
p r e s s e d .
a. If pressure gage does not indicate increasing air pressure, re-
place brake treadle and valve (page 7-53).
b. If pressure gage indicates increasing air pressure, go to step 4
below.
3-118
