TM 5-3805-262-20
3-19. AIR BRAKE SYSTEM TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. LOW AIR PRESSURE WARNING BUZZER SOUNDS.
Do not operate loader if low air pressure warning
i f A I R P R E S S g a g e i n d i c a t i o n i s n o t i n g r e e n
could cause death or serious injury and extensive
loss of braking power.
buzzer is sounding and
zone. Failure to do so
property damage due to
Start engine and operate for several minutes to build up air pressure.
At left instrument panel, check AIR PRESS gage indication.
a. If AIR PRESS gage indicates in green zone, replace air pressure
warning switch (page 5-48).
b. If AIR PRESS gage does not indicate in green zone, go to MAL-
FUNCTION 3 below (page 3-121).
2. AIR PRESSURE GAGE INDICATES LOW AIR PRESSURE (LOW AIR PRESSURE BUZZER NOT
SOUNDING).
Step 1.
Remove engine right side panels (page 9-14).
At air reservoir port, disconnect wire lead from pressure sender
t e r m i n a l.
AIR PRESS gage should indicate in green zone.
a. If AIR PRESS gage indicates in green zone, go to step 2 below.
b. If AIR PRESS gage does not indicate in green zone, check for
short circuit to ground in wire lead between gage and pressure
sender.
If wire lead checks okay, remove instrument cluster (page 5-34)
and replace AIR PRESS gage (page 5-39).
3-120
