TM 5-3805-248-10
TROUBLESHOOTING PROCEDURES
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
AIR SYSTEM AND BRAKES
1.
Brake Air Pressure Low
Alert Indicator and Buzzer
Are On During Operation.
WARNING
When brake air pressure low indicator and buzzer come on, bring machine to a safe stop to prevent injury
to operator and/or severe damage to machine.
1.
Ensure that air tank drain valve(s) are
Close drain valve(s) if required. If problem
closed.
still exists, go to test step 2.
2.
Check for air leaks at air tanks, hoses,
If any leaks are present, or if no leaks are
fittings, and tractor/scraper
found and problem still exists, notify Unit
connections at hitch area.
Maintenance.
WARNING
Park machine on level ground, stop engine, and lower bowl to prevent injury to operator and/or severe
damage to machine.
1.
Check for debris/obstruction at brake
Clean debris/obstruction from brake
2.
Parking/Emergency Brake
actuators. If problem still exists, go to test
actuators.
Will Not Engage.
step 2.
2.
Slowly try to move machine forward
If problem still exists, go to test step 3.
to test if brake is engaged.
3.
Perform parking brake test (WP 0014
If problem still exists, notify Unit
Maintenance.
If air pressure is not above 60 psi (414
1.
Observe air pressure gage. Air
3.
Parking/Emergency Brake
kPa), check and close air tank drain
pressure must be above 60 psi (414
Will Not Release.
valve(s) if required. If problem still exists,
kPa) in order to release parking brake.
go to test step 2.
2.
Slowly try to move machine forward
If problem still exists, go to test step 3.
to test if brake is released.
3.
Perform parking brake test (WP 0014
If problem still exists, notify Unit
Maintenance.