TM-9-2320-361-24-1
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2
AUGUST 2006
TM-9-2320-361-24-1 - Page 172 of 1176
TM 9-2320-361-24-1
0010 00
0010 00-12
COMPRESSED AIR AND BRAKE SYSTEM TROUBLESHOOTING (Contd)
Table 3. Compressed Air Troubleshooting Procedures (Contd).
WARNING
• Do not disconnect air lines before draining air reservoirs.
Small parts under pressure may shoot out with high velocity,
causing injury to personnel.
• Wear eyeshields when working with compressed air system.
Failure to wear eyeshields may result in injury to personnel.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. NO AIR PRESSURE,
OR COMPRESSED
AIR READS BELOW
60 PSI (LOW AIR
PRESSURE
WARNING BUZZER
SOUNDING,
INDICATING
AIR PRESSURE NOT
BUILDING UP TO
NORMAL
OPERATING RANGE
AS INDICATED
BY GAUGE)
1. Check for missing or loose air
compressor drivebelt (3).
2. Check for leaking compressed air
lines and fittings.
3. Start engine (TM 9-2320-361-10)
and feel compressor outlet line (5).
Test 1. Check air reservoirs (1) for air
pressure.
1. Start engine (TM 9-2320-361-
10) and allow air pressure to
build up to normal operating
pressure.
2. Loosen air reservoirs drain
valves (2).
3. Check compressor outlet line
(5) for restrictions.
Test 2. Check for air pressure at air
horn supply line (7).
1. Stop engine and open all drain
valves (2) (TM 9-2320-361-10)
until brake system air
pressure is completely drained.
2. Disconnect air horn supply
line (7).
3. Connect air horn supply line
(7) to test gauge (8).
4. Direct assistant to start
engine (TM 9-2320-361-10)
and allow air pressure to
build up to normal operating
pressure.
If air compressor drivebelt (3) is
missing or loose, replace or adjust
drivebelt (3) (WP 0182 00).
If leaking, repair or replace
compressed air lines or fittings
(TM 9-243).
1. If compressor outlet line (5) is hot,
proceed to test 1.
2. If compressor outlet line (5) is cool
or warm, proceed to test 2.
1. If low amount of air pressure is
released, perform step 3.
2. If high amount of air pressure is
released, proceed to test 2.
1. If compressor outlet line (5) is
restricted, repair or replace
(TM 9-243).
2. If compressor outlet line (5) is not
restricted, proceed to test 2.
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