TB 9-2320-360-13&P-1
WAR N I N G
Always use caution when approaching a hot engine. Failure to do so may result in serious burns.
Wear protective goggles and nonleather gloves when servicing A/C or injury may result.
PRESSURE TEST
(1) Inspect A/C test set recovery/recycling
manifold low side gage reading.
(a) If gage reading is not cycling
between 23 and 30 psi, when A/C
compressor clutch cycles, turn
engine switch to OFF position
(TM 9-2320-360-10) and replace
A/C thermostatic switch
(WP 0031 00).
(b) If gage reading cycles between 23
and 30 psi, when the A/C
compressor clutch cycles, go to
Step 8 of this fault.
VISUAL INSPECTION
(1) Inspect A/C system operations.
(a) If system is not providing adequate
cooling at A/C louvers (output
should be 20F (6C) cooler than
ambient temperature in cab),
1 Turn engine switch to OFF
position (TM 9-2320-360-10).
2 Perform leak test
(WP 0038 00).
3 Recover R-134a (WP 0056 00).
4 Repair any leaks found.
5 Replace A/C receiver/dryer
(WP 0054 00).
6 Evacuate and charge system
(WP 0056 00).
7 Verify repair, go to Step 23 of
this fault.
(b) If system is providing adequate
cooling at A/C louvers, go to
Step 23 of this fault.
HETF00479
0042 00-13