DRAFT
TB 9-2320-364-13&P-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
WARNING
Moving engine components can cause severe injury. Keep away from fan, belts, and pulleys while
engine is running.
Wear protective goggles and nonleather gloves when servicing air conditioner system. Failure to
comply may result in injury to personnel.
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VISUAL INSPECTION
NOTE: AC condenser fan may not turn on in extremely
cold, or off in extremely hot ambient temperatures.
While assistant slowly adjusts temperature control
switch from its coldest position to off position
(WP 0004), verify that the on/off cycle for the AC
condenser fan motor varies as the temperature control
switch is adjusted.
(a) If the AC condenser on/off cycle does not vary
when the temperature control switch is
adjusted, turn engine switch OFF
(TM 9-2320-364-10) and replace temperature
control switch (WP 0044). Verify repair, go to
Step 22 of this fault.
(b) If the AC condenser on/off cycle varies when
the temperature control switch is adjusted, go
to Step 9 of this fault.
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VISUAL INSPECTION
(1)
Turn temperature control switch to the coldest
position (fully clockwise) (WP 0004).
(2)
Inspect AC system operation. System output
should be 20F (11.1C) cooler than ambient
temperature of cab.
(a) If AC system is not providing adequate cooling.
1. Shut off engine (TM 9-2320-364-10).
2. Perform leak test (WP 0052).
3. Recover R-134a refrigerant (WP 0053).
PLSAC208
4. Repair leaks found.
5. Replace AC condenser dryer (WP 0024).
6. Evacuate and charge system with new
R-134a refrigerant (WP 0053).
7. Verify repair, go to Step 22 of this fault.
(b) If AC system is providing adequate cooling, go
to Step 22 of this fault.