AC DOES NOT COOL OR COOLS INADEQUATELY - Continued

DRAFT

TB 9-2320-279-13-1

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.

Remove rings, bracelets, wristwatches, neck chains, and any other jewelry before working around

vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry or tools may short

across electrical circuits or terminals and cause damage to equipment or severe burns or

electrical shock to personnel.

Wear protective goggles and nonleather gloves when servicing air conditioner system. Failure to

comply may result in injury to personnel.

PRESSURE TEST

(1)

Inspect AC test set recovery/recycling manifold

high-side gage reading.

(a) If gage reading is not indicating a high system

high-side pressure for the ambient

temperature indicated in the chart shown on

page 0015-11, go to Step 19 of this fault.

(b) If gage reading is indicating a high system

high-side pressure for the ambient

temperature indicated in the chart shown on

page 0015-11, go to Step 17 of this fault.

VISUAL INSPECTION

(1)

Remove four screws, lockwashers, washers, and

cover from AC condenser assembly (WP 0027).

(2)

Inspect system high-side AC hoses from AC

compressor output to AC heater/evaporator

assembly for frost and cool spots.

(a) If hoses are not free from frost and cool spots:

1. Shut off engine (TM 9-2320-279-10).

2. Recover R-134a refrigerant (WP 0050).

3. Replace restricted AC hose (WP 0040).

4. Replace AC condenser dryer (WP 0025).

5. Evacuate and charge system (WP 0050).

6. Verify repair, go to Step 22 of this fault.

(b) If hoses are free from frost and cool spots, go

to Step 18 of this fault.

HEMAC185