TB-9-2510-251-13

TECHNICAL BULLETIN

OPERATOR AND FIELD MAINTENANCE; INSTALLATION MANUAL (INCLUDING REPAIR PARTS LIST); FOR ADD-ON-ARMOR (AoA) AIR CONDITIONING

AUGUST 2007

TB-9-2510-251-13 - Page 297 of 624

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TB 9-2510-251-13

4-12

Receiver/Drier and Accumulator

The receiver-drier and accumulator cannot be serviced or repaired.

They should be replaced

whenever the AC system is opened for any service.

If the receiver-drier or acculator has a pressure

switch to control the clutch, it should be removed and installed on the new unit.

4-13

Compressor and Clutch

Problems with the clutch assembly can be due to low voltage, electrical failure in the coil, the lead wire,

or a bad pulley bearing.

Check first to see that electrical power is reaching the clutch.

The lead wire

and bearing can be replaced and the clutch assembly reinstalled.

If the coil fails, it must be replaced.

If the clutch shows obvious signs of excessive heat, replace the complete assembly.

The compressor

can fail due to shaft seal leaks, defective valve plates, bad

bearings, or problems associated with high

pressure, heat, or lack of lubrication.