REPAIR - TM-55-1905-223-24-170237

TM 55-1905-223-24-17

WARNING

Make sure electrical power is OFF during adjustment.

(2) Remove the screw (8) and slide cover (5) from switch (3) for access to adjusting wheel (11).

(3) To raise the cutout setting pointer (9), turn the adjusting wheel (11) in a clockwise direction as

viewed from the front of the switch. Turn the adjusting wheel counterclockwise to lower the cutout

setting pointer.

(4) Adjust as required to set the pointer (9) to a reading of 10 psi on the setting indicator (10).

(5) Replace the cover (5) on the switch (3) with screw (8).

b. Restore electrical power.

REPAIR

WARNING

Make sure electrical power is OFF to avoid personal injury.

CAUTION

If the accommodations unit (A/C-2) main power breaker, or disconnect switch, has

been turned OFF for over 4 hours, the HEAT/OFF/COOL manual switch on

thermostat must remain OFF for a period of 5 hours after turning main power

breaker, or disconnect, ON. This energizes the compressor crankcase heater and

allows the oil time to reheat.

a. Replace pressure switch (3, FIGURE 4-4) as follows:

(1) Remove screw (8) and slide cover (5) from pressure switch (3) to access electrical wiring

connections.

(2) Tag and disconnect external wiring to pressure switch (3).

WARNING

Make sure system has been pumped down or that all tubing, lines, and compressor

have been purged of refrigerant charge before disconnecting oil line fittings (Item

(3) Disconnect oil pressure line connection (2).

(4) Disconnect compressor crankcase connection (7).

(5) Remove the two screws (4) holding the pressure switch (3) to its mounting bracket.

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