REPLACEMENT (Cont) - TM-55-1905-223-24-170279

TM 55-1905-223-24-17

Remove fill plug (27, FIGURE 4-19) and add new compressor oil until level is at the half-way point in

the observation window (38). Install fill plug (27) and torque to 22 ft-lb.

Evacuate and add refrigerant charge to compressor as follows:

(1)

Connect the common hoseline of a portable gauge manifold to the suction connection (7,

FIGURE 4-23) of a portable vacuum pump (6).

(2)

Connect the high pressure hoseline on the gauge manifold to the charging port (4) on the

discharge valve.

(3)

Connect the compound (suction pressure) hoseline of the gauge manifold to the charging port (9)

on the suction valve.

(4)

Make sure caps (5) and (8) are removed for access to valve stems.

(5)

Close gauge port handwheels (1) and (3) fully clockwise.

(6)

Start the portable vacuum pump (6). Open gauge port handwheels (1) and (3) counterclockwise

one-half to one turn.

(7)

Watch the combination gauge (2). When the pressure has decreased to 3 inches vacuum on the

gauge, close gauge port handwheels (1) and (3) fully clockwise.

(8)

Turn the portable vacuum pump OFF.

(9)

Disconnect the common hoseline on the gauge manifold from the suction connection (9) on the

vacuum pump (8).

(10)

The compressor has now been evacuated and is ready to have R-22 refrigerant charge added.

WARNING

PRESSURIZED GAS HAZARD.

Handle R-22 refrigerant

containers with care to avoid personal injury. Keep containers

away from external heat sources. DO NOT DROP containers.

When in use, place containers where they will not be knocked

over.

(11)

Connect the common hoseline on the gauge manifold to valve connection (8, FIGURE 4-24) on a

R-22 refrigerant container (7).

(12)

Purge hoselines.

(13)

Open gauge port handwheels (1) and (3) counterclockwise one-half to one turn.

(14)

Slowly open the valve (6) on the refrigerant container (7). A hissing sound can be heard as

refrigerant passes from container to compressor.

(15)

When hissing sound has stopped, close gauge port handwheels (1) and (3) fully clockwise.

4-72