T M 9-4120-360-14
(2) Remove four shoulder bolts (9) and nuts, (13), four bushings (11) and eight of each size of washers (l0&
12) the four support legs of the compressor (See figure 5-4).
(3) Lever the compressor up, and slide it out of the air conditioner.
Install the compressor in the air conditioner as directed in the following procedure:
If refrigeration piping was disconnected with the compressor being replaced, transfer the piping to the re-
placement compressor before installing it in the air conditioner.
a. Mounting. Set the compressor in position on the base plate of the air conditioner. Lever the compressor up,
and insert bushings and washers under support feet (See figure 5-4). Install shoulder bolt and washers from below, and
install nut and washer on top of mounting foot.
b. Tubing Connection. Provide
a 1-2 cfm (0.1-0.2 M/min) flow
of dry nitrogen through the refrigeration
system, and braze tubing joints to connect the compressor:
c. Replacement of Filter-drier.
When the refrigeration system has been opened, a new filter-drier must be installed before re-charging
(1) Unscrew flare nuts from top and bottom connections of the filter-drier.
(2) Remove screw from the band clamp which holds the falter-drier, and remove band clamp and filter-
Do not remove caps from the connections of a new filter-drier until ready to connect system tubing.
(3) Place band clamp on a new filter-drier in such a position that the direction-of-flow arrow will point up
when installed. Attach the filter-drier and band clamp to the casing with the screw previously removed, or equivalent.
(4) (Connect tubing to top and bottom of the filter-drier with flare nuts on tubing.
Leak test the refrigeration system after repair or replacement of any component. Proceed as follows:
to figure 5-8 for identification
of service valves.
Connect a pressure
gauge to the suction service valve,
and a cylinder of refrigerant R22 to the discharge service valve. Open both service valves and the cylinder shutoff valve.
Let refrigerant flow into the system until the pressure gauge indicates 50 psig (3.5 kg /cm). Close cylinder shutoff valve
and discharge service valve, and disconnect the refrigerant cylinder.
Connect a cylinder
of dry nitrogen
to the discharge service valve. Open the cylinder shutoff valve and the
discharge service valve, and pressurize the system to 350 psig (22 kg/cm). Close all three valves and test for leaks, using
an electronic leak detector, or the soap bubble method as described below: