Carrier operating and Service Manual download pdf (Page 43)

T -356

4--10

03/11

4 Check oil level in service replacement

compressor. (Refer to paragraphs 1.7 and

4.14.4.)

1. Electric Unloader

Valve

2. Suction Service

Valve Charging Port

3. Suction Service

Valve

4. Clutch

5. Oil Fill Plug

6. Shaft Seal Reservoir

7. Bottom Plate

8. Oil Drain Plug

9. Oil Level Sight Glass

10. Oil Pump

11. O--ring

12. Discharge Service

Valve

13. Service Port

Figure 4-11. Compressors

g. Remove the three socket head capscrews from the

cylinder head(s) that have unloader valves installed.

SeeFigure 4-12. Removethe unloadervalve andby-

pass piston assembly, keeping the same capscrews

with the assembly. The original unloader valve must

be transferred to the replacement compressor . The

plug arrangement removed from the replacement is

installed intheoriginalcompressor as a seal. If piston

is stuck, it may be extracted by threading a socket

head capscrew into top of piston. A small Teflon seat

ring at the bottom of the bypass piston plug must be

removed.

GASKET

BYPASS

PISTON

PLUG

SPRING

FLANGE

COVER

(NOT INTERCHANGEABLE W ITH

CONTROL VALVE SCREWS)

COMPRESSOR

HEAD

CAPSCREWS

Figure 4-12. Removing Bypass Piston Plug

h. Removethepressureswitchesandinstallonreplace-

mentcompressoraftercheckingswitchoperation(re-

fer to paragraph 4.9).

i. Remove clutch assemble and retain original clutch

key. Install on replacement compressor .

j. Install compressor in unit by performing the removal

steps in reverse. It is recommended that new lock-

nuts be usedwhen replacingcompressor .Installnew

gaskets on service valves and tighten bolts uniformly

(55 to 80 ft--lbs suction and 20 to 30 ft--lbs discharge

service valves).

k. Leak check connections and replace filter--drier. Re-

fer to paragraph 4.5.

l. Usingrefrigeranthosesdesignedforvacuumservice,

connect a vacuumpump(seeFigure 4-4) andevacu-

atecompressor to500microns.Front seat bothman-

ifold valves to isolate the pump.

m. Open compressor service valves.

n. Start unit and check refrigerant level (refer to para-

graph 4.7.1).

o. Check compressor oil level (refer to paragraph

4.14.4). Add or remove oil if necessary.

p. Checkcompressor unloader operation.(refer to para-

graph 4.14.5)

q. Backseat compressor service valves.

r. Remove manifold gauge set.(refer to paragraph 4.3

or paragraph 4.3.1 ).

4.14.3 Transferring Compressor Clutch

To remove a clutch (see Figure 4-13) from a

compressor and install on a replacement compressor,

do the following:

1. Compressor

2. Seal Cover

3. Coil

4. Rotor

5. Rotor Nut

6. Armature

7. Spacer Nuts

8. Retaining Capscrew,

Lockwasher, 3/8 Washer

Figure 4-13. Compressor Clutch

a. Placemainbattery disconnect switch in OFF position

and lock.

b. Tag and disconnect wiring to the clutch.

c. Remove tension on drive belts, remove drive belts.

d. Remove the armature asa completeassembly by re-

movingthe retaining capscrew,lockwasher, andspe-

cial 3/8 washer from the compressor crankshaft.Use

special tool (CTD P/N 07--00240--01) to prevent

crankshaft rotation.

e. Install a 7/8--14 x 4” (CTD P/N 07--00381--00) caps-

crew into the center hole of the armature assembly

and use it as a jacking bolt to remove the armature.

Usetool(CTDP/N07--00240--01)as instepa. topre-

vent crankshaft rotation.

f. Using special tool (CTD P/N 07--00242--01), remove

the rotor nut and rotor . Retain original key.

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Carrier operating and Service Manual Page 43

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