Carrier 60 Service Manual download pdf (Page 45)

T -295

4-12

0.030 inch (0.41 to 0.76 mm). If required, removethe

eight armature spacer nuts and spacer. Add or remove

shims to adjust gap. Reinstall spacer nuts and tighten

to 7--8 ft/lbs(1.0 to 1,1 mkg).

h.Reconnect wiring and test clutch operation.

4.20.3 Compressor Oil Level

To check, and if required correct, the compressor oil

level do the following:

a. Operate the coach for at least one--half hour at fast

idle speed, with the temperature controls at the cool-

est setting, and the compressor fully loaded. It may be

necessary to pre--heat the coach and/or operate the

system in the reheat mode to keep the compressor ful-

ly loaded throughout this procedure

b. Ensure the system is fully char ged (refer to paragraph

4.8.1) and the compressor crankcase is warm to the

touch after fifteen minutes of operation.

c. Shut off the system and immediately record the oil

level in t he compressor sight glass. See Figure 4-17.

If the compressor is not level, an average between the

sight glass levels will have to be made to determine

level.

d. The proper oil level is between the marks on the com-

pressor crankcase (05G compressors) or between 1/4

and1/2 of the sight glass (05Kcompressors). Referto

Figure 4-17. If the oil level is correct, release the

coach into service. If the level is above the required

amount, proceed to step e.. If the level is below the

required amount proceed to step f.

e. To remove oil and bring the level to the proper

amount, do the following:

1. Pump down the compressor until only a slight posi-

tive pressure remains in the crankcase. Refer to para-

graph 4.5.3.

2. Shut off t he coach engine and ensure the compressor

discharge and suction service valves are frontseated.

Reclaim the remaining refrigerant in the compressor

crankcase.

3. Drain or pump out compressor oil until the level is

brought to the minimum for this compressor.

4. Evacuate the compressor to 500 microns. Backseat

the compressor service valves and repeat the oil level

check procedure.

f. To addoil to thecompressorcrankcase,do thefollow-

ing:

1. With the system off, connect a m anifold gauge set to

the compressor suction and discharge service valves

(SeeFigure 4-5) and reclaim the refrigerant to below

atmospheric pressure. Shut off the reclaimer and

verify the pressure does not rise. If the pressure rises,

continue reclaiming until the pressure remains be-

low atmospheric.

2. Add oil to compressor crankcase slowly, throughthe

oil fill plug opening (see Figure 4-17) to bring level

to mid range of allowed l evels.

3. Evacuate compressor to 500 microns. Backseat

compressor suction and discharge valves, start sys-

tem and recheck oil level.

4. Remove manifold gauge set.

05K - GR45

05G - GR60

1. Electric Unloader

Valve

2. Suction Service

Valve Charging Port

3. Suction Service

Valve

4. Clutch

5. OilFillPlug

6. Bottom Plate

7. Oil Drain Plug

8. Oil Level Sight Glass

9. Oil Pump

10. O-ring

11 .Discharge Service

Valve

12 .Service Port

Figure 4-17. Compressors

4.20.4 Checking Unloader Operation

To check unloader operation do the following:

a. Install a manifold gauge set as shown in Figure 4-6.

Ensure both manifold valves are frontseated and cen-

ter connection is tight on blank fitting.

b. Midseat compressor suction service valve.

c. At thebus roof, disconnect the suction pressuretrans-

ducer (

8, Figure 1-6). This will force the controller to

energize the unloader(s).

d. Start t he bus and run in cooling lower set point if re-

quiredto ensuresystem remains infull speedcooling.

e. Locate the unloader connector at the compressor. Ob-

serve manifold suction gauge while unplugging the

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 55 56

Comments to this Manuals

No comments

Carrier 60 Service Manual Page 45

Comments to this Manuals

Related products and manuals for Unknown Carrier 60