Compressor Oil Level; Adding Oil With Compressor In System; Removing Bypass Piston Plug; Model O5G Compressor - Carrier CAPRI-280 Operation And Service Manual

4. Check oil level in service replacement
compressor. (Refer to section 1.3 and 4.12.2.)
GASKET
COMPRESSOR
HEAD
BYPASS
PISTON
PLUG
Figure 4-6. Removing Bypass Piston Plug
h. Remove the high pressure switch assembly and
install on replacement compressor after checking
switch operation.
i. Install compressor in unit by performing steps c.
through h. in reverse. It is recommended that new
locknuts be used when replacing compressor. Install
new gaskets on service valves and tighten bolts
uniformly.
j. Unlock and turn main battery disconnect switch to
ON position..
k. Attach two lines (with hand valves near vacuum
pump) to the suction and discharge service valves.
(Dehydrate and evacuate compressor to 500 microns
(29.90" Hg vacuum = 75.9 cm Hg vacuum). Turn off
valves on both lines to pump.
l. Fully backseat (open counterclockwise) both suction
and discharge service valves.
m. Remove vacuum pump lines and install manifold
gauges.
n. Start unit and check refrigerant level.
o. Check compressor oil level. (Refer to section 4.12.2.)
Add or remove oil if necessary.
p. Check compressor unloader operation.
SPRING
FLANGE capscrews
COVER
(NOT INTERCHANGEABLE
WITH CONTROL VALVE
SCREWS)
12
11
10
9
8
7
1. Electric Unloader
Valve
2. Suction Service
Valve Charging Port
3. Suction Service
Valve
4. Clutch
5. Oil Fill Plug
Figure 4-7. Model O5G Compressor

4.12.2 Compressor Oil Level

4.12.2.1 Checking the Compressor Oil Level
The compressor should be fully loaded (six
cylinder operation); the unit should be fully
charged and the compressor crankcase should be
warm to the touch.
a. Start the unit and allow the system to stabilize.
b. Check the oil sight glass on the compressor to ensure
that no foaming of the oil is present after 20 minutes
of operation. If the oil is foaming excessively after 20
minutes of operation, check the refrigerant system
for flood-back of liquid refrigerant. Correct this
situation before proceeding. (Refer to section 3.3.4.)
c. Check the level of the oil in the oil level sight glass
immediately after shutting down the compressor.
The lowest level visible should be between the "Min"
and "Max" indicators on the compressor crankcase
adjacent to the sight glass. (See Figure 4-8.)

4.12.2.2 Adding Oil with Compressor in System

Two methods for adding oil are: the oil pump method and
closed system method.
a. Oil Pump Method
1. One compressor oil pump that may be purchased is a
Robinair part no. 14388. This oil pump adapts to one
U.S. gallon (3.785 liters) metal refrigeration oil
container and pumps 2-1/2 ounces (72.5 mliters) per
stroke when connected to the suction service valve
port. Also, there is no need to remove pump from can
after each use.
4-7
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
NOTE
T-283
1
2
3
4
5
6