Compressor Oil Level; Checking Compressor Oil Level; Adding Oil With Compressor In System - Carrier VECTOR 6500 Operation & Service Manual

d. If it is determined that the oil pump is not operating
properly, the entire oil pump and bearing head as-
sembly must be replaced. Replacement parts for the
pump are not available except for the cover plate
O-ring. However, in the event the pump requires in-
spection or cleaning, refer to Figure 8−23 for disas-
sembly and reassembly. Clean all parts; coat all mov-
ing parts with compressor oil before proceeding with
reassembly.
5
4
3
2
1
7
1 Capscrews
2 Cover
3 Eccentric Ring
4 Rotor
5 Idler
6 Shaft (Drive)
Figure 8−23 Oil Pump
e. Install the pump end thrust washer on the two dowel
pins located on the bearing head. (See Figure 8−22.)
CAUTION
Ensure that thrust washer does not fall off
dowel pins while installing oil pump.
f. Install the bearing head assembly with a new gasket
on the compressor crankshaft. Carefully push oil
pump on by hand ensuring that the thrust washer re-
mains on the dowel pins, the tang on the end of the
drive engages the slot in the crankshaft, and the oil
inlet port on the pump is aligned with the oil pickup
tube in the crankcase. The oil pump should mount
flush with the crankcase with the word "TOP" stamp
on the pump oriented straight up.
g. Align the gasket and install the eight capscrews in the
mounting flange. Torque capscrews, in a diagonal
pattern, 30 to 50 ft-lbs (40.7 to 87 Nm).
h. Leak check and evacuate the compressor. Refer to
Sections 8.6.3 and 8.6.4.

8.7.5 Compressor Oil Level

a. Checking Compressor Oil Level
62-11389
12
11
6
10
9
8
7 O-Ring
8 Oil Pump & Bearing
9 Dowel Pin
10 Relief Valve Assembly
11 Pins (2)
12 Thrust Washer
An overcharge of oil will reduce system ca-
pacity and possibly cause internal com-
pressor damage.
1 Operate the unit in Cool Mode for at least 20 minutes.
2 Check the oil sight glass 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 opera-
tion, check the refrigerant system for flood-back of liq-
uid refrigerant. Correct this situation before perform-
ing step 3
3 Turn unit off to check the oil level. The correct oil level
range should be 1/8 to 1/2 glass. If level is above 1/2
glass or below 1/8 glass, continue with the following
steps as required.
b. Adding Oil With Compressor In System
Use only Carrier Transicold approved Poly-
ol Ester Oil (POE). Buy quantities of one gal-
lon or less. When using this hygroscopic
oil, immediately reseal. Do not leave con-
tainer of oil open or contamination will oc-
cur.
Two methods for adding oil are the oil pump method and
closed system method.
Oil Pump Method
One compressor oil pump that may be purchased is a
Robinair, part no. 14388. This oil pump adapts to a one
U.S. gallon (3.785 liters) metal refrigeration oil container
and pumps 2-1/2 ounces (0.0725 liters) per stroke when
connected to the oil fill (Item 12, Figure 8−19). There is
no need to remove pump from can after each use.
When the compressor is in operation, the pump check
valve prevents the loss of refrigerant, while allowing the
technician to develop sufficient pressure to overcome
the operating suction pressure to add oil as necessary.
Backseat suction service valve and connect oil charging
hose to oil fill. Purge the oil hose at oil pump. Add oil as
necessary.
Closed System Method
Extreme care must be taken to ensure the
hose is immersed in the oil at all times.
Otherwise air and moisture will be drawn
into the compressor.
In an emergency where an oil pump is not available, oil
may be drawn into the compressor through the suction
service valve.
1. Pump down the compressor. Refer to Section 8.6.2.
2. With both manifold gauge set valves frontseated,
leave the suction connection connected to the com-
8−24
CAUTION
CAUTION
CAUTION