12
SERVICE
Service Notes
1. Where compressor components are shown, they are in
normal order of removal from compressor.
2. For replacement items, use Carrier specified parts.
See Carrier 06D Specified Parts list for compressor part
interchangeability.
3. Before compressor is opened, the refrigerant must be
removed from it by the Pumpdown method.
a. Start compressor, close suction shutoff valve, and
reduce crankcase pressure to 2 psig (bypass low
pressurestat with jumper).
b. Stop compressor and isolate from system by
closing discharge shutoff valve.
c. Bleed any residual refrigerant. Drain oil if
necessary.
4. After disassembly, clean all parts with solvent. Use
mineral spirits, white gasoline or naphtha.
5. Before assembly, coat all parts with compressor oil and
clean and inspect all gasket surfaces. Replace all gaskets
with new standard specified gaskets, coated with
compressor oil. See Table 5 for typical torque values.
6. After reassembly, evacuate compressor and open suction
and discharge valves. Restart compressor and adjust
refrigerant charge.
Table 5 — Torque Values
LEGEND
NEF —
National Extra Fine
Testing Oil Pump —
Observe oil level sight glass. The
oil pressure relief valve line is positioned to discharge oil
against sight glass. When oil does not discharge from this line,
it is an indication of low oil pump pressure.
If oil pump pressure is low, remove and check oil filter
screen, oil pressure regulator and oil return check valve.
OIL PRESSURE RELIEF VALVE (Fig. 11) — Unscrew re-
lief valve assembly from motor partition plate, and be sure
assembly is not clogged or the plunger is not stuck.
OIL RETURN CHECK VALVE (Fig. 11) — Unscrew check
valve from motor partition plate. Be sure flutter valve is not
sticking and that it seats tightly.
OIL FILTER SCREEN (Fig. 12) — Screen is accessible
through bottom cover plate. Remove and inspect strainer for
holes and dirt. Clean it with solvent and replace.
OIL PUMP AND BEARING HEAD (Fig. 12) — The oil
pump assembly is contained in the pump end bearing head
aluminum casting. The pump end main bearing is a machined
part of this casting. An insert bearing is not required.
Remove Bearing Head Assembly from Crankcase
— Remove
in sequence (refer to Fig. 12 and 13): oil pump cover, oil feed
guide retaining spring, oil feed guide, pump drive segment. If
damage to the oil pump or main bearing is found, a new pump
end bearing head assembly should be installed.
Replace (Refer to Fig. 12 and 13)
— For torque values, refer
to Table 5. Following steps are used to replace bearing head:
1. Bolt bearing head to crankcase. Place pump drive seg-
ment into position and secure to end of crankshaft with
cap screws and lock washers that were removed (see
Fig. 13).
2. Insert oil feed guide with large diameter inward and place
guide retainer spring over small diameter of guide.
3. Install gasket and oil pump cover.
Do not remove the compressor terminal box cover until
all electrical power is disconnected and pressure is
relieved. Terminal pins may blow out causing injuries,
death, and/or fire.
SIZE
DIAM
(in.)
THREADS
PER IN.
TORQUE
RANGE
(lb-ft)
USAGE
1
/
16
27 (pipe) 8-12 Pipe Plug — Crankshaft
1
/
8
20 (pipe) 6-10
Oil Return Check Valve —
Crankcase
1
/
4
20 (pipe) 20-25 Pipe Plug — Press. Gage Conn.
20 10-12 Connecting Rod Capscrew
28
12-15 Baffle Plate — Crankcase
12-15 Side Shield
12-15 Oil Pump Drive Segment
12-15 Unloader Valve
5
/
16
18
16-20
Cover Plate — Pump End
Bearing Head
16-20 Terminal Block Cap Screws
20-25 Suction Service Valve
20-25 Discharge Service Valve
3
/
8
16
30-35 Pump End Bearing Head
30-35 Bottom Plate — Crankcase
30-35 Compressor Foot
30-35 Cylinder Head
30-35 Motor End Cover — Crankcase
7
/
16
14 55-60 Motor End Cover — Crankcase
1
/
2
13 80-90 Suction Service Valve
5
/
8
11 25-30 Crankshaft Spinner Tube
No. 10
32 4- 6 Oil Pump Drive Segment
1
1
/
2
18 NEF 35-45 Oil Level Sight Glass
8
7
1
2
3
4
5
6
LEGEND
Fig. 11 — Compressor
(Bottom Plate Removed)
1—
Oil Pressure Relief Valve
5—
Eccentric Shaft
2—
Piston and Eccentric
Strap Assembly
6—
Eccentric Strap Side
Shield
3—
Motor End Counterweight
7—
Oil Suction Tube
4—
Oil Return Check Valve
8—
Pump End Counterweight
