Service manual

6-10T-294-01
r. Remove vacuum pump lines.
s. Start unit and check refrigerant charge. (Refer to
section 6.7.1.)
t. Check moisture-liquid indicator for wetness.
Change filter-drier if necessary. (Refer to section
6.12)
u. Check compressor oil level per section 6.11. Add
oil if necessary.
6.9 COMPRESSOR DISASSEMBLY
WARNING
Before disassembly of the compressormake
sure to relieve the internal pressure very
carefully by slightly loosening the bolts on
both suction and discharge flanges, then
lightly tap the center of the valve flanges
with a lead hammer to break the seal.
CAUTION
Removing the press-fit stator in the field is
not recommended. The rotor and stator are
amatchedpairandshouldnotbeseparated.
When disassembling compressor, matchmark parts so
they may be replaced in their same relative positions.
(See Figure 6-6 compressor illustration.) Refer to
Table 6-7andTable 6-8forcompressorwearlimitsand
bolt t orque values.
a. Place the compressor in a position where it will be
convenient to drainthe oil. Remove theoil plug on
the oil pump inlet passage (see Figure 6-9 for
location) to vent the crankcase. Loosen the drain
plug (seeFigure 6-6)in bottom plate and allowthe
oil to drain out slowly. Remove the plug slowly to
relieve any crankcase pressure. Som e units have a
plug in the bottom center of the crankcase which
may be removed for draining the motor end more
quickly.
b. Remove cylinder head capscrews. If the cylinder
head is stuck, tap the center of the cylinder head
with a wooden or lead mallet. DO NOT STRIKE
THE SIDE OF THE CYLINDER HEAD! Be
careful not to drop the head or damage the gasket
sealing surface. (See Figure 6-6 and Figure 6-7.)
Remove cylinder head gasket.
12 3 4 5 7
6
Jack here
1. Cylinder Head Gasket
2. Discharge Valve Screw and Lockwasher
3. Discharge Valve Stop
4. Discharge Valve
5. Valve Plate
6. Valve Plate Assembly
7. Valve Plate Gasket
Figure 6-7. Exploded View of Valve Plate
1
2
3
4
5
1. Oil Pressure Relief Valve
2. Oil Return Check Valve
3. Oil Suction Tube
4. Capscrew
5. Connecting Rod and Cap Assembly
Figure 6-8. Bottom Plate Removed
c. Remove valve stops and valves. After they have
beenremoved,freethevalveplatefromthecylinder
deck by using the outside discharge valve
hold-down capscrew as a jack screw through the
tapped hole of the valve plate. Remove the valve
plate gasket, see F igure 6-7, item 7.
d. Turn the compressor on its side and remove the
bottom plate and the oil suction screen hold down
plate. Match mark each connecting rod cap and
connecting rod for correct reassembly. Removethe
bolts and connecting rod caps (see Figure 6-8).
Pushthepistonrodsupasfarastheywillgowithout
havingthe piston rings extend above thecylinders.