4-6
vapor from the crankcase. It may discharge through a tee
or a single equalizer tube.
j.
If the piston rings extend beyond the cylinder tops,
the pistons can be pulled through the bottom plate
opening after the piston rings are compressed. A piston
ring squeezer made from sheet metal which almost
encircles the periphery of the rings, will facilitate
removal. Each piston pin is locked in place by lock rings
which are snapped into grooves in the piston wall.
1
2
3
4
5
6
7
8
9
10
1. Capscrew
2. Cap
3. Crankshaft
4. Thrust Washer
5. Rotor Drive Key
6. Connecting Rod
7. Compression Ring
8. Piston
9. Pin
10. Retainer
Figure 4-9. Crankshaft Assembly
k. Since the stator is not replaced in the field, the
terminal plate assembly need not be disturbed unless a
leak exists or a terminal part requires replacing.
Disassemble and assemble the terminal plate as
shown in Figure 4-11.
1
2
3
1. Equalizer Tube and Lockscrew Assy
2. Lockwasher
3. Counterweight --- Motor End
Figure 4-10. Removing Equalizing Tube and Lock
Screw Assembly
The terminal mounting plate assembly as originally
installed is assembled so as to leave a small space between
the outer terminal bushing and the surface of the
mounting plate. This is to provide further crush of the
terminal bushing in case a leak should occur. To stop leak,
tighten the terminal bushing nut only enough to stop the
escape of gas. Do not tighten until terminal bushing is
flush with the mounting plate. The tightening torque
used at the factory is 0.21 to 0.23 mkg (18 to 20 inch
pounds) maximum to prevent damage to the plastic parts.
12
11
10
9
7
5
3
1
2
4
6
8
6
NOTE: Parts shown are for one terminal.
1. Terminal Bushing Nut
2. Lock Washer
3. Terminal Washer
4. Outer Terminal Bushing
5. O-Ring
6. Terminal Bushing Washers (Grey)
7. Terminal Bushing Washers (Red)
8. Inner Terminal Bushing
9. Terminal Mounting Plate
10. Cover Gasket
11. Inner Terminal Block
12. Terminal Screw
Figure 4-11. Terminal Mounting Assembly
4.7 COMPRESSOR REASSEMBLY
To clean compressor parts, use a suitable solvent with
proper precautions. Coat all moving parts with
compressor oil before assembly. Refer to Table 4-2, for
applicable compressor torque values.
a. Suction and Discharge Valves
If the valve seats look damaged or worn, replace
valve plate assembly. Always use new valves because it is
difficult to reinstall used discharge valves so that they will
seat as before removal. Any valve wear will cause leakage
for this reason.
Suction valves are positioned by dowel pins (see
Figure 4-12) and will assume their original position when
reinstalled. No two valves are likely to wear exactly the
same. Never interchange used valves.
Do not omit the suction valve positioning springs.
(See Figure 4-12.) Place the springs so that the ends bear
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