Carrier 69NT40-541-505, Operation And Service Manual

Page: 100 / 143

T-368 7–8
h. Be very careful not to damage the motor wind-
ings when removing the motor end cover (see
Figure 7.10 ), as the cover fits over the winding
coils. Loosen the cap screws, break the seal,
and then remove all cap screws except one in
the top of the cover. While holding the cover in
place, remove the remaining cap screw. Do not
allow the cover to drop from its own weight. To
prevent striking the winding, remove the cover
horizontally and in line with the motor axis.
Figure 7.10 Motor End Cover
1. Strainer Screws and Washers
2. Suction Strainer
3. Motor End Cover Gasket
4. Motor End Cover
5. Valve Gasket
6. Suction Service Valve
7. Valve Cap Screw
- - - - -
i. Remove the refrigerant suction strainer. If it is
removed with ease, it may be cleaned with sol-
vent and replaced. If the strainer is broken, cor-
roded or clogged with dirt that is not easily
removed, replace the strainer. Install new gas-
kets upon reassembly.
j. Block the compressor crankshaft so that it cannot
turn. Use a screwdriver to bend back the tabs on
the lockwasher, and remove the equalizer tube
and lock screw assembly (see Figure 7.11 ). The
slingers at the end of the tube draw vapor from
the crankcase. Remove the rotor using a jack
bolt. Insert a brass plug into the rotor hole to pre-
vent damage to the end of the crankshaft.
k. If the piston rings extend beyond the cylinder
tops, the pistons can be pulled through the bot-
tom plate opening after the piston rings are com-
pressed. A piston ring compressor will facilitate
removal. Each piston pin is locked in place by
lock rings, which are snapped into grooves in
the piston wall (see Figure 7.12 ).
l. Since the stator cannot be replaced in the field,
the terminal plate assembly need not be dis-
turbed unless a leak exists and the plate assem-
bly needs to be replaced. If no terminal plate
repair is required, proceed with reassembly.
Figure 7.11 Equalizing Tube and Lock Screw
Assembly
1. Equalizer Tube and Lock Screw Assembly
2. Lockwasher
3. Counterweight - Motor End
- - - - -
Figure 7.12 Crankshaft Assembly
1. Cap Screw
2. Cap
3. Crankshaft
4. Thrust Washer
5. Rotor Drive Key
6. Connecting Rod
7. Compression Ring
8. Piston
9. Pin
10. Retainer
- - - - -
7.8.3 Compressor Reassembly
Clean all compressor parts, using a suitable solvent
with proper precautions. Coat all moving parts with the
proper compressor oil before assembly. Refer to
Table
7–5 for applicable compressor torque values.
1
2
3
4
5
6
7
1
2
3
1
2
3
4
5
6
7
8
9
10
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