4-9
If it was determined that the oil pump was not
operating properly, the entire oil pump and bearing head
assembly must be replaced. Replacement parts for the
pump are not available.
To remove the oil pump. Remove eight capscrews, oil
pump bearing head assembly, gasket and thrust washer.
(See Figure 4-9)
2
1
3
4
1. Oil Pump & Bearing Head
2. Thrust Washer (Gear Pump Only)
3. Oil Pickup Tube
4. Oil Inlet Port
5. Oil Pump Inlet
5
Set screw must be removed
for Low Profile Gear Pump.
Figure 4-9. Oil Pump and Bearing Head
g. Be very careful not to damage the motor windings
when removing the motor end cover as the cover fits over
the winding coils. Remove all capscrews except one in the
top of the cover. Then, while holding the cover in place,
remove the remaining capscrew. Do not allow the cover
to drop from its own weight. To prevent striking the
winding, move the cover off horizontally and in line with
the motor axis.
h. Remove the refrigerant suction strainer and if it is
removed with ease it may be cleaned with solvent and
replaced. (See Figure 4-10.) If the strainer is broken,
corroded or clogged with dirt that is not easily removed,
replace the strainer. Install new gaskets upon reassembly.
i.
Block the compressor crankshaft so that it cannot
turn. Use a screw driver to bend back the tabs on the
lockwasher and remove the equalizer tube. (See
Figure 4-12.) The slinger at the end of the shaft draws
vapor from the crankcase. It may discharge through a tee
or a single equalizer tube.
1
2
3
4
5
6
7
1. Valve Capscrew
2. Suction Service Valve
3. Valve Gasket
4. Motor End Cover
5. Motor End Cover Gasket
6. Suction Strainer
7. Strainer Screws and Washers
Figure 4-10. Motor End Cover
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-compresser 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 4-11. 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 4-13.
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