7–7
T-368
Figure 7.7 Bottom Plate Removed
1. Oil Pressure Relief Valve
2. Oil Return Check Valve
3. Oil Suction Tube
4. Cap Screw
5. Connecting Rod and Cap Assembly
- - - - -
b. Loosen cylinder head cap screws. 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. Remove cyl-
inder head bolts and gasket (see
).
c. Remove valve stops and valves. After they have
been removed, free the valve plate from the cyl-
inder deck by using the outside discharge valve
hold-down cap screw as a jack screw through
the tapped hole of the valve plate. Remove the
valve plate gasket.
d. Turn the compressor on its side and remove the
bottom plate oil suction screen and screen hold
down plate. Inspect the screen for holes or an
accumulation of dirt. The screen can be cleaned
with a suitable solvent.
e. Match mark each connecting rod cap (see
) and connecting rod for correct reassembly.
Remove the bolts and connecting rod caps. Push
the piston rods up as far as they will go without
having the piston rings extend above the cylinders.
CAUTION
!
The copper tube that connects to the oil
suction strainer extends out the bottom
with the bottom plate removed. Take pre-
cautions to avoid bending or breaking it
while changing crankcase positions.
f. If necessary, remove the oil return check valve (see
). Inspect it for proper operation (flow in
one direction only). Replace the assembly with a
new unit if check valve operation is impaired.
g. To remove the oil pump (see
) remove
eight cap screws, oil pump bearing head assem-
bly, gasket, and thrust washer.
Figure 7.8 Oil Pump and Bearing Head
1. Oil Pump & Bearing Head
2. Thrust Washer
3. Oil Pickup Tube
4. Oil Inlet Port
5. Oil Pump Inlet
- - - - -
NOTE
If the oil pump was not operating properly,
the entire oil pump & bearing head assembly
must be replaced. Individual parts are not
available. If the pump requires inspection or
cleaning, disassemble and reassemble by
. Clean all parts and
coat all moving parts with compressor oil
before proceeding with reassembly.
Figure 7.9 Low Profile Oil Pump
1. Cap screws
2. Cover
3. Reversing Assembly
4. Pinion
5. Gear
6. Drive
7. O-Ring
8. Oil Pump & Bearing
9. Set Screw
10. Relief Valve
11. Pin
12. Gasket
- - - - -
Set screw must be removed
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