4.4
Replacing Compressor Valve Plate - If valve replacement becomes necessary, follow these instructions:
1)
Close suction and discharge service and slowly remove refrigerant from compressor.
2)
Remove heads.
3)
If the suction valve has failed, remove any raised places from the piston. This can be accomplished
with a pocket knife on those models with cast iron pistons. If there have been any sharp edges
raised on the suction valve stop, they should be removed by the use of a small honing stone or a
similar type stone.
CAUTION
CARE SHOULD BE EXERCISED TO SEE THAT GRIT OR OTHER FOREIGN PARTICLES DO
NOT GET IN THE CRANKCASE
4)
Remove the old gaskets from compressor and replace wit
h new gaskets that come with replacement
valve plate. Make sure the gasket is positioned properly.
CAUTION
DO NOT LEAVE OLD GASKET ON THE MACHINE WHEN INSTALLING NEW GASKET SINCE
THIS WILL AFFECT DESIGN CLEARANCE AND CAUSE SUCTION VALVE TO FAIL.
5)
Replace valve plate and heads.
6)
Purge and evacuate compressor.
7)
Start compressor.
CAUTION
VALVE FAILURES ARE OFTEN CAUSED BY THE ENTRANCEINTO THE CYLINDERS OF
SOLID MATTER (EITHER LIQUID REFRIGERANT, OIL OR BOTH). AFTER A FAILURE, IT
MAY BE WISE TO OBSERVE THE COMPRESSOR THROUGHOUT ITS ENTIRE CYCLE AND
CORRECT ANY OBSERVED MALFUNCTION THAT COULD CAUSE VALVE FAILURE.
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