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 (d) When reassembling, oil each part with clean lubricating oil.
(e) Replace defective gaskets.
7.3 Bearings. Replace worn or defective bearings as required. If bearing
replacement becomes necessary, he inner race may be removed from the shaft by
t
heating it with a torch. Care must be taken to heat the inner race only and
not the shaft. The inner race is shrunk onto the shaft, so that heating both
parts will not free the bearing. Never attempt to pull the inner race off the
shaft without heat, as damage to the shaft will result. To install a new
inner race, it is necessary for it to be thoroughly heated in an oil bath to a
temperature of 200F to 300F depending on manufacturer's instructions. It
will then slip easily onto the shaft.
7.4 Clearances. Each time the compressor is inspected internally or
disassembled for repair, clearances must be checked. These include clearances
between the rotor and cylinder, the rotor ends and the cylinder heads, and in
the bearings. Clearances must be closely held for proper operation of the
compressor. Clearances are normally given on the compressor nameplate.
Follow the manufacturer's instructions carefully for setting clearances.
7.5 Lubrication. Rotary sliding vane compressors are normally fitted with
mechanical force-feed lubricators driven from the compressor shaft. On new
compressors,or compressors that have been overhauled, feed about 25 percent
more oil than normal for about 2 weeks until the compressor has been run-in.
For normal operation, the feed should be adjusted to the drip rate indicated
on the lubricator nameplate. Rate of flow can be observed in the sight flow
indicators.
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