Heavy Duty Balanced Opposed Compressors
Heavy Duty Balanced Opposed Compressors
Heavy Duty Balanced Opposed Compressors
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FOR MODELS: JG AND JGA SECTION 5 - MAINTENANCE<br />
crankshaft level. Wear gloves to avoid being cut by the slinger and to achieve a<br />
good grip. The gloves should be clean to avoid marring of the running surface.<br />
As the shaft is being slowly raised, the drive and auxiliary ends should be lifted<br />
at the same rate. Again, care must be taken to avoid marring the crankshaft surfaces<br />
by carefully guiding the crankshaft.<br />
Crankshaft - Oil Slinger<br />
Removal<br />
Although the slinger should last indefinitely with proper care, it can become nicked. Should it<br />
need replacement, suspend the crankshaft on a sling(s) as in “” on page 5-8 and heat the<br />
slinger to 400° F (240°C). It will attain a yellow glow at this temperature. When it has<br />
expanded it should fall off by itself. DO NOT TOUCH HOT SURFACES WITHOUT PROPER<br />
INSULATION TO PREVENT INJURY.<br />
Installation<br />
Put a rod at least 1/2 inches (13 mm) in diameter through the slinger. (Special care should<br />
be exercised when handling the slinger, not only to keep its surfaces unmarred, but to avoid<br />
being cut by the outer sharp edge.) After the slinger is suspended heat it with a small torch.<br />
When it has attained a yellow glow, approximately 400° F (240°C), it can be slipped over the<br />
drive end of the crankshaft. Hold the slinger in position with high temperature gloves or two<br />
pieces of clean wood, rotating it slightly to make sure it is square, until it has cooled enough<br />
to shrink onto the crankshaft. DO NOT TOUCH HOT SURFACES WITHOUT PROPER<br />
INSULATION TO PREVENT INJURY.<br />
Crankshaft - Chain Sprocket<br />
Removal<br />
Examine the sprocket carefully for signs of wear. If it has been in operation for five years or<br />
more, it may be convenient to replace it if the crankshaft is removed from the frame.<br />
Drill a hole in the sprocket hub. This hole should be parallel to the shaft centerline and big<br />
enough that it removes most of the hub cross section. (See Figure 5-6:) Be careful not to<br />
touch the shaft with the drill. Mark the drill with tape so you do not drill through the sprocket<br />
and into the crankshaft face.<br />
PAGE 5 - 10 11/01
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