Engine Work; Replacing The Big End Oil Feed Quill Bushing - Royal Enfield Bullet RES 500 Service Manual

CHAPTER 6
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ENGINE WORK
CHAPTER 6
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ENGINE WORK
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REPLACINGTHE BIG E N D O I L FEED QUILL BUSHING
Checking the Quill-style Oil Pressure Feed Bush
First, a quote from Chapter 2: "The Bullet is unique in feeding oil pressure through a hollow feed bolt ( 1 73) into the
rotating right-side crankpin via a hollow quill, sealed by a
CW%
gland-- situated in a recessed internal shoulder in
the end of the crankpin (75). Although this system has proven t o be very reliable over many years, the cork is
somewhat primitive
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most manufacturers of British machines began using modern spring-and-lip neoprene seals
by the end of the '60's
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it is a potential weak point, and should be monitored on a regular basis. Oil change
intervals are a good time to check the quill bushing. (NB: the factory now supply an alternative quill bushing in neoprene,
but users report better performance and reliability-with the original cork ones.)
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Checking may be accomplished by removing the quill feed bolt
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in the center of the timing cover, above the oil
filter housing
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be sure t o have a catch tray t o receive the oil which will drain from the timing cover cavity. Once
this is done, examination may be done with a strong light of the cork quill seal in the end of the crankpin. If there
is any sign of cracking, missing sections, etc., or if it appears t o have a fairly loose fit around the quill,
it
should
be replaced. The knowledgeable Bullet owner will order replacement cork seals ten at a time, and always have
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one o r two of the better ones he has soaking in clean oil, ready for replacing.
The Enfield BULLET MANUAL by Pete Snidal O 2002
59