ROYAL ENFIELD WORKSHOP MANUAL
Section C14 Page 6
The silencer of the "350 and 500 Bullet" from
1961 onwards, may be dismantled for cleaning
before refitting to the machine.
After removing the 5/16 in. nut and tab
washer in the tail, the tail piece and central body
may be drawn off the long central stud located in
the front portion of the silencer.
15. Cleaning the Oil Filter
The oil filter is located in the timing cover
immediately below the return oil pump. The felt
element should be taken out and washed in petrol
after the first 500 miles and every subsequent
2,000 miles. Fit a new element every 5,000 mile.
The filter element is removed by unscrewing
the nut holding the end cap in position. When
reassembling the filter after cleaning, take care
that no grit or other foreign matter is sticking to
it. After emptying the filter chamber it is essential
to run the engine slowly for about five minutes to
ensure that oil is reaching the big ends. If the
timing cover has been removed, fill the filter
chamber with clean oil before replacing the cover.
16. Overhaul of Oil Pumps
Remove the timing cover, as described in
subsection 1.
Remove the end plates from both pumps,
Remove the pump discs and plungers.
Remove the pump spindle which can be
pulled out from the front or return pump end.
Check the fit of the plungers in the pump disc,
which should have a minimum of clearance but
should be able to be moved in and out by hand.
If, when fitting a new disc or plunger, the
plunger is found to be too tight a fit, carefully lap
with metal polish until it is just free. If the pump
disc is not seating properly or if a new pump disc
is being fitted, it should be lapped to the seating
with Special Tool No. E.5425, using
carborundum 360 fine paste or liquid metal polish
until an even grey surface is obtained.
Replacement pump discs have a lip left on the
flat, at the opposite side to the lapped face. The
purpose of this is to hold the disc central in the
housing during lapping-in. It should be filed off
before the pump is finally assembled, care being
taken not to damage the lapped face.
Wash all passages, etc., thoroughly with petrol
after lapping, to remove all trace, of grinding
paste.
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Summary of Contents for 350 BULLET 1956
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