Royal Enfield CONSTELLATION 1958, Руководство по техническому обслуживанию мастерской

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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
discs 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.
Wash all passages, etc., thoroughly with
petrol after lapping to remove all traces of
grinding paste.
Check the pump disc springs for fatigue by
assembling in the timing cover and placing the
pump covers in position. If the springs are
correct, the pump cover should be held 1/4 in.
off the timing cover by the feed pump spring and
1/8 in. off by the return pump spring.
The pump spindle should be renewed if
excessive wear has taken place on the teeth.
Re-assemble the oil pumps, replacing the
paper cover gaskets if necessary. Before fitting
each cover fill the pump chamber with clean oil.
Having assembled the pumps, lay the timing
cover flat and fill the oil ports by means of an
oilcan. Turn the pump spindle with a screw
driver in a clockwise direction looking on the
front and it can then be seen whether the pumps
are operating correctly.
Fill the filter chamber with clean oil and
replace the timing cover, taking great care not to
damage the gasket where the section is narrow.
When the timing cover has been refitted on
the engine, the oil feed to the big ends can be
checked by partially unscrewing the feed plug in
the timing cover between the oil pumps. The oil
return to the tank can be checked by removing
the oil filler cap. The feed to the rockers can be
observed by removing the rocker-box covers,
when oil will be seen flowing down the surface
of the push rods.
22. Removal of the Timing Chains
Remove the magneto and chain (Subsection
25).
Loosen the chain tensioner locknut and stud.
Lift the adjusting plate clear of the chain
tensioner spindle.
Remove the chain tensioner spindle and
sprocket.
Lift the chain off the sprockets.
23. Removal of Pump Worm and Timing
Sprocket
Remove the timing chains (Subsection 22).
Unscrew the oil pump worm by means of the
hexagon head behind it. This is a Left Hand
Thread.
Withdraw the timing sprocket using Special
Tool No. E.4869.
24. Removal of the Camshaft Sprockets
Remove the timing chains (Subsection 22).
Unscrew the camshaft sprocket fixing bolt,
which has a Left Hand Thread , at the same
time holding the sprocket.
Withdraw the sprocket by means of a
suitable extractor.
25. Removal of the Magneto
Remove the timing cover (Subsection 1).
Remove three fixing nuts.
Lift the chain off the sprocket and withdraw
the magneto and sprocket complete.
2 6. Removal of the Engine and Clutch
Sprockets
The primary chain is endless so that it is
necessary to remove both the engine and clutch
sprockets simultaneously.
On early models the alternator stator is
removed by undoing the three fixing screws, but
in the case of later types, the smaller diameter
stator must be withdrawn from the adaptor ring
after removing three nuts. The adaptor ring can
then be removed from the primary chain case
when the three screws have been taken out.
Remove the central hexagon nut securing the
alternator rotor, which can then be drawn off,
taking care not to lose the key.
Unscrew the engine sprocket nut using
Special Tool No. E.4877. The engine sprocket is
mounted on splines and can then be removed
with the clutch sprocket.
To remove the clutch sprocket, disconnect
the clutch cable, unscrew three pressure plate
pins and remove the pressure plate assembly,
the centre retaining ring and the assembly of
driving and driven clutch plates. The clutch
sprocket can then be withdrawn from the centre
after the removal of the large circlip which
secures it.
When replacing the engine sprocket, take
care that the felt washer (neoprene on later
models) is not nipped behind the sprocket. This
would make the engine very stiff to turn over
and would damage the washer and allow
leakage from the crankcase. (See Subsection
31.)
Section C11 Page 7
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