ROYAL ENFIELD 350cc and 500cc O.H.V. WORKSHOP MANUAL
Page 52
The leads to the lighting switch and ammeter
should be disconnected from the battery,
regulator, tail lamp, etc. at their lower ends or
by means of the plug and socket connectors
when these are provided. The switch and
ammeter are push fits into the rubber bushes
(LU/365408) in the fork head.
Disconnect the speedometer drive from the
speedometer head and unscrew the steering
damper knob and rod (if fitted) after removal of
the split pin through the lower end of the rod.
Undo the steering damper anchor plate pin so as
to disconnect the damper from the frame of the
machine.
Remove the two plug screws (38968) and
loosen the steering head clip bolt and the two
fork crown clamp bolts.
Now unscrew the fork main tubes from the
fork head and the steering stem locknut from the
top of the steering stem, turning each tube and
the nut a turn or two at a time. When the nut has
been removed from the steering stem and the
main tubes have been completely unscrewed
from the fork head the complete fork and wheel
with steering stem can be lifted out of the head
lug of the frame.
8. Lubrication
The lubrication of the fork bearings is
effected by the oil which forms the hydraulic
damping medium. All that is necessary is to
keep sufficient oil in the fork to ensure that the
top end of the bottom spring stud is never
uncovered even in the full rebound position. The
level of oil in the fork can be gauged by
removing the top plug screw and inserting a
long rod about 3/8 in. diameter. If slightly tilted
this will ledge against the nut at the upper end of
the bottom spring stud and indicate the level of
oil above the stud. If the fork is empty to start
with the quantity required is approximately
7.1/2 fluid ounces in each leg. Recommended
grades of oil are Castrolite, Mobiloil Arctic,
Essolube 20, B.P. Energol S.A.E. 20 and Shell
X-100 20/20W.
9. Air Vents
The earlier forks of this type were provided
with holes at the upper end of each main tube
communicating with small vent holes in the
Casquette head. Experience has shown that on
rough roads oil may escape through these air
vents which in consequence are now omitted.
Escape of oil from the earlier forks can be
largely eliminated by fitting specially long plug
screws, which are available. The Part Number is
40118. If these are fitted and the final vent hole
is stopped up with a wooden plug leakage at this
point is impossible. Fitting the special plug
screws alone is sufficient in most instances.
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