Royal Enfield METEOR MINOR STANDARD 1958 Workshop Maintenance Manual page 47

During this stroke the pressure on the underside
of the valve plate (38073) causes this to lift so
that oil can also pass from "A" to "B" through
the eight holes in the valve body. Since,
however, the diameter of chamber "B" is less
than that of chamber "A" there is not room in
"B" to receive all the oil which must be
displaced from "A" as the fork operates. The
surplus oil passes through the cross hole in the
spring stud and up the centre hole in the stud,
spilling out through the nut (38076) which
secures the upper end of the spring stud to the
bronze guide at the lower end of the fork spring.
On the rebound stroke the oil in the damper
chamber "B" is forced through the annular space
between the spring stud and the bore, of the main
tube valve port. During this stroke pressure in
chamber "B" closes the two disc valves at the
upper and lower ends of the chamber so that the
only path through which the oil can escape is the
annular space between the spring stud and the
port. Damping on the rebound stroke is therefore
heavier than on the bump stroke. At the extreme
end of either bump or rebound stroke a small
taper portion on the spring stud enters the bore of
the valve port, thus restricting the annular space
and increasing the amount of damping. At the
extreme end of the bump stroke the larger
diameter taper on the oil control collar (38075)
enters the main counter-bore of the valve port
thus forming a hydraulic cushion to prevent
metal to metal contact.
MAIN TUBE SPANNER
3. Dismantling the Fork to Replace Spring,
Oil Seal or Bearing Bushes
Place the machine on the centre stand,
disconnect the front brake control and remove
the front wheel and mudguard complete with
stays.
Section J6 Page 2
Fig. 2
Knock the rearmost cap stud upwards into the
fork with a soft mallet, which will allow oil to
run out of the fork. Pull the fork bottom tube
down as far as possible, thus exposing the oil
seal housing (38157). Unscrew this housing
either by means of a spanner on the flats with
which it is provided or by using the gland nut
hand grips (E.4912).
MAIN TUBE SEAL GUIDE
The bottom tube can now be withdrawn
completely from the main tube, leaving the
bottom tube bush, oil seal housing and oil seal in
position on the main tube.
Now unscrew the main tube valve port using
"C" spanner (E.5418). The spring stud and
spring can now be withdrawn from the lower
end of the main tube.
The steel main tube bush (38156) can now be
tapped off the lower end of the tube, if necessary
using the bottom tube bush for this purpose.
Before doing this, however, it is advisable to
mark the position of the bush with a pencil line
so as to ensure reassembling it in the same
position on the main tube. The reason for this is
that these bushes are finish ground to size after
fitting on to the tubes so as to ensure
concentricity. After removal of the main tube
bush the bottom tube bush, oil seal housing and
oil seal can be removed.
In case of difficulty in removing the main
tube bush it is possible to withdraw the oil seal
housing after loosening the crown clip bolt
39038. Removing the plug screw 38968, and
unscrewing the main tube from the fork head by
means of a hexagon bar 1/2 in. across flats
(Unbrako wrench W.11) or the special tool
shown in Fig. 2.
Fig. 3