Royal Enfield 500 TWIN 1949 Workshop Maintenance Manual Download

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ROYAL ENFIELD WORKSHOP MANUAL

3. Replacing the Light Unit and Bulb

Slacken the securing screw at the top of the

headlamp rim. Remove the front rim and Light
Unit assembly.

Withdraw the adaptor from the Light Unit by

twisting it in an anti-clockwise direction and
pulling it off. Remove the bulb from its locating
sleeve at the rear of the reflector.

Disengage the Light Unit securing springs

from the rim and lift out the Light Unit.

Position the new unit in the rim so that the

word "TOP" on the lens is correctly located
when the assembly is mounted on the headlamp.
Refit the securing springs ensuring that they are
equally spaced around the rim.

Replace the bulb and adaptor. The bulb must

be the Lucas "prefocus" type, 6v. 30/24 watt
Lucas No. 312.

Locate the bottom of the Light Unit and front

rim assembly in the headlamp shell or in the
fixing rim attached to the Casquette fork head.
Press the front on and tighten the securing screw
at the top of the headlamp.

4. Parking Lights

In the case of lamps having separate shells the

parking  bulb  may  be  mounted  either  to  show
through  a  hole  in  the  back  of  the  main  reflector
(Fig. 1) or may be mounted in a separate housing
beneath  the  lamp  shell  (Fig.  2).  In  the  case  of
lamps  fitted  into  a  Casquette  fork  head  twin
parking lights are provided. In all cases the bulb
is  the  same,  i.e.  6v.  3  watt  M.B.C.  Lucas  Part
No. 988.

Access to the parking bulb in the case of

lamps  with  separate  shells  is  obtained  by
removing  the  light  unit  as  described  in
Subsection  2.  In  the  case  of  lamps  in  which the
parking  bulb  shows  through  a  hole  in  the  main
reflector  the  bulb  holder  assembly  should  be
removed.  This  will  come  away  bringing  with  it
the  parking  bulb  which  will  then  be  readily
accessible.

In the case of lamps having the underslung

parking light the parking bulb holder can be
lifted out of the lamp shell after removal of the
light unit.

In the case of lamps fitted into Casquette fork

heads access to the parking bulbs is obtained by
removing the parking lamp rim (see Fig. 4). This
may  merely  be  forced  over  the  edge  of  the
rubber  lamp  body  or  in  the  case  of  later
machines  is  additionally  secured  by  means  of  a
small  fixing  screw.  After  removal  of  the  lamp
rim,  the  parking  lamp  lens  can  be  pulled  out  of
the  rubber  body,  after  which  the  bulb  will  be
accessible.

5. Tail Light

Earlier machines used a circular metal-bodied

tail  light,  either  Lucas  No.  MT110  (Fig.  5)  or
No.  480  (Fig.  6).  In  the  former  case,  access  to
the bulb is obtained by removing the back of the
lamp,  which  will  come  away  bringing  the  bulb
with it. In the latter case, the front of the lamp is
removed, leaving the bulb carrier in position. In
either  case  the  bulb  is  the  same,  that  originally
fitted being 6 volt 3 watt S.B.C., Lucas Part No.
200,  which,  however,  on  machines  of  over  250
c.c.  should  now  be  replaced  by  6  volt  6  watt

S.B.C. Lucas No. 205.

Section G5a Page 2

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