Royal Enfield CO, Руководство по техническому обслуживанию мастерской

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ROYAL ENFIELD 350cc O.H.V. WORKSHOP MANUAL
Page 34
It is most important that the main dynamo and
field leads are not interchanged either internally or
externally at the dynamo or at the voltage control box.
If the ammeter does not show a charge when the
engine is running at a fair speed, test as follows :
Remove dynamo leads from terminals "D" and
"F". Bridge the two terminals and, with the engine
running at a fast tick-over speed, connect a voltmeter
between the link joining terminals "D" and "F" and the
yoke of the dynamo. Speed up engine slightly when
voltage should rise with speed.
If the dynamo proves to be in order, reconnect
leads at the dynamo.
Next disconnect leads to "D" and "F" terminals at
the voltage regulator. Join these wires together and
test with voltmeter connected between them and a
good earth on the machine. If the voltage rises with
speed then the leads from the dynamo to regulator are
in order.
CONNECTIONS TO VOLTAGE REGULATOR
Fig. 53
At this stage test the battery and connections with
voltmeter :
(1) Test between positive and negative battery
terminals. Reading should be 6 to 7 volts.
(2) Test between positive battery and frame of
motor cycle. No reading indicates bad earth or
broken earth wire from battery to frame.
(3) With engine running at charging speed, turn
front wheel through full lock, to stress cables,
and check for fractures under insulation.
Assuming that components and wiring so far
tested have proved to be in order, now test the control
box and the remaining cables.
Remove the lead from terminal "A" at control
box.
With voltmeter, test between this lead and earth
If a reading is obtained, the wiring from the
battery to this point is in order and the fault lies in the
cutout and regulator unit.
If no reading, connect voltmeter between
terminal No. 3 on headlamp switch, and earth, when a
reading will indicate there is an open circuit in wire
between regulator and switch.
If no reading, test first between terminal "A" at
ammeter and earth, and then terminal "B" and earth. A
voltmeter reading at terminal "A" but not terminal 3
indicates a break in the link between ammeter and
switchbox.
No reading at terminal "A" but a reading at
terminal "B" indicates that the ammeter is open
circuited.
No reading at terminal "B" indicates either a
broken wire between terminal "B" and battery or bad
battery connections.
DYNAMO.
(Lucas Type E. 3.H.M.).
71. Removal.
To remove the dynamo from the magneto portion
of the Magdyno, unscrew from the driving end plate
the securing nut and slacken the two screws in the
clamping band. The dynamo can then be drawn away
from its mounting.
72. Dismantling.
Bend back the tab washer from over the screw
securing the driving pinion and remove the screw.
Withdraw the pinion by means of an extractor. Lift the
two brushes from their holders and unscrew the two
through bolts securing the driving end bracket to the
yoke. Withdraw the end bracket complete with
armature. The armature can be removed from the end
bracket by means of a hand press.
73. Cleaning Commutator and Brushes.
About every 10,000 miles, remove the metal
cover band in order to inspect the commutator and
brushgear. Check that the brushes are clean and move
freely in their holders. If there is any stickiness,
remove the brush and clean the sides with a cloth
moistened with petrol, or by lightly polishing with
fine glass paper. Always replace brushes in their
original positions. Brushes which have worn so that
they do not bear firmly on the commutator, or which
expose the embedded end of the flex on the running
face, must be replaced.
The commutator must be clean and free from
traces of oil or dirt. Clean a dirty or blackened
commutator by pressing a fine duster against it while
the engine is slowly turned over. If the commutator is
very dirty, the duster should be moistened with
petrol.
74. Method of Making Connection to Dynamo or
Regulator Terminals.
To make a connection to the dynamo or regulator
terminals, slacken the fixing screw on the terminal
block and remove the clamping plate.
Withdraw the metal sleeve in each terminal. Pass
about 1 in. of cable through the holes in the clamping
plate and bare the ends for 3/8 in. Fit the metal sleeves
over the cables, bend back the wire over the sleeves
and push them well home into their terminals. Finally
screw down the clamping plate. The leads connected
to the "D" and "F" terminals of the dynamo or
regulator units must not be reversed. To prevent this
occurring the screw in the dynamo terminal block is
off-centre and the screws which secure the regulator
terminal clamping plate are of different sizes.
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