Royal Enfield 350 BULLET 1949, Руководство по техническому обслуживанию мастерской

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ROYAL ENFIELD WORKSHOP MANUAL
(iii) Start the engine and set to run at normal
idling speed.
(iv) Connect the negative lead of a moving coil
voltmeter, calibrated 0-10 volts, to one of the
dynamo terminals and connect the positive lead to a
good earthing point on the dynamo yoke or engine.
Reverse voltmeter connections on negative earth
machines.
(v) Gradually increase the engine speed, when
the voltmeter reading should rise rapidly and without
fluctuation. Do not allow the voltmeter reading to
rise above 10 volts and do not race the engine in an
attempt to increase the voltage. It is sufficient to run
the dynamo up to a speed of 1,000 r.p.m. If there is
no reading, check the brush gear, as described in (vi)
below. If there is a low reading of approximately 1/2
volt, the field winding may be at fault, see
Subsection 4(d). If there is a reading of
approximately 1.1/2 to 2 volts, the armature winding
may be at fault, see Subsection 4 (e).
(vi) Remove the cover band and examine the
brushes and commutator. Hold back each of the
brush springs and move the brush by pulling gently
on its flexible connector. If the movement is
sluggish, remove the brush from its holder and ease
the sides by lightly polishing on a smooth file.
Always replace brushes in their original positions. If
the brushes are worn so that they do not bear on the
commutator or if the brush flexible is exposed on the
running face, new brushes must be fitted.
Test the brush spring tension with a spring scale
(see Fig. 2). The correct tension is 16 - 20 oz. and
new springs must be fitted if the tension is low.
If the commutator is blackened or dirty, clean it
by holding a petrol-moistened cloth against it while
the engine is turned slowly by means of the kick
start, with sparking plug(s) removed.
Re-test the dynamo as in (v) above. If there is still
no reading on the voltmeter there is an internal fault
and the complete unit should be replaced if a spare is
available. Otherwise the unit must be dismantled, see
Subsection 4 (b) for internal examination.
(vii) If the dynamo is in good order, restore the
original connections. Connect regulator unit terminal
"D" to dynamo terminal "D" and regulator terminal
"F" to dynamo terminal "F" and check the regulator.
4 (b). To Dismantle
Remove the dynamo from the motor cycle. To
detach the dynamo from the Magdyno, unscrew the
hexagon headed nut from the driving end cover and
slacken the screws securing the band clip.
To dismantle the dynamo proceed as follows: Bend
back the tag on the washer "B" locking the screw "A"
(see Fig. 1). Remove this screw, withdraw the gear
"C" from the shaft with the aid of an extractor and
remove the key(s) "D" from the shaft.
(ii) Remove the cover band "H," hold back the
brush springs and lift the brushes from their holders.
(iii) Take out the screw "J" with spring washer
from the centre of the black moulded end cap "G."
Draw the cap away from the end bracket, take off
terminal nut "F" and spring washer, and lift the
connections off the terminals.
(iv) Unscrew and remove from the drive end
bracket the two through bolts "L"securing the drive
end bracket "N" and commutator end bracket "Q" to
the yoke "M." Hold the nuts “K” at the commutator
Section G2b Page 2
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