Checking The Electrical Setting Of The Cutout; Adjusting The Electrical Setting Of The Regulator - Royal Enfield G Workshop Maintenance Manual

ROYAL ENFIELD 350cc and 500cc O.H.V. WORKSHOP MANUAL
With the ignition switch in the "OFF"
position, start the engine.
Slowly increase the speed of the engine until
the voltmeter needle "flicks" and then steadies.
Note this value and stop the engine.
If this value lies outside the limits given in
paragraph 2(b), the regulator setting must be
adjusted.
If the value is within the limits, examine the
cut-out as described in paragraph 3(c).
e)
(

Adjusting the electrical setting of the regulator

Adjustment of the regulator requires removal
of the control box cover. This is facilitated by
removing the control box from the machine and
providing temporary connections. Loosen the
control box cover securing clips by slackening
the securing screws set in the base of the control
box, and lift off the cover.
It is important that regulator adjustments are
carried out with the control box supported in a
similar position to that on the machine.
Restart the engine.
Slacken the locknut of the regulator adjusting
screw (see Fig. 2) and turn the screw in a
clockwise direction to raise the setting or an
anti-clockwise direction to lower the setting.
Turn the screw only a fraction of a turn at a time
and then tighten the locknut. Repeat as above
until the correct setting is obtained.
Adjustment of regulator open-circuit voltage
should be completed within 30 seconds;
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otherwise heating of the shunt winding will
cause false settings to be made.
Stop the engine.
Remake the original connections and replace
the cover. Ensure that the cover seats correctly
on the sealing washer.
N.B.-A dynamo run at high speed on open
circuit will build up a high voltage. Therefore,
when adjusting the regulator, do not run the
engine up to more than half throttle or a false
setting will be made.
(d) Checking the electrical setting of the
cutout
If the regulator is correctly set but the battery
is still not being charged, the cut-out may be out
of adjustment.
Replace the control box in the testing
position, remake the temporary connections and
remove the control box cover. Connect a
voltmeter between terminals "D" and "E."
Start the engine and slowly increase the
speed until the cut-out contacts close. Note the
voltage at which this occurs and stop the
engine. This should be 6.3-6.7 volts. If
operation of the cut-out takes place outside
these limits, it will be necessary to adjust.
(e) Adjusting the electrical setting of the
cutout
Restart the engine.
Slacken the locknut securing the cut-out
adjusting screw and turn the adjusting screw in a
clockwise direction to raise the voltage setting or
in an anti-clockwise direction to reduce the
setting.
Turn the screw only a fraction of a turn at a
time and then tighten the locknut. Test after each
adjustment by increasing the engine speed and
noting the voltmeter reading at the instant of
contact closure.
Stop the engine.
Electrical setting of the cut-out, like the
regulator, must be made as quickly as possible
because of temperature-rise effects. Tighten the
locknut after making the adjustment.
N.B.-if the cut-out does not operate, there
may be an open-circuit in the wiring of the
cut-out and regulator unit, in which case the unit
should be removed
replacement.
for examination or