Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual, Page: 321 / 413

WSM.124
Section N (Elec. Equip.)
5. Clip the negative lead of a moving coil type
voltmeter, calibrated 0-20 volts, to one
generator terminal and the positive lead to a
good earthing point on the yoke.
6. Gradually increase the engine speed, when the
voltmeter reading should rise rapidly- and
without fluctuation. Do not allow the volt­
meter reading to reach 20 volts, and do not race
the engine in an attempt to increase the voltage.
It is sufficient to run the generator up to a speed
of 1,000 r.p.m. If the voltage does not rise
rapidly and without fluctuation the unit must
be dismantled for internal examination.
Excessive sparking at the commutator in the
above test indicates a defective armature which
must be renewed.
Note.-lf a radio suppression capacitor is fitted
between the output terminal and earth, dis­
connect this capacitor and re-test the generator
before dismantling. If a reading is now given
on the voltmeter, the capacitor is defective and
must be renewed.
If the generator is in good order, remove the
link from between the terminals and restore
the original connections.
To Dismantle (See Fig. 3)
1. Take off the driving pulley and Woodruff key.
2. Unscrew and withdraw the two through bolts
(11).
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s
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I st re-issue
Page 7
3. Withdraw the commutator-end bracket (1)
from the yoke (6).
4. Lift the driving-end bracket and armature
assembly from the yoke. Take care not to lose
the fibre thrust washer (5) from the commu­
tator end of the shaft.
5. The driving-end bracket, which on removal from
the yoke has withdrawn with it the armature
and armature shaft ball-bearing, need not be
separated from the shaft unless the bearing is
suspected and requires examination, or the
armature is to be replaced; in this event the
armature should be removed from the end
bracket by means of a hand press.
Brushgear (Checking with yoke removed)
1. Lift the brushes up into the brush boxes and
secure them in that position by positioning the
brush springs at the sides of the brushes
(see Fig. 4)(A).
2. Fit the commutator-end bracket over. the
commutator and release the brushes.
3. Hold back each of the brush springs and move
the brush by pulling gently on Its flexible con­
nector. lf the movement is sluggish, remove the
brush from its holder and ease the sides by
lightly polishing on a smooth file. Always refit
brushes in their original positions. If the
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I. Commutator end bracket
2. Felt rins
3. Felt rin1 retainer
-4. Bronze bush
5, Fibre washer
6. Yoke
7. Retainin1 cup
8. Felt rin1
9. Terminal
1
0·
10. Terminal uf ..
11. Throu1h bolts
12. Bearin1 recainer
13. Drivin1 end bearin1
14. Corrusated washer
15. Drivins end bracket
Fla. 3 Exploded view of generator