Dodge 50 Series Starter7 Starter Motor Maintainance

Another splended and helpful page from dodge50.co.uk

Maintainance

Lubrication
The large oil reservoir in the drive end shield need
only be replenished during overhaul periods, when a
supply of Shelltella T27 or BP Energol SHF 100 oil
should be added through the oil plug.

An oil impregnated sintered bronze bush is fitted at the
commutator end, and needs no further attention.

Brush Gear and Commutator

Inspect the brushes at intervals of approximately 500
hours. See that they are free in their guides and that the
leads are quite free for movement, by easing back the
brush springs and pulling gently on the flexible con-
nections. If a brush is inclined to stick, remove it from
its holder and clean the sides with a petrol moistened
cloth.

Be sure to refit the brushes in their original positions
to retain the "bedding". The brushes should be well
bedded (i.e. worn to the commutator periphery) but if
not, wrap a strip of very fine glass or carborundum
paper firmly around the commutator with the abrasive
side outwards. With the brushes in position, rotate the
armature by hand in the normal working direction of
rotation; until the correct brush shape is obtained. If
the brushes are worn down so that the springs are no
longer providing effective pressure, they should be re-
newed. Check the brush spring pressure by hooking a
spring balance under the spring lip. The correct ten-
sion is 30-40 oz (0,85-1,13 kg).

The minimum worn brush length is 4 in (12.7 mm).

It is essential that replacement brushes are the same
grade as those originally fitted. Genuine Perkins spares
should always be used. To remove the brushes, un-
screw the four fixing screws, one to each brush. In
re-assembling care must be taken to re-connect the
field coil and interconnector leads, held by two of the
fixing screws. Before inserting brushes in their holders,
it is advisable to blow through the holders with com-
pressed air or clean them with a cloth moistened with
petrol.

The commutator should be clean, entirely free from
oil or dirt. Any trace of such should be removed by
pressing a clean dry fluffless cloth against it, while
armature is hand rotated.

If the commutator is dirty or discoloured, tilt the brushes
and wrap a strip of fine glass or carborundum paper
(not emery cloth) round the commutator, with the
abrasive side inwards. Rotate the armature by hand
until the surface is even. Clean with a petrol moistened
cloth.

If repair is necessary to the commutator or switch gear
etc., the starter must be dismantled. This should be
done only in accordance with the method given.

STARTER MOTOR
Model M50

General Description

The model M50 starter motor is a (our pole machine of
5 in (127,0 mm) nominal yoke diameter, and has a 21
slot armature.

The drive is of pre-engaged, solenoid operated, push
screw type, incorporating a five roller clutch.
The function of the clutch is to prevent the armature
being rotated at high speed In the event of the engaged
position being held after the engine has started.

The solenoid incorporates a two-stage switching arrangement which ensures that the motor develops its maxi-mum torque only when full pinion-flywheel engagement has been achieved.

Testing on the Vehicle

Ensure that the battery is in a charged condition.
Switch on the lamps and operate the starter button.
If the starter fails to function, but the lights maintain
full brilliance, check the switch and battery connections
to the starter and all external leads. Sluggish action of
the starter can be caused by a poor or faulty connec-
tion.

Difficulty in smooth engagement between starter and
engine flywhee! is probably due to dirt on the starter-
shaft helices preventing free pinion movement. The
shaft should be thoroughly cleaned with cleaning fluid
followed by the application of a small quantity of
Shell SB2628 grease for temperate or cold climates or
Shell Retinex for hot climates.

Maintenance
Brush Gear and Commutator

Inspect the brushes at intervals to ensure that they are
free in their guides and that the leads are quite free
for movement, by easing back the brush springs and
pulling gently on the flexible connections. If a brush
is inclined to stick, remove it from its holder and clean
the sides with a petrol moistened cloth.

It is essential that replacement brushes are the same
grade as those originally fitted. Genuine spares should
always be used. To remove the brushes, unscrew the
four fixing screws, one to each brush. In re-assembling
care must be taken to reconnect the field coil and
interconnector leads, held by two of the fixing screws.
Before inserting brushes in their holders, it is advisable
to blow through the holders with compressed air or
clean them with a cloth moistened with petrol.

The commutator should be clean, entirely free from oil
or dirt. Any trace of such should be removed by
pressing a clean dry fluffless cloth against it, while
armature is hand rotated.

If the commutator is dirty or discoloured, tilt the
brushes and wrap a strip of fine glass or carborundum
paper (not emery cloth) round the commutator, with
the abrasive side inwards. Rotate the armature by hand
until the surface is even. Clean with a petrol moistened
cloth.

If repair is necessary to the commutator or switch gear
etc., the starter must be exchanged or repaired by an
authorised agent.

Every 60,000 miles, (90,000 km) or 2500 running hours,
whichever is the sooner, arrange for the examination
and service of the starter motor.