Ch 6 page 55
ELECTRICAL SYSTEM
SHOP MANUAL
Renewal Carbon brushes
Equipment required
Four spring locks are required to renew the carbon brushes and
springs simply and safely.
These can be easily made from thin sheet steel which is cut into
four pieces approximately 20 x 40 mm.
Work description
Before renewal, the starter motor should be removed.
1 Mark the position of the rear bearing shield with a marker.
2 Remove the rear protection cover.
3 Undo the through bolts and remove the rear bearing shield.
4 Undo the bolts to the carbon brush connections.
5 Fit the spring locks to relieve the spring pressure on the
carbon brushes.
6 Remove the carbon brush retaining plate after marking its
position against the pin housing.
7 Check that the commutator is not damaged.
Wipe it over and clean the commutator segments if
necessary.
8 Remove the carbon brushes and the old
springs with a screwdriver.
9 Place new carbon brushes in the brush
holder. Do not fit the springs yet.
10 Refit the carbon brush retaining plate
according to the mark with the new carbon
brushes and connect the cables to the
carbon brushes.
11 Fit the new springs to the carbon brushes. Use a small
screwdriver in the centre of the springs and clamp them
with it.
Wear protective goggles! The brush holde springs have a very
high spring force.
• Fit the comb which presses the carbon brush in position.
• Tension the spring one half turn.
• Press in the centre of the spring on the attachment plate
12 Refit the bearing shield as indicated by the marks.
13 Fit the protection cover.
14 Refit the starter motor.
WARNING
Figure 35
Figure 38
Figure 36
Figure 37
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