Brush And Brush Spring Service - Toro Workman 1100 Service Manual

Brush and Brush Spring Service (Fig. 22)
IMPORTANT: When removing or installing the com-
mutator end cover, make sure brushes do not con-
tact the commutator. Damage to the brushes may
result.
1. Remove brush covers from the commutator end cov-
er. Lift brush springs from the notch at the end of the
brushes while pulling the brushes out. Allow springs to
hold brushes out from the center (Fig. 23).
2. Remove both through bolts and flat washers secur-
ing the commutator end cover to the yoke. Separate end
cover from the commutator and yoke.
IMPORTANT: Use clean, dry, lint–free rags when
cleaning the starter/generator. When using com-
pressed air, air should be filtered and not exceed 15
PSI (1 Bar).
3. Remove brushes from their holders. Clean carbon
dust from the commutator end cover and brushes.
IMPORTANT: Label armature leads connected to
brush leads prior to disconnecting any brush leads.
4. Inspect brushes for damage.
A. Replace any brush that is cracked or severely
chipped.
B. If the length from the end of the brush to the wear
line is less than 1/16 inch (1.6 mm), replace all four
brushes (Fig. 24).
5. Inspect brush springs for heat discoloration. Replace
all four brushes if any brush is straw or bluish colored.
6. Check brush springs for correct tension.
A. Secure all four brushes into their holders with the
brush springs.
B. Using a spring scale, check tension on all four
brushes in the direction of the spring (Fig. 25).
C. Replace all four springs if any spring's tension is
less than 24 ounces (1.6 N).
7. Secure brush and armature leads with set screws
and lock washers.
8. Lift brush springs from the notch at the end of the
brushes while pulling the brushes out. Allow springs to
hold brushes out from the center (Fig. 23).
9. Position commutator end cover to the commutator
and yoke. Secure commutator end cover to the yoke
with both through bolts and flat washers. Torque bolts
from 95.5 to 104 in–lbs (10.8 to 11.8 N–m).
Workman 1100/1110/2100/2110
10.Slide brushes into holders. Secure brushes by posi-
tioning brush springs into the notch at the end of the
brushes (Fig. 25).
11. Install brush covers to the commutator end cover.
3
2
1. Brush
2. Spring
1
4
1. Brush
2. Brush holder
24 oz
(6.7 N)
1. Brush spring
2. Brush
Page 6 – 19
1
Figure 23
3. Brush holder
3
1/16 inch
(1.6 mm)
2
Figure 24
3. Wear line
4. Set screw
3
2
Figure 25
3. Brush holder
Electrical System
1