ELECTRICAL COMPONENTS
Starter/Generator
Page 12-4 2000 FE290 Gasoline Vehicle Maintenance and Service Supplement
12
Brush Inspection and Replacement
1. Visually inspect brushes. Replace brushes that are cracked or severely chipped.
2. Check the wear line on the side of the brush. If the end of the brush is within 1/16 of an inch (1.6 mm)
of the wear line, replace all four brushes (Figure 12-5, Page 12-4).
Brush Spring Inspection and Replacement
1. Visually inspect springs. Replace all four springs if any spring is discolored from heat (straw or bluish in color).
2. Install the four brushes (27) into their holders and insert the four brush springs (28) (Figure 12-4,
Page 12-4). Using a spring scale, test brush spring tension. If any spring has a tension less than 24
ounces, replace all four springs (Figure 12-6, Page 12-5). See following CAUTION.
Figure 12-3 Commutator End Cover
Figure 12-4 Brush Installation
Figure 12-5 Inspect Brushes
• WHEN CHECKING BRUSH SPRING TENSION, DO NOT PUSH SPRINGS BEYOND THE POINT
THEY WOULD NORMALLY BE IF THERE WERE NEW BRUSHES INSTALLED. EXERTING
EXCESSIVE FORCE OR PUSHING BRUSH SPRINGS BEYOND THEIR NORMAL MAXIMUM
EXTENSION POINT WILL DAMAGE SPRINGS.
20
23
24
TYPICAL
2 PLACES
26
27
29
23
TYPICAL
3 PLACES
25
TYPICAL
4 PLACES
30
28
0
1
1/2
1/2
STARTER/GENERATOR
BRUSH
WEAR LINE
BRUSH
HOLDER
CAUTION
