27
Fig. 57
BRUSH INSPECTION AND REPLACEMENT
CAUTION: BEFORE INSPECTING BRUSHES, DISCONNECT THE MACHINE FROMTHE
POWERSOURCE.
Brush life varies. It depends on the load on the motor . Check the brushes af ter the first 50
hours of use for a new machine, or af ter a new set of brushes has been inst alled.
Af ter the first check, examine them af ter about 10 hours of use until such time that replace -
ment is necessary.
The brush holders (A) Fig. 57, are located on the motor housing opposite each other. Fig. 58,
illustrates one of the brushes removed for inspection. When the carbon on either brush (B)
is worn to 3/16 in length or if either spring or shunt wire (C) is burned or damaged in any
w a y, replace both brushes. If the brushes are found serviceable af ter removing, reinst all
them in the same position as removed.
Fig. 58
C
B
A
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