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17
Fig. 49
Fig. 50
Fig. 51
BRUSH INSPECTION
AND REPLACEMENT
CAUTION: BEFORE INSPECTING THE BRUSHES,
DISCONNECT THE TOOL FROM THE POWER
SOURCE.
Brush life varies, depending on the load on the motor.
Check the brushes after the first 50 hours of use for a
new machine, or after a new set of brushes has been
installed. After the first check, examine them after about
every 10 hours of use until replacement is necessary. To
inspect the brushes:
1. Remove three screws (A) Fig. 49, and remove motor
cover (B).
2. The brushes are located in the two holders (C) Fig. 50.
Remove spade type terminal connectors (D) and pull out
brush holders (C).
3. Fig. 51 illustrates one of the brushes (E) removed
from the holder (C). When the carbon on either brush (E)
is worn to 3/16″ in length or if either spring (F) or shunt
wire (G) (beneath spring) is burned or damaged in any
way, replace both brushes. If the brushes are found
serviceable after removing, reinstall them in the same
position as removed.
C
D
C
F
A
Fig. 47
Fig. 48
A
F
E
D
G
B
E
G