A
Fig. 47
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.
D
C
Fig. 50
FG
ED
Fig. 48
B
A
Fig. 49
G
FC
E 
Fig. 51
17