27
Wiring Diagram
Trouble Shooting of Brake by Qualified
Service Person Only
1. Check commutation at no load. If there is a heavy
sparking which follows the curvature of the commuta-
tor: replace the armature.
2. To continue trouble shooting, now unplug the power
cord.
3. Install service brushes, especially if delayed come-in of
brake has been noticed before failure.
4. Check brake circuit for continuity: remove brush caps
and brushes. Use ohmmeter to check continuity from
brass brush holder to brush holder. If open, locate
exact place using ohmmeter. As indicated by test,
tighten connection or replace field assembly or replace
switch.
5. After repair, check direction of blade rotation vs. guard
arrow.
White
White
Field
Lead
Black
Gray Brake Lead
N.C.
Brush
Brush
Armature
Red
Red
Brush
Lead
White
Brush
N.O.
Switch
Lead
Cord w/Plug
Connector
Summary of Contents for ms12500
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