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WHITE
FIELD WINDING
BLACK
WIDE BLADE
WIRE
NUT
BRUSH#1
POWER CORD
BLACK
#2
3 N.O.
SPDT SWITCH
BLACK
Circuit Diagram
Trouble Shooting
of brake by qualified ser-
vice person only.
I. Check commutation at no load. If there is a heavy
sparking which foliows the curvature of the commu-
tator: replace the armature.
2. To continue trouble shooting, now unplug the power
cord.
3. Install new brushes,especially
if delayed come-in of
brake has been noticed before failure.
4. Check brake circuit for continuity: remove motor cap
and brushes. Use ohmmeter to check continuity from
brush terminal to brush terminal.
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.
25
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