Spin Test
311737B
17
Spin Test
See Wiring Diagram, page 28.
To check armature, motor winding and brush electrical
continuity:
1.
Relieve pressure
, page 8. Disconnect power cord
from outlet.
2.
Remove two screws (30) and shroud (29).
3.
Remove drive housing (5), page 16.
4.
Disconnect motor connector (F).
Armature Short Circuit Test
Quickly turn motor fan by hand. If motor coasts two or
three revolutions before complete stop, there are no
electrical shorts. If motor does not spin freely, armature
is shorted. Replace motor, page 27.
Armature, Brushes, and Motor Wiring Open
Circuit Test (Continuity)
1.
Connect red and black motor leads with test lead.
Turn motor fan by hand at about two revolutions per
second.
2.
If uneven or no resistance, check for missing brush
caps, broken brush springs, brush leads, and worn
brushes. Repair as needed, page 19.
3.
If still uneven or no resistance, replace motor, page
27.
4.
Reattach motor connector (F).
5.
Replace drive housing, page 16.
6.
Replace shroud (29) and two screws (30).
TIA
29
30
F
Summary of Contents for 390 253958
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