Graco 311737G, Important Safety Instructions Manual

Page: 17 / 32

Spin Test
311737G 17
Spin Test
See Wiring Diagram, page 29.
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 28.
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
28.
4. Reattach motor connector (F).
5. Replace drive housing, page 16.
6. Replace shroud (29) and two screws (30).
TIA
29
30
F