Spin Test - Graco DURON Performance Max 395 Repair Manual

Setup
Electric Shock Hazard; page 5.
To check armature, motor winding and brush electrical
continuity:
1.
Relieve pressure; page 5.
2. Remove drive housing; page 19.
3. Fig. 4. Remove pressure control cover (50). Dis-
connect connector (F).
4. Fig. 5. Remove motor shroud (23) and inspection
covers (A).
Armature Short Circuit Test
Quickly turn motor fan by hand. If no electrical shorts,
motor coasts two or three revolutions before complete
stop. If motor does not spin freely, armature is
shorted. Replace motor; page 20.
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Spin Test

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: broken brush
springs, brush leads, motor leads; loose brush
terminal screws, motor lead terminals; worn
brushes. Repair as needed; page 13.
3. If still uneven or no resistance, replace motor;
page 20.
50
Fig. 4
F
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