Spin Test - Graco 231–373 Instructions-Parts List Manual

WARNING
ELECTRIC SHOCK HAZARD
Do not touch the brushes, leads, springs
or brush holders while the sprayer is
plugged in to reduce the risk of electric
shock and serious bodily injury.
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
follow the illustrated Pressure Relief
Procedure warning on page 13 when-
ever you are instructed to relieve pressure.
For checking armature, motor winding and brush electri-
cal continuity.
Setup
Relieve pressure. Remove the drive housing. See page
26.
Remove the motor shield (59), the fan cover (F) and the
inspection covers (J). See Fig. 9.
Remove the pressure control/cover(301). Disconnect
the – and + leads from the motor to the pressure control/
cover terminals M–, and M+. See Fig. 10.
Armature Short Circuit Test
Relieve pressure. Quickly turn the motor fan by hand. If
there are no shorts, the motor will coast two or three revo-
Fig. 10

Spin Test

301
M+
lutions before coming to a complete stop. If the motor
does not spin freely, the armature is shorted and the mo-
tor must be replaced. See page 28.
59
Fig. 9
Armature, Brushes, and Motor Wiring Open
Circuit Test (Continuity)
Relieve pressure. Connect the two black motor leads to-
gether with a test lead. T urn the motor fan by hand at
about two revolutions per second.
If there is uneven or no turning resistance, check the fol-
lowing: broken brush springs, brush leads, motor leads;
loose brush terminal screws, motor lead terminals; worn
brushes. Repair parts as needed. See page 20.
If there is still uneven or no turning resistance, replace the
motor. See page 28.
M–
–
+
F
J