Spin Test - Graco ULTIMATE Mx 1095 A Series Owner's Manual

WARNING
ELECTRIC SHOCK HAZARD
Do not touch brushes, leads, springs or
brush holders while the sprayer is
plugged in to reduce risk of electric
shock and serious bodily injury.
WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 7.
For checking armature, motor winding and brush elec-
trical continuity.
Setup
1. Relieve pressure. Remove drive housing. See
page 25.
2. Remove motor shield (54), fan cover (A) and
inspection covers (82). See Fig. 9.
3. Remove pressure control cover (B). Disconnect
motor leads (F) and (G). See Fig. 10.
Armature Short Circuit Test
Relieve pressure. Quickly turn motor fan by hand. If
there are no shorts, the motor will coast two or three
revolutions before coming to a complete stop. If the
motor does not spin freely, the armature is shorted and
the motor must be replaced. See page 27.
54
Fig. 9

Spin Test

A
B
Armature, Brushes, and Motor Wiring Open
Circuit Test (Continuity)
1. Relieve pressure. Connect red and black motor
leads together with a test lead. Turn motor fan by
hand at about two revolutions per second.
2. If there is uneven or no turning resistance, check
following: broken brush springs, brush leads,
motor leads; loose brush terminal screws, motor
lead terminals; worn brushes. Repair parts as
needed. See page 18.
3. If there is still uneven or no turning resistance,
replace motor. See page 27.
F
82
Fig. 10
G