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309067 9
Motor Test
Relieve pressure; page 3.
For checking armature, motor winding and brush
electrical continuity.
Setup
1. Unplug sprayer.
2. Remove drive housing. See page 15. This ensures
that any resistance noticed in armature test is due
to motor and not to worn gears in drive housing.
3. Fig. 3. Remove brush inspection covers (A).
4. Fig.4. Remove screws (25, 26). Lower control
board (22a). Disconnect two leads (C) from motor
to board.
A
B
Fig. 3
02991
Armature Short Circuit Test
1. Remove fan cover (B). See Fig.3.
2. Spin motor fan by hand. If there are no shorts,
motor coasts two or three revolutions before
coming to complete stop. If motor does not spin
freely, armature is shorted and motor must be
replaced. See page 12.
Armature, Brushes, and Motor Wiring
Open Circuit Test (Continuity)
1. Fig. 4 Connect red and black motor leads (C)
together with a test lead. Turn motor fan by hand
at about two revolutions per second.
80
green
with yellow
stripe
8386A
Fig. 4
77
67
30
78
C
22a
96
D
E
black
green
white
black red
yellow
107
108
232910 – 232913, 232916, 232917
232918, 232915, 232919, 232914, 232665
77
67
116
78
C
22a
D
E
black
white
black red
yellow
107
108
8385A
96
119
blue
brown
80
brown
2. If uneven or no resistance, check for: broken brush
springs, brush leads, motor leads; loose brush
terminal screws or motor lead terminals; worn
brushes. See page 10.
3. If still uneven or no resistance, replace motor;
page 12.