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~_____~
SPIN
TEST
WARNING
Before doing this procedure, follow the Pressure
the risk of
a
fluid injection injury, splashing fluids
Relief
Procedure Warning on page
17
to reduce
in the eyes or on the skin, injury from moving
Darts. or electric shock.
1
~~~ ~~
For checking armature, motor winding and brush elec
-
trical continuity.
Setup
Remove the drive housing from the sprayer as des
-
cribed in Steps
1
-
9,
page
25.
Remove the pressure control cover and screws, !he
motor cover, the fan cover (F), and the inspectton
covers
IJ).
See Fig
9.
Disconnect the
two
leads from the motor to the bridge
(308).
See
Fig
10.
Armature
Short
Circuit Test
shorts,
the motor will coast
two
or three revolutions
Quickly turn the motor fan by hand.
If
there are
no
before coming to
a
complete stop.
If the motor does not spin freely and resists rotation, the
armature
is
shorted and the motor must be replaced.
See page
29.
Armature, Brushes, and Motor Wiring Open
Circuit Test (Continuity)
Connect the
two
black motor leads together with
a
test
lead.
Turn the motor fan by hand
at
about
two
revolutions
per second.
following:
a)
broken brush springs;
b)
broken brush
If there
is
uneven or no turning resistance, check the
leads;
c) loose brush terminal screws; d) worn brushes;
e)
broken motor leads;
f)
loose
motor lead termlnals.
Repair parts as needed. See page
27.
If there
is
still uneven or no turning resistance, replace
the motor. See page
29.
Fig
9
307
-
671
15