Spin Test - Graco ULTRA 1000 Instructions-Parts List Manual

SPIN TEST
ing parts, or electric shock.
For checking armature, motor winding and brush elec-
trical continuity.
setup
Remove the drive housing from the sprayer as des-
cribed in "Drive Housing Replacement". Steps 16,
page
2 9 .
Remove the pressure control cover and screws, the
motor cover, the fan cover (F), and the inspection
covers (J). See Fig 10.
~ ~~~ ~
Disconnect the 'two leads from the motor to the bridge
(308). See Fig 11.
Armature Short Circuit
Test
Quickly turn the motor fen 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 freeiy and resists rotation, the
armature is shorted and the motor must
be
replaced.
See page
30.
Armature, Brushes, end Motor Wiring Open
Circuit Test (Continuity)
lead.
Connect the two black motor leads together with a test
Turn the motor fan by hand at about two revolutions
per second.
If there is uneven or no turning resistance, check the
following:
a)
broken brush springs; b) broken brush
e) broken motor leads; f l loose motor lead terminals.
leads; c) loose brush terminal screws; d) worn brushes;
Repair parts as needed. See page
22.
the motor. See page
3 0 .
If there is still uneven or no turning resistance, replace
Fig 10
Y
Fig 11
..
. . .
,. .
. .
. .
. .,
. ;
..
.
. . .
.. : .
: . ,
,. .:.
. :
,
. . .