Power Train
Testing And Adjusting
Wear eye protection when seating, polishing or
cleaning the motor with air pressure. During the
seating and polishing procedure, keep fingers
away from components in rotation. For prevention
of injury to fingers, do not use a commutator
cleaner or brush seater stone that is shorter than
63.5 mm (2.50 in.).
Brush Seating
(3) ZLX Ð0036 Brush seater stone.
9.
Put ZLXÐ0036 Brush Seater Stone (3) on the
commutator and operate the motor at a slow
speed.
NOTICE
Do not let stone (3) stay in contact with the commutator
bar too long. This causes more wear than is necessary
to the brushes and the commutator.
10.
Move stone (3) across the commutator at the
backe edge of the brushes for a short time. This
will take the shiny finish off the commutator and
seat the new brushes.
11.
Turn the key switch to the OFF position and
disconnect the batteries. Check the contact
surface of each brush. At least 85% of the brush
contact surface of each brush must show wear. If
necessary, do Steps 8 through 11 again until the
correct wear can be seen on the brush contact
surface.
NOTICE
Never use air pressure that is more than 205 kPa (30
psi). Make sure the line is equipped with a water filter.
12.
After the brushes have the correct seat contact
surface, operate the motor at slow speed. Use
compressed (pressure) air to remove all dust and
abrasive grit.
Armature Tests
Test For Short Circuit
Short Circuit Test
(1) Growler. (2) Armature. (3) Hacksaw blade.
(4) Green light. (5) Red light.
1.
Put armature windings (2) in the jaws of growler.
(3).
2.
Turn the growler (1) on. Slowly turn the growler on
the armature (2) while a hacksaw blade (3) is held
over the windings.
3.
If the windings are shorted, the green light (4) will
be on. The red light (5) will be on if the windings
do not have a short.
The odor of burned insulation from the drive motor
while it is in operation is an indication of a short in
the armature.
Tools Needed
Digital Multimeter Or Equivalent
1
Growler Tester
1
WARNING
15
3
5
3
2
4
1
