Service Manual

SERVICE INSTRUCTIONS
5.5 CHARGE BATTERY FOR 48 HOURS AND
TEST
(fig. 5.5)
To test the Power Pack, the battery must
be in place and connected inside the trim-
mer. Connect
a voltmeter (set for a 10
V.D.C.
test) to the battery wiring harness;
large terminal
is positive, small is negative.
With the trimmer cutting head in
a safe
position, squeeze the trigger and read the
voltmeter
scale. A reading below 6 volts
means that the battery
is defective and
should be replaced.
I
Figure 5.5
5.51 REPLACE BATTERY AND CHARGE FOR
48 HOURS
After removing the battery as outlined in
section 5.41 (steps A,
C, D, E), install
the new battery in reverse order.
DON’T FORGET: Charge the new battery
for
48 hours before putting it to use!
5.6 INSPECT MOTOR
Remove all the screws that hold the hous-
ings together. Gently separate the two
halves and inspect the motor for charred
or broken wires,
etc.
5.61 REPLACE MOTOR (fig. 5.61)
When replacing the motor
it is necessary
to remove the automatic line feed assem-
bly. Refer to section
1 for head disassem-
bly.
To remove the wire connectors, use
wire cutters and nip the connector in the
center of the factory crimp; now pull the
wires out.
28
Figure 5.61
5.7 SPIN MOTOR BY HAND
Spin the motor with your hand and notice
the feel of the armature;
it should turn
freely. Visually check for excessive com-
mutator wear, armature end-play and bear-
ing to shaft fit. A binding or scraping sound
when the motor
is turned could be ev-
idence of a bad bearing or a deformed
drum.
5.71 CHECK DRUM (fig. 5.71)
A deformed drum means that plastic de-
formation has occurred to the drum
at the
motor shaft. The drum may have slipped
up the motor shaft.
A tell-tale sign would
be the
spool not located inside the drum
correctly. When the drum
is deformed
it must be replaced.
--
Figure 5.71
5.72 REPLACE DRUM
SERIAL NOS. 800001-91 15104
After removing the spool, driver, core and
spring
as described in section 1, pry the
spool off the shaft. Note that the motor
shaft has
a flat side to line up inside the
drum.