Service Manual
SERVICE INSTRUCTIONS
SERIAL NOS. 9115105
&
UP
After removing the spool, driver, core and
spring, the drum will slide off the motor
shaft. Install the new drum and reassemble.
5.73
BAD BEARING
-
REPLACE MOTOR OR
TRIMMER
To pin-point
a
defective bearing, inspect
for
a
burned or charred shaft
at
the bearing.
Carefully watch the bearing;
it
should not
spin in
its
casing. Lubricate the bearing
while turning the motor;
a
drop of
30
wt.
oil
may
be
all
that
is
needed to free-up
the motor.
If
the bearing
is
at
fault, re-
place the motor
as
per section 2.1 1, or
replace the trimmer if in warranty.
5.8
CHECK HARNESS CONNECTIONS AT
MOTOR
Visual inspection alone will not suffice.
Try moving the wires
at
the motor connec-
tions; the wires may slip out of the con-
nectors.
5.81
SECURE MOTOR CONNECTIONS
(fig. 5.81)
Secure the loose connections
at
the motor
by recrimping the existing connectors or
installing new ones.
! Note:
use
electrical crimping pliers
only.
Do not use side cutters or wire cutters.
Figure 5.81
5.9 TEST LOWER HARNESS
(fig. 5.9)
With the battery cover off, unplug the
upper to lower harness. Insert one of the
probes of
a
continuity tester into either
of the lower harness leads. Insert the
other tester probe into the proper con-
nector
at
the motor (note lead wire to
color). Check both leads for complete
circuits.
Figure 5.9
REPLACE LOWER HARNESS
To replace lower harness, disconnect the
upper to lower harness. Cut the motor
terminals
at
the factory crimp and pull the
wires out. Pull the harness out of the tube.
Install the new harness. Caution should be
taken
so
that wires are not pinched when
replacing the motor housings.
TEST SWITCH CONNECTIONS
Pull gently on the wires leading into the
switch to be certain of firm connections.
SECURE LOOSE CONNECTIONS
If
any of the wires leading to the switch
are loose, re-install them firmly onto the
switch. If they do not stay
on,
carefully
squeeze the wire terminals with pliers
to close the ears of the terminal.
TEST SWITCH
(figs. 6.1a, 6.1b)
Open the battery
case
as
described in sec-
tion 5.41. Disconnect the wires on the
switch. Connect the -tester leads
as
shown
and activate the switch. There should be
continuity only when the switch
is
de-
pressed.
Figure 6.1a