Piper Cherokee Six - Page 579

PIPER
CHEROKEE
SIX SERVICE
MANUAL
10-32.
CHECKING
ALTERNATOR
BELT
TENSION.
If
properly
installed,
tensioned
and
checked
periodically,
the generator
drive
belt will
give
very
satisfactory
service.
However,
an
improperly
tensioned
belt
will
wear
rapidly
and
may
slip
and reduce
generator
output.
Consequently,
a
belt
should
be
checked
for
proper
tension
at the
time
it is
installed,
again
after
25 hours
operation
and
each
100
hour
inspection
thereafter.
The
method
for
checking
alternator
belt
tension
is described
below:
Torque
method:
This
method
of checking
belt
tension
consists
of
measuring
torque
required
to
slip the
belt
at
the small
pulley
and
is accomplished
as follows:
a.
Apply
a
torque
indicating
wrench
to
the
nut
that
attaches
the
pulley
to
the
generator
and turn
it
in a
clockwise
direction.
Observe
the
torque
shown
on the
wrench
at
the instant
the pulley
slips.
b.
Check
the
torque
indicated
in step
(a) with
torque
specified
in
the
following
chart.
Adjust
belt
tension
accordingly.
Width of Belt
3/8
inch
3/8 inch
1/2
inch
1/2 inch
Condition
Torque
indicated
at
generator
pulley
New
Used
New
Used
11 to
13
ft.
lbs.
7 to
9 ft.
lbs.
13 to
15 ft.
lbs.
9
to
11
ft.
lbs.
NOTE
The
higher
tension
specified
for
a new
belt
is to
compensate
for
the
initial
stretch
that
takes
place
as soon
as it
is
operated.
These
higher
tension
values
should
not
be
applied
to belts
which
previously
have
been
used.
ELECTRICAL
SYSTEM
Revised: 8/14/73
3C3