Raytheon Beech Baron E55 - Page 75

Raylheon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
TORQUE WRENCHES
When
a
torque
wrench
and
adapter
is
used,
(Ref.
Figure
5)
compensation
must
be made
for the
extra
leverage
gained.
New indicator
readings
must
be
calculated
before
the wrench
is
used.
To
figure
the desired
lower
readings
which
will
actually give
the
torques
specified,
use
the
following
formula:
Original
wrench
length
x
specified
torque
desired
length
of
wrench
adapter
’eading
example:
D
Desired
reading
L
Length
of
torque
wrench
A
Adapter
length
T
Torque
D
L
33 inches
A =11
inches
T
5,000
in.-lbs
33
x
5,000
165,000
3,750
in.-lbs
33
11
44
An
acceptable
method of
checking
the
torque,
ii
a
torque
wrench is
not
available,
(Ref.
Figure
6)
is
to
attach
a
spnr~
scale
to
a
conventional flex
or
"T"
handle inserted
in
an
adapter.
Force should
be
applied
in
a
direction
perpendicular
to
an
imaginary
line
extending
from the
center
of
the
bolt
through
the
spring
scale
attaching
point.
To
calculate
the
force
in
pounds
(scale
reading)
required
to
obtain
the
specified
torque,
divide
the
torque
In
inch-pounds
by
the
distance
in
inches
between the
center
of
the bolt
and the scale
attaching
point.
For
example.
If
the
specified
torque,
is
5,000
inch-pounds
and the
distance
is
25
inches,
a
pull
of
200
pounds
must
be
appi~ed.
Unless
torque
values
are
specified
as
wet
(lubricated),
bolts
to
be
torqued
must
be clean
and free
of
all
lubrtcants,
otherwise loss of
normal friction allowed
for
establishing
the
torque
values
may
result
in
over
torquing
of
the bolt.
When
a
torque
wrench
adapter
is
used,
the
length
of the
adapter
must
be
added to
the
length
of
the
flex
or
’T’
handb
wrench
and
a
value
calculated
for the
particular
combination. The
following
is
a
typical
example
in
finding
a
desired
value.
Effective
length
of flex
or
"T"
Handle wrench...........................12
inches
length
of
adapter........................3
inches
Total
length................................15
inches
Desired
torque
on
bolt...................2,000
in.-lbs
2,000
in.-lbs
133.3
pounds
(scale
reading)
15
inches
E22
SECTION
1
J~Psge
21