Stahlwille Manoskop 730N User manual

25
STAHLWILLE
Service Manoskop®
730N
Technical description
The Manoskop®730N is an adjustable
torque wrench with cut-out function,
audible and tactile cut-out signals.
•The torque wrench has a safety cut-
out mechanism.
•The cut-out level can be very quickly
and precisely set with little physical
effort by means of a setting knob.
•The required value is secured by
means of a fail-safe mechanism on
the control knob.
•The measuring element is a flexible
rod. The rod is not pre-tensioned and
therefore only under tension from
start to finish of the actual tightening
operation. After use it is not
necessary to reset to the lowest
value.
•As soon as the torque wrench is
released, it is ready for the next job.
•The ergonomically-shaped two-
component handle allows for
comfortable and safe operation. The
correct grip is indicated optically and
tactually.
List of contents
Technical description ................. 25
ãImportant safety points .......... 28
Operation ................................... 29
Maintenance............................... 40
Cleaning the Manoskop®........... 46
Accessories................................ 46
Disposal ..................................... 47

26
•The QuickRelease mechanism allows
for a quick changeover of insert tools.
•The wrenches can only be tightened
in one direction. Counter-clockwise
tightening is possible with the wrench
turned over.
The correct direction of tightening is
indicated by an arrow on the grip.
•If necessary, these torque wrenches
can be readjusted without
dismantling.
The maximum permitted deviation from
the currently set loosening value is ± 3 %.
The Manoskop®730N complies with DIN
EN ISO 6789, Type II, Class A.
Every Manoskop®has a unique serial
number and is supplied with a works
calibration certificate.
Service Manoskop®730N ...
... can be fitted with various insert tools.
For this purpose, the head of the wrench
has a recessed square drive at the face
(sizes are shown in the Technical
Specifications on page 27) with a double-
sided locating hole and insertion groove.
The insert tools can be attached in the
„normal“ position or rotated through 180°.
Controlled counter clockwise tightening is
also possible.

27
Table of technical specifications
No Range Main scale graduation Fine scale graduation Insertable square
drive [mm]
Length
[mm]
Weight
[g]
[N m] [ft.lb] [in.lb] [N m] [ft.lb] [in.lb]
730N/5 10 – 50 7 – 37 – 5 1 – 0,25 N m 9 x 12 330 825
730N a/5 – 7 – 37 90 – 450 – 1 50 2,5 in.lb 9 x 12 330 825
730N/10 20 – 100 15 – 75 – 10 2,5 – 0,5 N m 9 x 12 386 980
730N a/10 – 15 – 75 180 – 900 – 2,5 100 5 in.lb 9 x 12 386 980
730N/12 25 – 130 20 – 95 – 10 2,5 – 0,5 N m 14 x 18 421 1120
730N/20 40 – 200 30 – 150 – 10 5 – 1 N m 14 x 18 467 1260
730N a/20 – 30 – 150 350 – 1800 – 5 100 10 in.lb 14 x 18 467 1260
730N/40 80 – 400 60 – 300 – 20 10 – 2 N m 14 x 18 607 1660
730N a/40 – 60 – 300 800 – 3600 – 20 100 2 ft.lb 14 x 18 607 1660
730N/65 130 – 650 100 – 480 – 50 20 – 2,5 N m 14 x 18 890 3300

28
Intended Purpose
The Manoskop®730N has been
developed for the controlled tightening of
screw joints in a workshop environment.
In order to loosen a nut or bolt during the
normal tightening process, the
Manoskop®can also be used in the
opposite direction. The Manoskop®730N
may only be used for these purposes. To
do so, the correct attachments must be
used with the torque wrench.
The „intended purpose“ includes full
adherence to the information contained in
this instruction booklet, in particular the
safety instructions and technical tolerance
limits. The buyer is required to ensure that
all users comply with these instructions.
Any use beyond the use described here is
in breach of the intended purpose.
The buyer and user are responsible for
any damage or injury resulting from non-
adherence to these instructions.
•The Manoskop®may not be used for
uncontrolled loosening of nuts & bolts
—for example rusty joints. This may
cause damage to the torque wrench.
•The Manoskop®may not be used as
ahammer. This will lead to injury and
damage.
ãImportant safety
points

29
Correct torque settings ...
... can be lifesaving in some applications.
For this reason, please note the following
points:
Unless otherwise indicated in the user's
internal regulations (e.g. test equipment
inspection to ISO 9000 et seq), an
inspection must take place after approx.
5000 operations or every 12 months,
whichever is the shorter. The time frame
(12 months) starts with the first usage.
If an inspection shows that there is
excessive deviation, the torque wrench
will have to be readjusted (see page 43).
Additional important safety
points ...
... may apply depending on the
application. These are found in the
appropriate sections marked with danger
symbols ã.
Operation
The Manoskop®730N is a measuring
instrument and must be treated with the
utmost care. Avoid subjecting the tool to
physical knocks, chemicals or excessive
temperatures beyond the limits given in
these instructions.
ãCAUTION !
In order to ensure the
cut-out is working
accurately, it should be
checked at regular
intervals.

30
Please note that extremes of climate
(cold, heat, humidity) may affect
measuring accuracy.
Avoid overloading the tool by more than
30% of the maximum permissible load in
the direction of tightening or in the
opposite direction. The Manoskop®may
be damaged. After such an overload, the
readings may be inaccurate in such a way
that the user does not notice.
Selecting the inserts and
insert tools
ãCAUTION !
When using inserts on
torque wrenches with a
square drive, ensure
they have been
manufactured to comply
with standards and are
the correct shape and
size for the nut or bolt to
be tightened.
STAHLWILLE inserts
guarantee the
connection will be a
good fit and that the
drive profile will fit
exactly.

31
These posess the requisite size fitting in
all joint areas and have the required raw
material tensile strength.
The calculation for correcting the set
values and the extension adjustment size
can be found in the STAHLWILLE
catalogue.
ãCAUTION !
Please use only insert
tools made by
STAHLWILLE.
ãDANGER !
Check the extension
adjustment size for the
insert tool being used!
If the extension
adjustment size deviates
from the standard
adjustment, then a
correction of the set
value is required.
Otherwise incorrectly-
tightened bolts could
lead to damage to
persons or property.
ãCAUTION !
Ensure the maximum
permissible load of the
insert or tool used is not
exceeded. This might be
lower than the maximum
cut-out torque of the
torque wrench.

32
Remember that the tool has to be of the
correct type and the right size for the
screw or bolt.
ãCAUTION !
Use of home-made
special tools may be
dangerous. If you need
to manufacture your own
tools, please contact
STAHLWILLE first.
ãDANGER !
When using insert tools,
ensure that the locking
pin has located correctly.
Otherwise, there is a
danger of injury or
damage.

33
Attaching insert tools
1. Insert the insert tool into the internal
square drive on the face of the head
of the wrench.
2. The spring-loaded locking pin of the
QuickRelease safety lock of the insert
tool is depressed by the insertion
groove. Slide the insert tool further
until it stops. Ensure that the locking
pin engages in the locating hole.
3. Check to see that the insert tool is
properly attached.
4. To tighten counter clockwise, turn the
insert tool through 180° before
attaching to the torque wrench.

34
5. If you are using a ratchet insert tool,
set this to the desired direction by
turning the control knob.
Removing insert tools
1. If the tool was attached in the
"normal" position, press the
QuickRelease button on the
underside of the wrench head (A).
2. If the tool was attached to the torque
wrench rotated through 180°, insert a
fine punch into the locating hole on
the upper side of the wrench head.
Depress the locking pin with the
punch (A).
3. Remove the insert tool (B).

35
Setting the torque level
The range of measurement and units of
measure can be found on the type plate
and in the tables. For ease of
differentiation they are shown in two
colours. Torque levels indicated in the
measurement area shown in black are set
using the black main and fine scales. The
level indicated on the fine scale refers
solely to the black graduations on the
main scale.
Torque levels indicated in the
measurement area shown in green are
only ever set on the main scale.
Setting torque levels using the black
graduations
The cut-off levels are set by turning the
control knob. Here you must always
assume that the level is lower than that
desired.
1. Pull the control knob out of the locking
position until it engages (A).
2. Turn the control knob (B) and check
the graduation on the black main
scale.
3. Set a value which lies below the
desired level. Example: Manoskop®
730N/10. Desired level 62,5 N m.
First set the level to around 60 N m:

36
4. Turn the control knob and check the
exact setting on the fine scale.
Example: Manoskop®730N/10: For a
desired setting of 62,5 N m, set the
level to 2,5 N m.
5. Check the correct setting again.
6. When you have set the desired value,
press the control knob back into the
locking position. The knob engages in
the notch and you hear a click. The
setting is locked in.
7. The torque wrench is now ready to
use.

37
Setting torque levels using the
green scale
1. Pull the control knob out of the locking
position until it engages (A).
2. Turn the control knob (B) and check
the green main scale.
3. Firstly set a value which lies under the
desired setting.
4. Set the desired value. Example:
Manoskop®730N/10: 52,5 ft.lb.
At this setting you can disregard the
values on the fine scale.
5. Check the correct setting again.
6. When you have set the desired value,
press the control knob back into the
locking position. The knob engages in
the notch with a click. The setting is
locked in.
7. The torque wrench is now ready for
use.

38
Controlled counter
clockwise tightening
For reasons of accuracy, these torque
wrenches have been designed to work in
only one direction. The direction is
marked with an arrow.
Controlled counter clockwise tightening is
possible by turning the Manoskop®over.
For controlled counter clockwise
tightening using the Manoskop®730N the
insert tool has to be rotated through 180°.
Ratchet insert tools also need switching to
„L“ (CCW) for the correct tightening
direction.
Uncontrolled loosening of
nuts & bolts ...
... opposite to the tightening direction is
possible. The cut-out mechanism is not
placed under load during this process.
ãCAUTION !
Important! Never exceed
alimit of 130% of the
maximum scale reading.
Do not use the tool for
loosening rusty nuts and
bolts. This may cause
damage to the torque
wrench. After such an
overload, the readings
may be inaccurate in
such a way that the user
does not notice.

39
Using the torque wrench
Only use the Manoskop®by the handle.
Hold the handle only in the middle. Apply
force at a tangent to the swivel radius and
at right angles to the axis of tightening.
Pull steadily and without any interruption,
particularly during the final phase, until
you feel a jerk and hear a click. The torque
level set on the scale has now been
reached.
ãDANGER !
Before you use the
wrench, check that the
cut-out value is set to
the correct level and that
the insert tool is firmly in
place. Apply the tool in
such a way that it cannot
slip off the nut or bolt.
Otherwise, there is a
danger of injury or
damage.

40
As soon as the torque wrench has cut out,
it is ready for the next job.
Maintenance
The internal mechanisms of the torque
wrench are subject to normal wear and
tear under operating conditions. For this
reason, the accuracy of the cut-out should
be checked at regular intervals.
Unless otherwise indicated in the user's
internal regulations (e.g. test equipment
inspection to ISO 9000 et seq), an
inspection must take place after approx.
5000 operations or every 12 months,
whichever is the shorter. The time frame
(12 months) starts with the first usage.
If inspection shows that there is a
deviation, the torque wrench must be
adjusted.
The inspection and adjustment must be
carried out in accordance with
DIN EN ISO 6789.
ãCAUTION !
Important! Once the
wrench has cut out,
never apply more
pressure! You should
therefore not pull too
fast in case you cannot
stop the motion quickly
enough when you hear
the click.

41
Checking the accuracy of
the cut-out value
Atorque tester of sufficient capacity and
accuracy is required for the inspection.
If you have access to such a tester, you
may inspect the Manoskop®yourself.
Suitable torque testers are available from
STAHLWILLE. It is also possible for
STAHLWILLE to test the Manoskop®for
you.
Here, we demonstrate the inspection
using the Manoskop®730N/10.
To carry out the test, proceed as follows:
1. Set the torque wrench to the highest
scale reading
2. Operate the torque wrench five times
ensuring it cuts out properly each time
Important note on the accuracy of the
readings:
3. Set the torque wrench to 20% of the
maximum scale reading.
ãCAUTION !
Once the wrench has cut
out, never apply more
pressure! You should
therefore not pull too
fast in case you cannot
stop the motion quickly
enough when you hear
the click.

42
4. Operate the torque wrench five times
on the torque tester. Check to see
that the readings shown on the torque
tester are not more than 3.09 %
greater and not more than 2.91 %
smaller than the value set on the
torque wrench.
5. Set the torque wrench to 60 % of the
maximum scale reading.
6. Operate the torque wrench five times
on the torque tester. Check to see
that the readings shown on the torque
tester are not more than 3.09 %
greater and not more than 2.91 %
smaller than the value set on the
torque wrench.
7. Set the torque wrench to the highest
scale reading.
8. At this setting, operate the torque
wrench five times on the torque
tester. Check to see that the readings
shown on the torque tester are not
more than 3.09 % greater and not
more than 2.91 % smaller than the
value set on the torque wrench.
If the tests show that there are deviations
greater than the permitted amounts, the
wrench will require readjusting.

43
Adjusting for deviations in
cut-out value
You may return your torque wrench to
STAHLWILLE for adjustment. You will
then receive the tool back with a new
works calibration certificate.
You may adjust the torque wrench
yourself. In this case, however,
STAHLWILLE‘s accuracy guarantee is
void.
Atorque tester of sufficient capacity and
accuracy is required for making
readjustments.
Every Manoskop®has two adjusting
screws inside for readjustment purposes.
These are accessible with an Allen key,
size 2 mm, through two holes in the
housing.
The adjusting screw, which lies nearer to
the control knob, is primarily for adjusting
the lower end of the scale.

44
The screw which is closest to the head is
primarily for adjusting the upper end of the
scale range.
Each screw has a minor effect on the
adjusting range of the other screw.
To protect the mechanisms from dirt,
these two holes are plugged.
To adjust the wrench, you will need the
torque tester and an Allen key, size 2 mm.
Proceed as follows:
1. Remove both plugs using a sharp
implement. Retain the plugs.
2. To adjust the lower end of the scale,
insert the Allen key in the hole nearer
to the control knob. To adjust the
upper end of the scale, insert the
Allen key in the other hole.