Instruction manual

12 P1885E/EN 2008-04 86b_1_5 en bedingt.fm, 02.04.2008
Troubleshooting
5
4.4.3 Measuring the torque
We recommend carrying out a static torque measurement by retightening the rundown.
When carrying out a dynamic measurement using a transducer adapter, also carry out a static
test, for example using a torque wrench (electronic).
4.4.4 Pulse frequency
The pulse frequency is set optimally for most applications. For special applications, such as an
extremely hard joint and small torque, the pulse frequency can be increased at the factory, thus
increasing the shut-off accuracy.
5 Troubleshooting
Error Possible causes Measures and remedies
Tool
does not shut off
Torque set too high ¾ Reduce the torque setting, see
4.4.1 Setting the torque, page 10.
Speed set too low
¾ Increase the speed, see 4.4.2
Changing the speed, page 11.
Working pressure < 58 psi (400 kPa)
¾ Check the cross section of the
hose and coupling: Inner
diameter 1/2" (ø 12,5 mm), maxi-
mum length 16.4 ft (5 m).
¾ Increase the working pressure.
Reverse button is
not at the detent
¾ Turn the reverse button
to the detent.
Excessive transmission damping due
to extension and worn socket
¾ Increase the speed, see 4.4.2
Changing the speed, page 11.
¾ Use a shorter or more rigid exten-
sion.
¾ Replace the socket.
Insufficient oil in the pulse unit (no
pulse build-up)
¾ See 6.2 Activating the reserve oil,
page 15.
¾ See 6.2 Activating the reserve oil,
page 15.
Screen in the air inlet tube /
muffler is dirty
¾ Clean or replace parts.
Insufficient shut-off
accuracy
Number of pulses too low: < 6
¾ Reduce speed,
number of pulses > 6.
Adapter parts
¾ Replace adapter parts.
¾ Use extension and socket with
guide diameter.
Pressure fluctuations in the air net-
work
¾ Use a pressure controller.
Fastening time too
long: > 4 seconds
Joint too soft; self-locking nuts, drive
screws
¾ Increase the speed.
¾ Use a pulse nutsetter with a
higher capacity.
¾ Use a mechanical screwdriver.