30
Solution / measures
– Install additional guide pulleys.
– Reduce the wire tension by adjust-
ing the saw head advance. Don’t
exceed the specified pressure of
120–160 bar in the main hydraulic
circuit.
– Fit shorter wire couplings.
– Use the cardan-type, flexible cou-
plings recommended by Hilti.
– Check the setting of the crimping
pliers.
– Use
Hilti
crimping pliers with a
minimum pressure of
7 t.
– Check the crimping jaws and
replace if necessary.
– With all couplings available
from Hilti, the wire must always
be pushed in as far as it will
go.
– Reduce the wire tension by adjust-
ing the saw head advance.
– Increase wire tension by adjusting
the saw head advance.
– Install additional guide pulley
stands.
– Fit a shorter diamond wire.
– The front rail support (at the wire
distributor) should be fitted as
close as possible to the end of the
rail.
Problem
4
. The wire breaks immediately
beside the coupling
5
. The diamond wire is pulled out of
the crimped coupling.
6
. The diamond wire thrashes about
and vibrates badly.
Possible cause
– The cutting radius of the diamond
wire in the concrete is too small.
– The wire has been used too long
under excessive tension.
– The wire coupling is too long.
– Crimping pliers incorrectly adjusted
– Insufficient pressure applied to the
crimping pliers
– Incorrect or worn crimping jaws
– The wire was not pushed far
enough into the coupling.
– Constantly excessive wire tension
during operation.
– Insufficient wire tension
– The pulley stands are too far apart
(excessively long unsupported wire
length).
– Rail support incorrectly positioned
12. Troubleshooting
Printed: 08.07.2013 | Doc-Nr: PUB / 5069762 / 000 / 01
