Troubleshooting - Hilti DD 130 Mode D'emploi

9. Troubleshooting

Fault
The tool doesn't start.
Motor runs but the core bit
doesn't rotate.
Rate of drilling progress decreases. Water pressure / water flow rate too
Motor cuts out.
Water does not flow.
Water escapes at the gear housing. Shaft seal / water swivel / extraction
The core bit cannot be inserted in
the chuck.
Water escapes at the chuck.
Excessive play in the drilling
system.
Printed: 08.07.2013 | Doc-Nr: PUB / 5069520 / 000 / 01
Possible cause
Fault in mains supply
Supply cord or plug defective
Switch defective
Gearing defective
high
Core bit defective
Gearing defective
Core bit segments polished
Tool stops running.
Tool has overheated. The motor's
thermal overload protection has been
activated.
Electronics defective
Cooling fan defective
Filter or water flow indicator blocked
head defective
Connection end or chuck dirty or
damaged
Connection end or chuck dirty
Chuck seal defective
Excessive play at the guides
Chain inadequately tensioned
Pivot mechanism loose
Remedy
Plug in another electric appliance
and check whether it works.
The cord should be checked and
replaced if necessary by an
electrical specialist.
The switch should be checked and
replaced if necessary by an
electrical specialist.
The tool should be repaired at a
Hilti service centre.
Regulate the water flow rate at the
side handle.
Check the core bit for damage and
replace it if necessary.
The tool should be repaired at a
Hilti service centre.
Resharpen the core bit on a sharp-
ening plate under water flow.
Guide the tool straight.
Ease the load on the tool and allow
it to run up to full speed by press-
ing the switch several times.
The tool should be repaired at a
Hilti service centre.
The tool should be repaired at a
Hilti service centre.
Remove the filter or water flow
indicator and flush it through.
The tool should be repaired at a
Hilti service centre.
Clean the connection end and
chuck. Replace parts if necessary.
Clean the connection end and
chuck.
Check the seal and replace it if
necessary.
Readjust the guides.
Tension the chain.
Tighten the pivot mechanism
adjusting lever (6.11).
27