Care And Maintenance; Insert Tools And Accessories; Manufacturer's Warranty - Tools - Hilti DD EC-1 Mode D'emploi

Removing the water flow filter
– Use a suitable tool to unscrew the water supply con-
nector from the housing of the tool.
– Use pliers to carefully remove the filter.
– Check the seal for damage and replace it if necessary.
– When reassembling, check that the seal and the fil-
ter are seated correctly.
Procedure in the event of the core bit sticking
The slip clutch will be activated if the core bit sticks. The
power tool must then be switched off by the operator.
To release the core bit, proceed as follows:
Using an open-end wrench to release the core bit
1. Disconnect the supply cord plug from the power out-
let.
2. Grip the core bit close to the connection end with a
suitable open-end wrench and rotate the core bit to
release it.
3. Plug the supply cord back into the power outlet.
4. Continue the drilling operation.
Using the spider wheel to release the core bit (for use
with the drill stand)
1. Disconnect the supply cord plug from the power out-
let.
2. Release the core bit by rotating it with the spider wheel.
3. Plug the supply cord back into the power outlet.
4. Continue the drilling operation.
Transport and storage
Note
– Store and transport the power tool in is toolbox when
possible.
– Open the water flow regulator before storing the pow-
er tool. Especially at temperatures below freezing, take
care to ensure that no water remains in the power tool.

Care and maintenance

Care
The motor housing, the grip moulding and the belt dri-
ve cover are made of impact-resistant plastic. The gear
housing is made of magnesium alloy. The grip cover,
the side handle cover and supply cord sleeve are made
of an elastomer material.
CAUTION
Keep the power tool, especially its grip surfaces, clean
and free from oil and grease. Do not use cleaning agents
which contain silicone.
The outer casing of the tool is made from impactre-
sistant plastic. Sections of the grip are made from a
synthetic rubber material. Never operate the tool when
the ventilation slots are blocked. Clean the ventilation
slots carefully using a dry brush. Do not permit for-
eign objects to enter the interior of the tool. Clean the
8
outside of the tool at regular intervals with a slightly
damp cloth. Do not use a spray, steam pressure clean-
ing equipment or running water for cleaning. This may
negatively affect the electrical safety of the tool.
Clean the chuck frequently with a cloth and lubricate it
at regular intervals with Hilti grease. Remove any dirt
and fragments from the chuck.
Your core bits must also be cared for. Remove any dirt
adhering to their surfaces and protect the surfaces from
corrosion by rubbing the core bits at regular intervals
with an oily cloth. Always keep the connection end clean
and slightly greased.
Remove the filter from the water supply connection on
the tool and flush the filter gauze with water against the
normal flow direction.
If the water flow indicator has become dirty, remove the
parts and clean them with a damp cloth. Do not use abra-
sive agents or sharp objects to clean the sight glass.
This may negatively affect functionality of the water flow
indicator.
Maintenance
Check all external parts of the tool for damage at
regular intervals and check that all operating con-
trols function faultlessly. Do not operate the tool when
parts are damaged or when operating controls do not
function faultlessly. The tool should be repaired at a Hilti
service center.

Insert tools and accessories

For safety reasons and for optimum transmission of the
TOPSPIN action, only DD-C core bits may be used with
the DD EC-1. When drilling using special core bits with
an effective core depth of 24", the hole must be pre-
drilled using a shorter core bit and water collector.
The following accessories are available for use with the
DD EC-1:
– DD-REC 1 water recycling unit
– DD-CB core removal tool
– Drill stand DD-CR1
Manufacturer's warranty – tools
Hilti warrants that the tool supplied is free of defects
in material and workmanship. This warranty is valid so
long as the tool is operated and handled correctly,
cleaned and serviced properly and in accordance with
the Hilti Operating Instructions, and the technical sys-
tem is maintained. This means that only original Hilti
consumables, components and spare parts may be
used in the tool.