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3.6
Do not overload the system. Operate the equipment within its specified power range. The
motor units or other system parts are covered by warranty only when used in the system
combinations listed in the operating instructions.
3.7
Do not use the equipment for purposes and applications for which it was not designed.
3.8
Wear suitable clothing. Do not wear loose clothing or jewellery which could become caught
in moving parts of the machinery. Wear a helmet, protective goggles, protective gloves,
safety shoes, ear protectors and a hair net if you have long hair.
3.9
When unplugging, pull the plug and not the cable. Do not carry or transport the motor units
by the hydraulic hoses. Protect the hydraulic hoses from sharp edges.
3.10 Avoid body positions in which the back is bent when carrying motor units and other heavy
parts. Maintain a secure stance and always stay in balance, especially when using ladders.
3.11 Care and maintenance of the system is necessary to ensure safe and trouble-free opera-
tion. Follow the maintenance instructions. Keep the grips dry and free of oil and grease.
3.12 Disconnect the electric extension cable from the mains supply when the equipment is not
in use, during transport and before inspection or maintenance of the hydraulic unit. When
changing core bits, or when dismantling the equipment, always ensure that the hydraulic
unit is switched off and that the switch lever (I-O) at the DD-750 HY motor unit is in the OFF
position.
3.13 Do not leave tools in position on the equipment (e.g. open-end wrench on nut). Check that
all wrenches and setting-up tools have been removed before switching on the hydraulic unit
and motor unit.
3.14 Use only approved and correspondingly marked electric extension cables. The overall
length of the electric cable used must be taken into account, and the appropriate cable
cross section (cable diameter) determined accordingly. Electric extension cables should not
be coiled on a drum while the equipment is in operation.
3.15 Stay alert and carefully observe the progress of your work. Proceed logically and do not use
the system and tools when your full concentration is not on the job.
3.16 Check the system, motor units, parts, electric cables and hydraulic hoses for damage and
correct operation before use. Check that all parts have been assembled correctly and con-
sider all other factors which could influence operation of the equipment. Contact your Hilti
representative or Hilti service centre if faults or deficiencies are found. Repairs to electrical
parts must be made by a qualified electrical specialist.
3.17 The electrical and mechanical safety of the diamond drilling system together with acces-
sories such as electric extension cables must be checked at regular intervals in accord ance
with national regulations.
The checks applicable to the earth / ground conductor of the hydraulic unit and the electric
extension cable leading to the unit are particularly important.
3.18 Measures for securing and transporting the cores and concrete blocks that have been cut
out must be planned and implemented. Keep the working area clean and tidy and cordon
off openings and holes where there may be a risk of falling.
3.19 Working on materials that present a health risk is not permissible.
3.20 Transportation of the machine, or parts of it, by suspending from a crane is prohibited.
3.21 The machine, or parts of it (especially the hydraulic couplings), may get hot during use. Wear
protective gloves.
3.22
Before beginning work, check the working area (e.g. using a metal detector) to ensure
that no concealed electric cables or gas and water pipes are present
. External metal
parts of the machine may become live, for example, when an electric cable is damaged ac-
cidentally. This presents a serious risk of electric shock.
Safety instructions
Printed: 22.10.2015 | Doc-Nr: PUB / 5128296 / 000 / 02
