Document number: ED.03783.00.001.ENG rev 4 Page 19 of 153
2.4 Welding work
• Welding, cutting and grinding work on the System is only permitted with the prior written
consent of Enerpac.
• Welders must be properly qualified and must have a valid welding certificate.
• If welding work needs to be performed on the System then
o Switch the machine off
o Disconnect all power cables and communications cables
o Connect the system to a direct earth line.
2.5 Working on the electrical system
• In the event of an electrical fault in the electric control system, you must bring all connected
devices into a safe condition. Switch off the System.
• Work on the electrical system must be performed by a competent, qualified electrician or by
trained personnel under the direct supervision of a qualified electrician, in compliance with
all applicable rules and regulations such as
o Ref 1 “Operation of electrical installations - Low voltage”
o Ref 2 “Operation of electrical installations”.
• Switch the power off before inspection, maintenance or repair of the System.
Make sure that there is no power on the relevant parts. If necessary, connect the machine to
earth. Insulate any adjacent component that is still under voltage.
• Check and inspect the electrical system of the System at regular intervals.
Problems, such as loose connections and damaged or stuck wiring, must be resolved
immediately. Only use original fuses and circuit breakers with the correct current value.
• If work does need to be performed on components which are under voltage, then cordon off
the work zone and only use certified and properly insulated tools.
2.6 Working on the hydraulic system
• Work on the hydraulics system or other components in a pressurized system must be
performed by a competent, qualified installer or by trained personnel under the direct
supervision of a qualified installer, in compliance with all applicable rules and regulations.
• Check all pipes, hoses, quick-release couplings and screw joints regularly for leaks and
visible external damage. Repair damage immediately. Pressurized hydraulic fluid leaks may
cause serious injury, and it may cause fire and damage to the environment.
• If parts need to be removed from the hydraulic system, the hydraulic pressure must be
released according to the instructions in this manual before beginning work.
• Expand and install pressurized hydraulic pipes, tubes and lines in accordance with
professional standards.
• Make sure that no parts have been switched during re-installation work. All parts and the
length and quality of hoses meet the requirements of Ref 3 “General rules and safety
requirements for systems and their components”.
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