Protective Equipment; Preparation And Installation; Development And Research; Installation And Assembly - Kramp MPP Manuel D'utilisation

3.7

Protective equipment

Wearing the following personal protective equipment is mandatory:
• Face mask or safety goggles,
• Hearing protection: sound level > 85 dB(A),
• Safety shoes.
4.0

Preparation and installation

4.1

Development and research

You may ask yourself in advance, before the power pack including components and peripheral equipment are installed:
Where and how should the components be installed?
This depends on the following factors:
• Installation of the power pack and the components requiring intensive maintenance should be done in such a location
that subsequent inspection and maintenance can reasonably be performed. After all, no system is free of maintenance or
inspection.
• External temperature influences. Obviously, high ambient temperatures significantly reduce heat emission to the
environment. However, low temperatures also require extra attention. The ideal temperature is between 38 and 50°C,
with 60 to 68°C as a maximum. At higher temperatures, the life span of the oil and the components decreases sharply.
• Sound transmission/noise pollution. The following aspects require attention: units, motors and possibly cylinders should
be fitted with damping rubbers. In addition, tubes and pipes should be fitted with the appropriate pipe brackets and, if
necessary, accumulators should be installed to absorb pressure waves.
Good consultation in advance and knowledge of the expectations of the end user or machine operator concerning a new
machine, saves a lot of trouble, distress and money afterwards.
4.2

Installation and assembly

Always follow the instructions of the manufacturer or supplier when assembling the components, couplings, tubes and pipes.
During installation and assembly, keep the following three rules regarding cleanliness in mind:
1. Tubes, couplings and pipes are never clean on the inside once they have been treated and should always be cleaned before
installation by rinsing, blowing through using lint-free paper or cotton that is soaked in oil or paraffin or using special
equipment. The cleaning process should be repeated until all elements are completely free of impurities. To remove slag
and loose material, hot-bent or welded pipes must be treated with hydrochloric acid, rinsed with copious amounts of
water at high speed, followed by hot water to dry out the pipes and finally with oil or paraffin to protect against corrosion.
Prefabricated tubes, couplings and pipes that are awaiting assembly must be plugged and protected against corrosion,
moisture and dust. The same applies to the bright elements and components of the unit.
2. Keep the workplace clean during installation and assembly; otherwise, the system to be started up will be contaminated.
Moreover, a clean workplace is safer and more pleasant to work in. Use the proper tools and ensure that they are clean.
3. Oil used for the assembly of components must be clean. Oil straight from a drum is not clean enough and may even
contain water as a result of condensation during storage!
As is the case with every hydraulic system, rigorous attention to cleanliness and proper oil filtration is the key to successful
functioning and a long life span. Failure to follow the above-mentioned rules will result in pump, valve and component
malfunctioning and may cause serious damage and eventually lead to system failure.
4.3

Dimensioning of tubes and pipes

Selecting tubes and pipes with the correct diameter minimises system pressure drops. The greater the resistance, the
greater the operational loss. It is essential to avoid factors that cause pressure drop, e.g. square screw couplings. The use
of 'smooth bends' where necessary is recommended. If the pipes are very long or the oil speed is high, it is sensible to select
pipes with a larger diameter. Please note: pipe diameter indications refer to the external diameter!
Use a flow chart when determining the correct dimensions. Solid-drawn precision steel pipes in accordance with DIN
2445/2-1974 must be used for pipework. Depending on the operating pressure, tubes with double steel braid reinforcement
in accordance with DIN 20022/EN853, tubes with quadruple steel braid reinforcement in accordance with DIN 20023/EN856
or plastic tubes in accordance with SAE standards can be used. Always ensure that both tubes and pipes are assembled in
a tension-free manner and avoid mechanical damage as a result of crossing pipes and tubes or incorrectly mounted fixing
brackets. Do not spray dye or paint on tubes and keep them away from external chemical influences and heat sources.
4.4

Installation and assembly personnel

Installation and assembly must be carried out by expert personnel with professional training. They should be aware that they
bear great responsibility, particularly with respect to safety. Incorrectly mounted cutting rings, tubes, etc., may result in life
threatening situations.
The machine engineer should be aware of the fact that a CE statement must be supplied with the machine in which he
declares himself fully liable for it and indicates how it should be used.
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