Supply Of Parts; Malfunctions; Installation Produces Excessive Noise (Pump Cavitates, Suction Problems); Air In Oil - Kramp MPP Manuel D'utilisation

7.0

Supply of parts

As is the case for any mechanical installation, hydraulic installations are subject to wear and tear. Although Kramp Groep B.V.
has a well-stocked warehouse with respect to standard components, there may be situations when we cannot help you im-
mediately. In order to avoid costly downtime, we recommend that you build up a stock of a limited number of crucial
components, particularly if the installation contains components that are unique or difficult to replace, such as cylinders,
adjustable pumps and motors, proportional valves, electronic control devices, etc.
Spare parts should be ordered on the basis of the parts list and the hydraulic schematic, if present. When placing your order,
always indicate the correct brand, model number and any identification number.
We can draw up a quotation on request for the spare parts that Kramp Groep B.V. advises you to keep in stock. When in doubt,
our technical sales department will be glad to provide advice.
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Malfunctions

Despite all the care that we have devoted to your installation, malfunctions may occur, even if you have followed the
maintenance instructions. Malfunctions should be traced by qualified and professional personnel. If necessary, our technical
sales department or our maintenance department can provide technical support. Before attempting to trace the malfunction,
we recommend that you think matters through and become acquainted with the hydraulic system.
Malfunctions must be traced in a logical and systematic manner. In general, the reservoir should be the starting point.
1. Is the oil level correct?
2. Are the filters in good condition?
3. Are the pressure, oil flow and direction of flow as indicated?
4. Is the oil temperature correct (viscosity)?
5. Are there are any vibrations or noises (caused by cavitation)?
6. Is the electrical circuit in working order?
7. Is the emergency control gear in working order?
8. Did the malfunction occur suddenly or arise gradually?
9. Have any modifications been implemented recently?
Once the location of a malfunctioning component has been established, the surrounding area should be thoroughly cleaned
before the component is repaired or replaced. The cause of the malfunction should also be traced. Any parts that have broken
off should be located in connection with possible future instances of malfunction.Hydraulic components should never be
disassembled in the open air. Instead, perform disassemblies in specially equipped workshops. Contact Kramp Groep B.V. for
expert advice if the damage is serious, for instance, if hydraulic pumps, motors and cylinders have been completely
destroyed. Often, the entire system will have to be rinsed and cleaned in such cases.
A list of possible problems and their remedies is given below.
8.1

Installation produces excessive noise (pump cavitates, suction problems)

PROBLEM
Suction pipe or filter is obstructed.
Suction pipe is too narrow.
Too many bends in the suction pipe.
Medium is too cold.
Malfunctioning feed pump.
Tank cannot 'breathe'.
Viscosity of the medium is too high.
8.2

Air in oil

PROBLEM
Oil level in tank is too low.
Return pipe ends above oil level in tank.
SOLUTION(S)
Remove the obstruction; clean or replace the element in question.
Replace with a suction pipe with a larger diameter.
Reduce the number of bends or use a larger passage.
Heat the medium using a heating element.
Repair or replace the feed pump.
Install an aerating filter.
Replace the oil with an oil type with a lower viscosity.
SOLUTION(S)
Fill tank to the correct level.
Extend return pipe until it is below oil level.
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