60
ARPEX 8706 en
Operating instructions 10/2017
9.3.2
Possible faults when fitting the coupling
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Components with transport or other damage are being fitted.
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When fitting coupling parts in a heated condition, these components are being excessively heated.
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The shaft diameter is beyond the specified tolerance range.
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Coupling parts are interchanged during fitting work.
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Nonobservance of component markings for assembly balancing (see item 6.7) while the coupling is
fitted.
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Specified tightening torques are not being adhered to.
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Alignment and/or shaftmisalignment values do not match the specifications on the orderspecific
drawing of the coupling.
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The coupling protection used is not suitable for operation within the meaning of the
explosionprotection requirements and/or in accordance with Directive 2014/34/EU.
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Operating conditions are being changed without authorisation.
9.3.3
Possible faults in the maintenance of the plant
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Maintenance intervals are not being adhered to.
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Impermissible shaft misalignments occur, which are caused by the coupled units settling and were not
taken into consideration when designing the coupling.
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Leakage in the vicinity of the coupling is not being identified and as a result chemically aggressive
media are damaging the coupling.
