Operation
7.2 Fault – causes and correction
44 Edition 09/2022 M3560-02en
• Flange surfaces of screwed connections not cleaned.
• Alignment and/or shaft misalignment values not set in accordance with the instructions.
• Coupled machines were not correctly connected to the foundation so that a shifting of
the machines leads to an impermissible displacement of the coupling parts.
• Coupled machines not earthed adequately.
• Coupling guard used is not suitable.
7.2.2.2.3 Maintenance-related causes7.2 Fault – causes and correction
• Stipulated maintenance intervals not adhered to.
• Replacement parts that were used were not original replacement parts from Flender.
• Flender replacement parts that were used were old or damaged.
• Leak in the area of the coupling not detected so that chemically aggressive substances
damage the coupling.
• Indications of faults, such as noise or vibration, were not heeded.
• Stipulated tightening torques not adhered to.
• Alignment and/or shaft misalignment values not set in accordance with the instructions.
7.2.2.2.4 Specific assembly-related and maintenance-related causes7.2 Fault – causes and correction
• O-rings (12) not fitted.
• O-rings (12) heated up excessively when applying heat to the coupling parts.
• Sealing surfaces smeared or damaged.
• Lubricant not applied correctly.
• Missing sealing compound (50) in the set screw hole.
7.2.3 Resolving faults7.2 Fault – causes and correction
7.2.3.1 Resolving lubricant shortage7.2 Fault – causes and correction
Lubricant shortage is caused by the coupling leaking or overaged lubricant.
Procedure
1. Drain the lubricant in accordance with Lubricant replacement (Page47).
2. Correct the cause of the leakage.
3. Carry out a visual inspection of the gears and the seals for damage.
4. Check the locking elements that prevent axial movements and correct these as required.
5. Realign the coupling.
6. Fill with new lubricant according to Fill with lubricant (Page36).
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