Key Findings:

• Displaced 'O Ring': The investigation revealed a displaced 'o ring' on the slow speed shaft, accompanied by signs of oil leakage from the machine.
• Low Oil Level: The oil level was below the required marker for the gearbox. The technician topped up the oil to the correct level during the visit.
• High Speed Shaft Issues: Further investigation indicated that the vibration and noise primarily originated from the high speed shaft, with a suspected bearing issue on one of the shaft bearings.
• Encoder or Drive Issues: There was a possibility that the fault could be related to the high speed shaft encoder or drive, with oscillation indicating a potential imbalance in frequency output.
• Wear and Tear: Given the machine's approximate run of 5,500,000 cycles and the evidence of oil leakage and low oil levels, wear within the high speed shaft was deemed the most likely cause of the issue.
• Guide Ropes Condition: Examination also revealed signs of rouging and flat spots on the lift's main guide ropes, with a reduction in nominal diameter, prompting a recommendation for their replacement.
• Safety Gear and Pulleys: The lift's safety gear was clear of the guide rail, and the diverter pulleys for the car top and counterweight were in reasonable condition, with no visible wear.