Refer to the attached report on the defective oil level gauge. Please advise when this transformer was delivered and installed in Australia. It seemed that this transformer had been operating for quite some time, as I can see from the photos that the transformer tank top was rusty.
The report mentioned that the M8 nut had dropped off and there was no lock washer. But from the photo on page 6 of 9, there was sign showing that there was originally a lock washer fitted on the screw threads (noticed the marks made by a lock washer on the gauge indicating dial).