Hi all this is on-going. The motor is partially seized, i.e. you can turn it over with pliers with some oil on the bearings it freed up a little and then 6 volts had it trying to turn and eventually it was running in fits and starts. Also it had some dead spots. Not good news. I decided to remove the motor and that is when I found I was covered in this orange dust. It was like a rust on the motor but shed itself everywhere, floor, me etc.
I was about to discard it when a tiny label was found it was from Deans Marine with an address but no reference to the motor type. It is 540 in size and 5 pole. Anyone know which one it is?
A day or so later I retrieved it from the bin and using a couple of small glass jars I poured a lidful of methylated spirits through the motor into one jar, then swapped jars and then re-poured the residue back through the motor. Did this several times and this freed up the insides, I shook it dry and outside I applied a few volts, I was not sure if the cleaner might take fire but it did'nt. It started straight away so oiled the bearings and it ran much better, however now and again the tone of the motor would change and I had been suspicious that an armature coil was not always getting any power.
So I have kept it back but do not trust it!
I fitted another motor which free running was 0.7 amps but when connected up there was a lot of vibration and running current was 2.2 amps. So I took the motor out and then the U/J. The U/J was really stiff, it was a red plastic Huco type and seemed to be the main culprit. I found a replacement U/J and reinserted the ends (they were not brass).
This did reduce the vibration but not by much and it became clear that the screwed down end on the prop shaft was mis-aligned. On examining it was a relatively short end less than a centimetre showing with a deep groove filed into it to receive the grub screw. However I think it was causing the grug screw to take the U/J end out of true with the shaft.
So off with the prop and I managed to slide the shaft out past the rudder. BUT I also noticed that at the rear prop tube bearing the shaft was not plain but threaded for quite a long way!!! So the lower bearing maybe suspect as well.
I found another prop shaft and inserted it and the bearing feels OK. I shall fit another prop shaft tomorrow as I do not have one long enough to hand. This was all meant to be a casual check before getting the RC to work, the escalation was unexpected. I am proposing to fit a plastic dog bone U/J which I think came from SHG many years ago as I am suspicious of the drive train alignment and the dog bone connection will solve this.
Regards to all
Roy
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Topic: Can anyone tell me which kit this Perkasa was made from (Read 1360 times)