ianc Posted April 14, 2023 Report Share Posted April 14, 2023 The fan of my 1971 Kenlowe didn't look like that shown in David's photo. It was made of white plastic and had a circular rim round the periphery, mating with the end of each of the blades. And, as James stated, to accommodate the change to negative earth (in 1993), it was necessary solely to swap the connections in order to keep it blowing in the correct direction. Ian Cornish Quote Link to post Share on other sites
David Arrowsmith Posted April 20, 2023 Report Share Posted April 20, 2023 Interesting. I checked for earth continuity on both sides of motor and got none, so I swapped over the connections to the pos and neg feeds. I switched the fan on and did it turn in the opposite direction? No! It refused to turn at all and the ammeter blipped to full discharge! Luckily the fuse didn’t blow. I checked to see if the fan was free to turn in both directions and it was. I swapped the leads back to their original positions and the fan is happily blowing through the radiator again. Could it be that the brushes are worn so they let the armature rotate one way but not the other? Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 20, 2023 Report Share Posted April 20, 2023 20 minutes ago, David Arrowsmith said: Interesting. I checked for earth continuity on both sides of motor and got none, so I swapped over the connections to the pos and neg feeds. I switched the fan on and did it turn in the opposite direction? No! It refused to turn at all and the ammeter blipped to full discharge! Luckily the fuse didn’t blow. I checked to see if the fan was free to turn in both directions and it was. I swapped the leads back to their original positions and the fan is happily blowing through the radiator again. Could it be that the brushes are worn so they let the armature rotate one way but not the other? Will go digging in the shed tomorrow. I may have a used sucker type Kenlowe of the same design, it is yours for the postage if I find it. Quote Link to post Share on other sites
Lebro Posted April 20, 2023 Report Share Posted April 20, 2023 Could be a diode in the casing to prevent voltage spikes. that would look like a short circuit if polarity reversed. Bob Quote Link to post Share on other sites
David Arrowsmith Posted April 20, 2023 Report Share Posted April 20, 2023 That’s incredibly generous of you Peter, thank you! Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 21, 2023 Report Share Posted April 21, 2023 12 hours ago, David Arrowsmith said: That’s incredibly generous of you Peter, thank you! The Kenlowe fan and motor are found and tested. All working fine. Have marked it for + or - connection to give clock or anti clock motor rotation. PM me your address and I will get it in the post next week. Quote Link to post Share on other sites
David Arrowsmith Posted April 21, 2023 Report Share Posted April 21, 2023 Thanks Peter, address, etc PM’d. That’s really kind of you. I have only fairly recently purchased my TR2 and I am still getting to know it. Looking at the best way to get at the fan to swap them over, I was surprised to see (what looks like) the original radiator with a proper hole through it for the starting handle to engage with the crankshaft pulley! Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 21, 2023 Report Share Posted April 21, 2023 6 hours ago, David Arrowsmith said: Thanks Peter, address, etc PM’d. That’s really kind of you. I have only fairly recently purchased my TR2 and I am still getting to know it. Looking at the best way to get at the fan to swap them over, I was surprised to see (what looks like) the original radiator with a proper hole through it for the starting handle to engage with the crankshaft pulley! The PM has not arrived. Quote Link to post Share on other sites
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