Fausto Posted August 10, 2022 Report Share Posted August 10, 2022 Hello, The prop shaft coupling on my Narrowboat has just collapsed. I’m trying to dismount the coupling but part of it doesn’t want to come off. Also I need to find a replacement and I’m not sure which coupling. Any suggestions? I’ve attached few images , so you can have a better idea. Thanks Fausto. Link to comment Share on other sites More sharing options...
mrsmelly Posted August 10, 2022 Report Share Posted August 10, 2022 Looks like a centaflex coupling or similar. Link to comment Share on other sites More sharing options...
Tracy D'arth Posted August 10, 2022 Report Share Posted August 10, 2022 (edited) 17 minutes ago, Fausto said: Hello, The prop shaft coupling on my Narrowboat has just collapsed. I’m trying to dismount the coupling but part of it doesn’t want to come off. Also I need to find a replacement and I’m not sure which coupling. Any suggestions? I’ve attached few images , so you can have a better idea. Thanks Fausto. Take the 6 bolts out and put some of them in the unoccupied holes to jack the collet open and it will slide off. I think some of the couplings may need to use longer bolts than the ones there. Try with the existing first, screw them in and tighten them. You should feel the collet release. It is a Centraflex, https://www.rexnord.com/products-services/process-motion-control/couplings/torsionally-soft-couplings/centaflex-a Check the engine alignment to the prop shaft, a failure like that is usually a sign that the alignment is way off and you have exceeded the allowable out of alignment. Your engine mounting may well have settled down too much. Edited August 10, 2022 by Tracy D'arth 3 Link to comment Share on other sites More sharing options...
Fausto Posted August 10, 2022 Author Report Share Posted August 10, 2022 Thanks a lot! 1 Link to comment Share on other sites More sharing options...
DHutch Posted August 12, 2022 Report Share Posted August 12, 2022 Great work. Topic moved to boat building and maintenance section. Thanks Link to comment Share on other sites More sharing options...
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