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Post by ianpowolny on Aug 31, 2014 7:12:23 GMT
Affinity will be out of the water in the next couple of weeks and I'm going to remove the prop (standard production 3 bladed). I've never done this job before and I'm not sure what to do. I guess I remove the anode and then what do I do? Do I need any special tools? How heavy will a 20" prop be and does this need second person to help? Advise please.
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Post by Spritz on Aug 31, 2014 9:31:07 GMT
Well, in reality is quite simple, you detach the anode and then you should have to unscrew the bolt you will find. Then the most difficult part is to take away the prop. Could be difficult and you could need an extractor, this if the prop is there from a long time.
krs
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Post by ianpowolny on Aug 31, 2014 13:39:00 GMT
Yes I thought it might be simple. Any thoughts on the extractor?
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Post by tedp on Aug 31, 2014 16:33:49 GMT
Heat the prop boss gently with a blowtorch. It may come off after a single tap with the hammer. Catch it with gloves, though!
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Post by On y va on Aug 31, 2014 19:35:43 GMT
One little step has been forgotten. You cannot remove the nut, without flattening the stainless nut securing plate. If you do this carefully, you should be able to use it at least one more time. Use a blunt chisle or so, to carefully tap the little flaps straight.
In regards to taking off the prop. Do not start hammering away, as this will most likely damage the Volvo shaft seal and ultimately also your gearbox. Do as suggested by tedp.
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Post by electricmonk on Sept 3, 2014 9:14:36 GMT
1. loosen the nut a couple of turns - don't remove it. So when the prop has parted from the taper it wont need catching!
2. A three pronged puller should be good enough to remove the prop if a tap from a hammer wont do the trick - if one tap wont free it then stop tapping.
3. Put the puller onto the prop then tie a line around the prongs to help them stay in place.
4. Load up the puller by turning the bolt until its very tight, no need to use bars just a normal sized spanner and get it as tight as you can.
5. Find a bar and have a few beers, or a cup of tea and a cake if that's your preference.
6. Return to the boat and most times you find that the prop is off, if its not then a tap with a hammer should free it.
7. If its still firmly on then you could tighten the bolt a little more and have another beer.
I have never been to stage 7.
I have removed lots of propellers but only 3 from my own boats, but then I do carry the puller on-board . . . .
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Post by ianpowolny on Sept 3, 2014 20:22:51 GMT
Thanks guys. I'll let you know how I get on. Affinity is out of the water on the 10th September and need to get the prop off that day, so not long now.
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Post by ianpowolny on Sept 10, 2014 18:33:01 GMT
Today I removed the prop. The anode came off easily; then I flatten the retaining plate such that it can be used again. I couldn't buy a puller in Veveiro but managed to get a blow torch that worked off our Camping Gaz cylinder. I heated the prop boss while having the screw loose but not off. After about 15 minutes and a few knocks with a nylon hammer the prop came free. It hadn't been off for 6 years so I thought I'd had a good days work.
Now off to the boat show to finalise which new prop to buy!!!
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Post by MalcolmP on Sept 10, 2014 19:19:50 GMT
Today I removed the prop. The anode came off easily; then I flatten the retaining plate such that it can be used again. I couldn't buy a puller in Veveiro but managed to get a blow torch that worked off our Camping Gaz cylinder. I heated the prop boss while having the screw loose but not off. After about 15 minutes and a few knocks with a nylon hammer the prop came free. It hadn't been off for 6 years so I thought I'd had a good days work. Now off to the boat show to finalise which new prop to buy!!! Hi Ian Glad that it came of easily. Looking forward to seeing you on Sunday sometime on the Bruntons Stand G110. I was hoping Eileen would also be down but don't think she will that day cheers Malcolm |
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