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Post by Deleted on Feb 20, 2019 13:49:27 GMT
If running of travelpower I always switch off the inverter at its switch otherwise it starts buzzing. I really do think it's an alignment issue but happy to rule out all other possibilities. To check the pulley alignment you need to run a straight edge off the crankshaft pulley to the alternator pulley - it should be within a gnats knacker parallel I estimate that it is about 1 eighth of an inch (3mm) out of alignment - is that enough to be causing the problem?
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Post by Deleted on Feb 20, 2019 13:55:32 GMT
Is it a normal v belt or a flat one with lots of little grooves in it?
I just wonder if it is the latter whether it could be to do with over tensioning
My beta 90 has a flat polyvee belt for the domestic alternator which is a 175a unit 12v and they put a sticker on it "do not over tension".
These belts are usually associated with cars and multiple auxiliaries (serpentine or auxiliary belt) which includes an automatic belt tensioner. This is not fitted on my engine.
I guess that's why they warn about over tensioning it.
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Post by Deleted on Feb 20, 2019 13:58:09 GMT
To check the pulley alignment you need to run a straight edge off the crankshaft pulley to the alternator pulley - it should be within a gnats knacker parallelΒ I estimate that it is about 1 eighth of an inch (3mm) out of alignment - is that enough to be causing the problem? Yup, that's carpenters accuracy π That's quite a bit for what should have been a like for like replacement. Is the alternator pulley sticking further forward of the crankshaft pulley or is it lagging behind it? You may be able to get it back using washers as shims - a couple of snaps would help to see what's going on. Looking from above the alternator and it's mounting bracket to the engine
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Post by Deleted on Feb 20, 2019 13:58:31 GMT
It's a v belt but with 'teeth' in the underside.
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Post by Deleted on Feb 20, 2019 14:01:31 GMT
I estimate that it is about 1 eighth of an inch (3mm) out of alignment - is that enough to be causing the problem? Yup, that's carpenters accuracy π That's quite a bit for what should have been a like for like replacement. Is the alternator pulley sticking further forward of the crankshaft pulley or is it lagging behind it? You may be able to get it back using washers as shims - a couple of snaps would help to see what's going on. Looking from above the alternator and it's mounting bracket to the engine Alternator lagging behind. will have a look at mounting brackets etc. It's quite a complex mounting....
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Post by Deleted on Feb 20, 2019 14:04:53 GMT
Yup, that's carpenters accuracy π That's quite a bit for what should have been a like for like replacement. Is the alternator pulley sticking further forward of the crankshaft pulley or is it lagging behind it? You may be able to get it back using washers as shims - a couple of snaps would help to see what's going on. Looking from above the alternator and it's mounting bracket to the engine Alternator lagging behind. will have a look at mounting brackets etc. It's quite a complex mounting.... I'll keep my fingers crossed it can go forwards!
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Post by TonyDunkley on Feb 20, 2019 14:09:14 GMT
Yup, that's carpenters accuracy π That's quite a bit for what should have been a like for like replacement. Is the alternator pulley sticking further forward of the crankshaft pulley or is it lagging behind it? You may be able to get it back using washers as shims - a couple of snaps would help to see what's going on. Looking from above the alternator and it's mounting bracket to the engine Alternator lagging behind. will have a look at mounting brackets etc. It's quite a complex mounting.... Some photo's would be good if you can get some and put them on here. Don't worry about what look like 'teeth' along the narrower face of the belt, . . . the gaps between the 'teeth' are just there to help the belt to wrap around small diameter pulleys easier and without developing cracks due to flexing strain, but you/we also need to make sure that the pulley fitted to the alternator is intended for the same cross-section and/or width of belt as the groove on the engine crankshaft pulley. When you've got a few minutes, have a read through this blurb from Gates - belt manufacturers/suppliers : < www.powertransmission.com/articles/0617/Guide_to_V-Belt_Selection_and_Replacement/ >
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Post by Deleted on Feb 20, 2019 14:23:42 GMT
so its a vee belt. There was a suggestion earlier it was a multi vee type. If its a 140a alternator that's too much for a single vee belt in the event that the alternator is loaded to its capacity.
Eta it sounds just like the problem I had where the new alternator had a slightly different thickness on the casting around the mounting holes.
Another thing to look at is does it have a sleeve inside one of the alternator mounting holes which can be knocked in a bit to correct the alignment problem?
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Post by Deleted on Feb 20, 2019 14:47:18 GMT
Not a great photo but does show the bottom mount. A couple of washers at the bolt head, if removed would probably align the pulleys. No nut on the end of the bolt - I'm assuming there should be one.
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Post by TonyDunkley on Feb 20, 2019 15:01:51 GMT
Not a great photo but does show the bottom mount. A couple of washers at the bolt head, if removed would probably align the pulleys. No nut on the end of the bolt - I'm assuming there should be one. Can't really see enough detail on that, . . especially with what's going on at the bottom of the photo. Is that where the nut's missing ? Another one with a bit more light would be good, plus one, or two, showing both ends of the adjuster stay.
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Post by Deleted on Feb 20, 2019 15:07:10 GMT
Top of pic,
Bolt Mounting bracket 2 washers Alternator 2 washers Mounting bracket Open ended bolt (no nut or washer)
If that helps.
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Post by TonyDunkley on Feb 20, 2019 15:09:38 GMT
Top of pic,
Bolt Mounting bracket 2 washers Alternator 2 washers Mounting bracket Open ended bolt (no nut or washer)
If that helps.
Is the threaded end of the bolt into a plain hole or a threaded hole ?
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Post by Deleted on Feb 20, 2019 15:14:15 GMT
Top of pic,
Bolt Mounting bracket 2 washers Alternator 2 washers Mounting bracket Open ended bolt (no nut or washer)
If that helps.
Is the threaded end of the bolt into a plain hole or a threaded hole ? Seems to be a plain hole as whatever way I turn the bolt it stays in the same position. i.e doesn't tighten or loosen
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Post by TonyDunkley on Feb 20, 2019 15:30:30 GMT
Is the threaded end of the bolt into a plain hole or a threaded hole ? Seems to be a plain hole as whatever way I turn the bolt it stays in the same position. i.e doesn't tighten or loosen OK, . . try assembling the alternator to the mounting bracket without the two spacer washers at the fan end, and, for ease of assembly, with the bolt inserted the other way round so you can put however many washers you need, including the two taken from the fan end, at the connections end of the alternator over the partially inserted bolt before pushing it all the way in and through the hole in the alternator body. Sticking all the washers together with a dab of sterntube/stuffing box grease will make things easier too. Find a suitable nut for the threaded end of that bolt, tighten everything up, and then re-check the alignment.
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Post by peterboat on Feb 20, 2019 16:01:19 GMT
Why can't washing machines and dryers in boats be run off 240v produced by a petrol-burning generator, like those Honda suitcase ones? Seems like an answer to me. Because Foxy its easier to do it with an alternator, battery bank and inverter! plus less chance of a petrol fire, gennie being nicked or the cost of an inverter gen what can power a modern washing machine
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