Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:18:23 GMT
Ok something is wrong. Suggestions of what to ask the person who fitted the alternator most welcome.
Other thing is will it harm the alternator if I continue cruising for a week of two without the belt?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:21:47 GMT
I suggest its an alignment problem as I mentioned previously. It does want lining up properly.
|
|
|
Post by Mr Stabby on Feb 19, 2019 20:25:55 GMT
How long had you had the engine running after the belt was fitted before it shredded?
Did you re-tension the belt after it was installed, at least twice?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:27:09 GMT
As @someboater says, alignment and check any tensioner pulley is free running.
As long as it’s the second alternator and doesn’t run the water pump it won’t really matter, if it is not turning it’s not generating! Pull d+ wire off to completely isolate it, it needs to be excited to start, no D+ = no juice anyway!
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:27:38 GMT
How long had you had the engine running after the belt was fitted before it shredded? Did you re-tension the belt after it was installed, at least twice? About 20 hours and nope to other questions.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:30:43 GMT
How long had you had the engine running after the belt was fitted before it shredded? Did you re-tension the belt after it was installed, at least twice? You forgot to mention saying Bettlejuice three times as well 🧐
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:32:10 GMT
I had rapid belt shredding on one occasion (a normal v belt not a flat multi v type) just after I fitted a new alternator and the reason was that the new alternator had slightly different casting thickness on the bolt mount holes which pushed it slightly of line with the crank pulley.
I lined the alternator up properly and its done several hundred hours since without any problems.
Another possibility would be some sort of failure of a regulator resulting in excessive load on the alternator but seems less likely.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:32:13 GMT
Apropos nothing in particular:-
How big is your inverter?
|
|
|
Post by Mr Stabby on Feb 19, 2019 20:35:18 GMT
How long had you had the engine running after the belt was fitted before it shredded? Did you re-tension the belt after it was installed, at least twice? About 20 hours and nope to other questions. You have to re-tension an alternator belt after it has been running for an hour or two, and again after another 8-10 hours of running, and then check and adjust the tension at every inspection/ service after that. All new belts stretch, and if a toothed belt isn't kept in proper tension then the teeth will start being torn off when the alternator is under load, leading to the belt becoming looser until it fails... the classic "Vicious Circle".
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:38:37 GMT
Apropos nothing in particular:- How big is your inverter? 1.6 I think. Will have to have a look if it's important. Both times the belt shredded were whilst using the washing machine via the 'generator' (forget what it's called for now - runs off engine)
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:39:59 GMT
About 20 hours and nope to other questions. You have to re-tension an alternator belt after it has been running for an hour or two, and again after another 8-10 hours of running, and then check and adjust the tension at every inspection/ service after that. All new belts stretch, and if a toothed belt isn't kept in proper tension then the teeth will start being torn off when the alternator is under load, leading to the belt becoming looser until it fails... the classic "Vicious Circle". That’s all well and good but I have a feeling it’s a multi ribbed vee belt on @donkey engine which should require no such farting about with (neither should a correctly installed vee belt but there we are....)
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:42:47 GMT
Apropos nothing in particular:- How big is your inverter? 1.6 I think. Will have to have a look if it's important. Both times the belt shredded were whilst using the washing machine via the 'generator' (forget what it's called for now - runs off engine) I ask only for sizing a VSR, I think you’d benefit from one as a means of redundancy! is it the Travelpower belt that’s gone then? 240v generated by the travelpower shouldn’t cause the domestic batteries be depleted loading up the domestic alternator.
|
|
|
Post by Mr Stabby on Feb 19, 2019 20:43:36 GMT
The other "Mr Stabby Top Tip" is that when installing a new alternator belt, you should always wipe off all pulley faces with petrol, white spirit, thinners etc..at a push a few drops of Fairy Liquid in some warm water is better than nothing... you'd be amazed how many "marine engineers" don't bother doing this. Fitters just fit things and can't think beyond this.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:45:54 GMT
1.6 I think. Will have to have a look if it's important. Both times the belt shredded were whilst using the washing machine via the 'generator' (forget what it's called for now - runs off engine) I ask only for sizing a VSR, I think you’d benefit from one as a means of redundancy! is it the Travelpower belt that’s gone then? 240v generated by the travelpower shouldn’t cause the domestic batteries be depleted loading up the domestic alternator. No it is the domestic alternator belt that has gone. Travelpower still good.
What is a VSR?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 19, 2019 20:48:37 GMT
This seems to be a 230v mains electric issue.
Maybe the travelpower is not switched on and the domestic alternator is attempting to supply 2kw to the washing machine heater element via the inverter resulting in belt failure. Turn the inverter off and see if there is still mains power ?
Travel power should be a totally seperate system.
@donkey do you get mains electric with the inverter switched off but engine running. If you have travelpower on there then you should do.
Is there some sort of selector switch which gives you "shore,travel power, inverter" or similar?
If the washing machine is running off a 12v alternator via an inverter then the heating phase of the wash cycle is going to be a killer.
|
|