Stripped M8 Thread on Alternator Body

[macd]

Having second thoughts here, bit of 8mm stainless under dynamic compression loads for years. Hmm./QUOTE]

...as opposed to a manky strip of mild steel with a huge slot in it? Bottle screw plus spherical joints works a treat with V-belts. Not really needed for polyvee, which run less tight and rarely need adjusting, anyway.

 

[GHA]

...as opposed to a manky strip of mild steel with a huge slot in it?

Exactly Masses of material in section with solid terminations. Loads more than some piddly m8 stainless threads. M10 maybe, M8.... too much to think about into the third night motoring..

 

[RichardS]

Not really needed for polyvee, which run less tight and rarely need adjusting, anyway.

Are you sure about that?

My son and I put a new polyvee alternator / water pump belt on his Suzuki a few weeks ago. I tightened it the same as I am used to with ordinary V-belts at about 1cm deflection either way but ever since then we could sometimes hear the belt squealing a bit on first start-up. We checked the manual yesterday and it's supposed 4mm deflection. That is really tight - I had to use a long lever against the alternator to achieve it. Seems OK now.

Richard

 

[Poecheng]

Found this on fleabay tonight and might be what NM is thinking of making and might be of use to others

http://www.ebay.co.uk/itm/Adjuster-...361?pt=LH_DefaultDomain_3&hash=item41944d0f29

 

[macd]

Are you sure about that?

My son and I put a new polyvee alternator / water pump belt on his Suzuki a few weeks ago. I tightened it the same as I am used to with ordinary V-belts at about 1cm deflection either way but ever since then we could sometimes hear the belt squealing a bit on first start-up. We checked the manual yesterday and it's supposed 4mm deflection. That is really tight - I had to use a long lever against the alternator to achieve it. Seems OK now.

Richard

Every polyvee guide I've read warns about overtighening: i.e. applying no leverage other than a shove with the hands. (This is obviously in the case of belts running without an automatic tensioner.)

 

[nigelmercier]

Found this on fleabay tonight and might be what NM is thinking of making and might be of use to others

http://www.ebay.co.uk/itm/Adjuster-...361?pt=LH_DefaultDomain_3&hash=item41944d0f29

Very similar, but I need it much shorter.

All is not lost it seems, the diodes are only pressed into the heatsink, so there is a chance to replace them. I've also drawn out a diagram, and it all makes sense. I was expecting 9, diodes, but there are only 6. It also appears that this model is based on a Delco unit.

 

[nigelmercier]

It also appears that this model is based on a Delco unit.

More from Balmar, for info: "As best we can determine these are Renard 225070 and 225071, 50 to 70 amp diodes ..."