Alternator squeeks on startup

[Biggles]

The amount of wrap on the pulley is also important. This is why idlers are used.

 

My fancy new 215amp alternator has a PK7 belt about 33mm in section. 4.5:1 increase. So far no slipping.

Edited May 12, 2013 by Biggles

[exfire]

I had my engine serviced 3 weeks ago and had both alternator belts replaced, the 1 on the second alternator was starting to slip. the engineer fitted a AVX10x975 which has just shredded after running about 20hrs . the spare belts that I have aboard are AVX10x100La which appear to be to long as the alternator is at full adjustment. Am I right in thinking that the difference in the belts is 25mm length? I think that the alternator may be out of line after the engineer had trouble with the adjustment and reshaped the bracket

[exfire]

I had my engine serviced 3 weeks ago and had both alternator belts replaced, the 1 on the second alternator was starting to slip. the engineer fitted a AVX10x975 which has just shredded after running about 20hrs . the spare belts that I have aboard are AVX10x100La which appear to be to long as the alternator is at full adjustment. Am I right in thinking that the difference in the belts is 25mm length? I think that the alternator may be out of line after the engineer had trouble with the adjustment and reshaped the bracket

Posted this Then went looking around the forum and found all the answers that I needed

[Naughty Cal]

I had my engine serviced 3 weeks ago and had both alternator belts replaced, the 1 on the second alternator was starting to slip. the engineer fitted a AVX10x975 which has just shredded after running about 20hrs . the spare belts that I have aboard are AVX10x100La which appear to be to long as the alternator is at full adjustment. Am I right in thinking that the difference in the belts is 25mm length? I think that the alternator may be out of line after the engineer had trouble with the adjustment and reshaped the bracket

I would get your engineer back to sort it out.

[RLWP]

I would get your engineer back to sort it out.

 

So would I. 20 hours is a very short time

 

Richard

[ditchcrawler]

I would get your engineer back to sort it out.

Would you want him back, I wouldn't.

[RLWP]

That's an excellent point

 

Is this a new use of the word 'engineer' that I wasn't aware of?

 

Richard

[bizzard]

I have simple electrics on my boat, a 70amp alternator driven by an ordinary V belt, 13 years on and about 6000 hours and the same belt has hardly worn at all. If I were to go high power and complicated I wouldn't hesitate to cobble up an auto tensioner if I used the a multi-V belt arrangement probably a Ford unit.

[Timleech]

My experience of Poly vee arrangements has been that if they are working within design limits and correctly tensioned and aligned they hardly ever need attention.

 

Tim