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M35a2 additional alternator

blisters13

blisters13

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graf_222 said:
I mounted my 12 volt alternator right above the stock 24 volt. I used longer belts and a replacement double pulley from a IH 966 tractor. The alternator seems to fit well in that place and so far neither pulley slips even though there is much less belt contact on the 24 volt pulley.
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You won't have a slipping-belt problem as long as the batteries are generally well-charged. Slipping belts are more likely to happen with more discharged batteries as more torque is required to put out more amps.

Nice set-up. GM alternator? Which one? Part numbers for longer belts?
 
graf_222

graf_222

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blisters13 said:
You won't have a slipping-belt problem as long as the batteries are generally well-charged. Slipping belts are more likely to happen with more discharged batteries as more torque is required to put out more amps.

Nice set-up. GM alternator? Which one? Part numbers for longer belts?
Click to expand...
Yup, just a 10SI GM alternator. It is the 63 amp version from a 1986 K10 pickup.

As for the belts, I used two Dayco 17570, but the length needed will depend on how close the alternator gets placed to the engine.
 
blisters13

blisters13

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Gotcha! It does help to know the belt length since you already have a successful install and so other people will have a benchmark to start with. Thanks for the post!
 
tm america

tm america

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i sell the brackets you need to to install a 12 alt on a multifuel.. i have them listed in the classifieds..the price is 50 plus 10.70 shipping they use a 10si alt
 
tm america

tm america

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The 12 volt alt uses a 55 inch long 1/2 inch belt ..So the numbers on the belt will be 4l550 or l455.the 12 volt alt brackets work with either a 10si,12si,or 130cs alt....The 24 volt kit uses stock belts
 
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