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Old 11-08-2010, 09:49 AM   #2
Marin
Scraping Paint
 
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Join Date: Oct 2007
Posts: 13,745
RE: Ford Lehman Alternator Upgrade

Call Bob or Brian Smith at American Diesel. They know more about Lehman engines than just about anyone and they can tell you what is required to put a larger alternator on the engine. I believe you need to double the belt and so will need a new pulley for the front of the engine. They also may recommend running a separate belt for the water pump as putting a lot of sideways pressure on the coolant pump of an FL120 is a good way to shorten the bearing life.

But talk to them--- they will be able to tell you the best way to do it and probably have all the parts you need.
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