So what I'm understanding:
Installing a 215 amp ambulance alternator requires a longer belt.
Doing a SD water pump pulley by itself with a stock OBS alternator.....don't know.Installing a 99 up Super Duty fan pulley with a smaller diameter requires a shorter belt.
SD pulley with 215A alternator.... Motorcraft: JK8-1202A (belt for 215A alternator). It's within the marks on the tensioner but on the loose side.Doing both together cancels out the belt issue, what ever belt was right for the tensioner set up installed will still be correct with both alt and pulley installed together.
215A alternator ....Done w/pics - Diesel Forum - TheDieselStop.comBilly,
Did you use the Ford harness for the 215 amp Alternator or did you make your own?
If you bought it do you have a part #?
Yes you can. It is where I bought mine.you cannot get the dual arm tensioner from rockauto.
Thanks for posting this; this is an important bit of info. You can pull up the pics of the Gates, Dayco, etc. versions on RockAuto's site, and if you zoom in and look REAL close at the back-side view, indeed you see that the ribbed pulley is on the "fixed" part of the tensioner body. Easy thing to miss.Do not get the non-motorcraft one from O'REilly's or similar as it is not a true, dual pivoting design.
What year truck? If OBS, no, the smooth pulley is fixed and the ribbed pulley applies the tension. If SD, then yes, the smooth and the ribbed pulleys are mounted together and both rotate to apply tension. The knockoffs mount like the new one but only one pulley pivots.Bugman and Leojr, I found it on Amazon. Way easier. I shouldn't have to really modify anything tho, I already had the dual arm on there already. Right?
You should check your installation against the TSM to see if it was installed correctly, especially if you were shredding belts before.Bugman and Leojr, I found it on Amazon. Way easier. I shouldn't have to really modify anything tho, I already had the dual arm on there already. Right?
On the new design, the two tensioner pulleys are mounted and pivot together like a see saw does. Though the pulley bearings may wear out, the assembly doesn't.
The older design has one pulley fixed, and the other pulley pivots. As this single armed assembly wears out it tends bend outwards out of alignment.
As Ford changed to this design it is presumed an improvement.
The proper pulley assembly can be a little hard to find as the cheap AutoO'Rielly's parts store assembly does not have the two pulleys on a common, rotating bar, rather, one is fixed and one pivots, defeating the primary design improvement. Seek a Motorcraft BT-50 only.
The draw back, for me, is the belt length can be hard to find. And the routing is now a little different than the routing in the diagram on the sticker across the top of the radiator support. I found a sticker that shows the revised routing and placed it next to the original and also wrote the belt part number next to it with a Sharpie.