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belt diagram for 7.3?

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Old 04-28-2010, 07:39 PM
texasjack texasjack is offline
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belt diagram for 7.3?

I must be gettin old, 2 belts snap off my 90 superduty.It has 4 belts total, 5 pulleys, besides crank and water pump pulleys. I can't figure out how the power steering belt, ac compressor, and vac pump (on top of the motor) go on.Took the belts down , made those folks read the numbers off the belts .. O' wisdom from the clan help me!!!
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Old 04-28-2010, 10:14 PM
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this help?
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Old 04-28-2010, 10:21 PM
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he has a/c the alt and vac are connected by a small belt not a big one
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Old 04-28-2010, 10:26 PM
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ok how is this one?
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Old 04-28-2010, 10:30 PM
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thats what my 90 has!!! nice job Rupe!!
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Old 04-28-2010, 10:31 PM
texasjack texasjack is offline
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That diagram does not show ac compressor or vac pump on high side to right.
O-alt O vac O ac

O-vac? O wP O-ps
O-crank

Last edited by texasjack; 04-28-2010 at 10:34 PM. Reason: not posting diagram correctly
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Old 04-28-2010, 10:38 PM
texasjack texasjack is offline
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I have another vac pump just to the left of the air compressor on top..... this super duty was set up to tow using air to release brakes, maybe why it has 2 vac pumps?
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Old 04-28-2010, 10:41 PM
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thats odd!
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Old 04-28-2010, 10:42 PM
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i assume the vaccum pump is probably the ac compressor swapped out or do you still have ac?
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Old 04-29-2010, 09:57 AM
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Have ac , 5 other pulleys beside the crank and waterpump..
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Old 04-29-2010, 11:07 AM
greywynd greywynd is offline
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texasjack, sounds like you certainly have something different than the norm, with having the second vacuum pump. Does either your AC or your PS pump have a double pulley? The vacuum pumps don't take a lot of power to run, hence why they are often ran off a secondary pulley from another source.
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Old 04-29-2010, 02:21 PM
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The ac, both vac pumps,ps,ac are single groove. Of course, water pump and crank pulley are 3 groove.The 1st VP is below the alt,have that belt on. The 2nd VP is on the
left side on the ac compressor, maybe sitting a inch higher. Wish I could draw it on here...................
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Old 04-29-2010, 03:29 PM
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is this a powerstroke engine lol? We are definitely going to need some pictures. Sounds like franken truck two might be developing hahaha

The second VP above right sounds like a move when you go over to the serpentine belts. Did they have serpentine then go back?? haha
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Old 04-29-2010, 03:51 PM
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7.3 IDI, F-450. Well after looking at it maybe the belt goes around ac, then 2nd VP( since they are right next to each other) and back around crank and waterpump pulleys.
But the belt that snapped, bought exact size no.# doesnt fit.........................
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Old 04-29-2010, 06:53 PM
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here's another one.

DOH.never mind thats a DI (powerstroke),my bad.
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