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!!!

this help?Attachment 203837

he has a/c the alt and vac are connected by a small belt not a big one

ok how is this one?
Attachment 203836

thats what my 90 has!!! nice job Rupe!!

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

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?

thats odd!

i assume the vaccum pump is probably the ac compressor swapped out or do you still have ac?

Have ac , 5 other pulleys beside the crank and waterpump..

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.

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...................:-banghead

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

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.........................

here's another one.

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

Got me scratching my head.....I've seen trucks with extra vacuum pumps, they are used for a trailer brake system of vacuum over hydraulic brakes that isn't terribly common anymore (at least around here.)

Is there any chance that when your belts broke, one snuck out and got left on the road at the time? Just wondering if one is missing all together.

I have a Superduty here without AC, and a couple 7.3s with, I'll try to take a few pictures and post them later tonight and maybe they will help you out. Beyond that, all I can suggest is try the belts in the factory setup shown above, and see if a belt doesn't work that way, and maybe it will reveal itself as to how it does go?

can anyone tell me which bolts to remove in order to change all these belts??

I have the alternator loose, need the power steering pump and AC... Please help

anyone knows what is the belt model for A/C on 6.9 diesel 1986 please ?

each item has it's own tightening bolts. vacuum pump, alternator, air conditioner compressor, and power steering pump are all tightened separate from the others.

over 60K views and not a correct answer ... looks like lot of folks want to know this answer :D

if it is for an air brake application, i am wondering if it is an air compressor and not a vacuum pump.
either way, pictures of what you have are a lot better for us to figure out what you need than guessing without seeing it.

Agreed 100% ;) I'm just amazed at the view count.... like WOW

Part numbers
 

Does anyone have the correct part numbers, i want to have them in hand before i go to the parts store and they say they don't have them.
THANKS!

https://www.fixya.com/uploads/images/910d936.jpg

Found this doing a Google search.


Charlie

I assume the 6.9/7.3 V Belts should be the same???
Check out the picture in Post#7, It is w/o the AC Compressor though.

https://www.ford-trucks.com/forums/1...gram-6-9l.html




I checked the part #`s on my 6.9, all are Gates Green Stripe.
Alternator/Vacuum Pump
7320 Gates XL 10A0815

Crank/Power Steering
9600XL 13A1525

Alternator/Crank/Water Pump
9570 XL 13A1450

I do not have the AC Belt.

Charlie