V belts for my J10 ?

[candymancan]

So on rock auto for my 76 J10, there are so many Vbelts, my Jeep has a/c and power steering, not too concerned about the a/c going atm, Just need the power steering and fan.

When the v belt says a/c, fan, power steering. Does this mean it fits all 3 ? So i just buy 3 of em ? Im confused, because some say fan, alternator, without a/c.. But why would this matter, if the alternator has its own belt ??

My head is about to explode lol maybe im just a rtard, but could someone point me to which belts i need, the 50 choices is confusing me

[tgreese]

Suggest you get the parts book and look up the original part numbers. Cross that to the mfr's number on RockAuto. Or take the belt to the parts store and ask for a match. They will measure it and supply a match.

[Stuka]

Doesn't the Jeep have belts on it currently? They should have their measurements, which is really all that matters.

[tgreese]

There can be different widths of belts. Most are standardized in this era, so that's probably not an issue. If there is printing/ numbers, you can get that length or cross whatever numbers are there to another mfr. Note that numbers can be molded in and might not show up without close (in-hand) inspection.

If all else fails, the shop can measure the old one, or run a piece of thick rope around the pulleys and measure.

[candymancan]

It has belts but i cut one off it was ao twisted and mangled.. and the others are done and twisted too.

Whats weird.. is this Jeep has one belt for the crank and fan. One belt for the fan to power steering. One belt for the power to air pump( dont need that i removed the air pump).. one belt for the crank fan and alt.. and another belt from the fan to a.c

It has like 4 diff belts. Not jist one big one for fan a.c alt. Or fan power steering.

I wonder if i still have my wagoneer belts to see if those will fit. Damn

[tgreese]

Look at page 2-19 in the TSM. You should have 4 belts, but the AC and alternator have dual pulleys.

[candymancan]

Yea i found some belts in autozone. Well see if they work

[candymancan]

Look at page 2-19 in the TSM. You should have 4 belts, but the AC and alternator have dual pulleys.

My alt has 1 pully. A.c has two. Power steering has two.. fan has three

[tgreese]

You could have aftermarket air. That tensioner is goofy. Looking at the book, that's what you have - "American Air."
It's dealer installed, usually at time of sale. Different from factory air.

The 3-groove pulleys on the crank and water pump would have come with the kit. Three belts. That PS belt is in the wrong groove. Looks like it interferes with the tensioner. Normally the PS is on the outer groove at the pump, and the inner groove is the air pump. You don't _have_ to go around the WP with the PS belt - you can go around the crank and tension with the PS pump. A single belt is enough to drive the WP. Then your outer belt could go around the crank, the AC and the tensioner.

Sorry, it's hard to be very confident without being there. Does not make perfect sense from here. There should be a combo of paths that lines up, powers and tensions all the accessories. The tensioner is in there because that that belt path does not have a way to tension the belt otherwise. Thus it can only go around some or all of the crank, WP, and AC - plus the tensioner.

[tgreese]

Looking at the book more, the belt for your alternator is a 3227690. Lots of options for that on RockAuto.

There should be two more belts. I found one - crank to PS to compressor, 8126196 - no listing under that number. It does tell you that there is a path that includes the crank and PS and compressor, likely the middle groove on the crank and WP. That leaves a path around the crank, AC and tensioner, and maybe the WP.

[tgreese]

Looking at the pulleys, there is a special crank pulley for American Air. The book says that Jeep used the same pulley on the WP for all FSJs in 1976, AC or not - not special to American Air. Apparently American Air does not use the outer two grooves on the WP pulley.

You could remove the idler pulley aka tensioner and not run the AC compressor for now. That would follow the drawing in the TSM for PS and no AC. PN 3227692 at 54" - lots shown at RockAuto.

[candymancan]

The belt i got fir the a.c does match the one i cut off in length from autozone. Maybe an inch or so ish shorter.. but its probly due to lack of stretching.

The idler pully is dry as hell lol.. unless there isa way to pack it with grease i wont bother with it. The a.c pully is good though. The alternator is 1 groove and it runs from the crank to wp to alt using the inner pully on the wp/crank.

Tbh i wish i knew what amperage this alt was. With a.c id assume its larger than the im guessing 37 amps i read these came with. When driving the ampmeter was slightly above the middle line before the 60. So i assume its probly just 40amps or close to it.

As for the a.c i did notice it looked diff than others i see online. Its standing up not laying sideways. And its wierd.. but the a.c rubber lines.. are on barbed fittings.. using hose clamps... Never seen that before lol. I wonder if it actually works if i refill it, i do have 1-2 cans of r12 left because i see no obvious leaks of oil anywhere on it.. but of course its been decades since it was on. And im missing the a.c vent plastic moulding under the steering column. But i do have the rest of it

At least thats how its routed right now. I couldnt find that one in the stores.

The one i found for the power steering seems to match in size though but its cut.. deeply somehow so i gatta return/swap it today.

Im removing the air pump here soon.. I broke off and welded all the injection tube holes. Probly gonna try to sell the pump and canister it came with as it seems good no noise. Maybe someone needs it

Thanks for all your help. Youre an insaine wealth of knowledge.

Tbh the a.c pully doesnt seem like it lines up at all on the water pump middle pully. And it lines up better with the wp outer pully.. but its still off just a hair.. Both inner and outer on this a.c dont line up very well with any groove on the wp. So im wondering.. Does it soley use the crank.. Then tensioner. Then a.c i dunno. . Its confusing as hell tbh.




Based on the rust on the pullies. It looks like my ac inner pully has never been used. Same with my water pump outer pully groove tbh.

If i put the power steering belt on the outer groove of the wp.. it would interfear with the a.c belt that seems to run from the crank/idler/a.c outer puller groove.

And this is probly why my alternator has 1 groove only as the middle wp groove is for my ps pump. Not for a 2nd alt belt

Amd i making sense here. The outer ps pully groove is for the air pump i think.


So to sum it up i think this is the belt routing on my truck.

Inner crank/inner wp/alt

Middle crank/ middle wp / ps

Outer crank/ idler pully/ a.c

[tgreese]

Kinda think you are right about the WP uppley and wrong about the AC pulley. Likely the AC has been run on a single belt for a long time, but the outer WP pulley lacked a belt from the factory and is not used for American Air. The factory AC uses the outer pulley, and a double pulley on the alternator.

That should work, though the AC may not be happy with a single belt. If it squeals when you run it, you might move the PS belt from the crank pulley to the empty AC pulley groove. I suspect that is the original config.

This is the Motorcraft alternator, used for two years on the V8s 1976-77. Jeep does not list by amps in the parts book or the TSM. Maybe in the sales literature, if you can find that. They usually offered a standard and HD alternator as an option. The aftermarket listings say 60 amps, but you have to skeptical of them - they have their own priorities. You can guess at the alternator output from the range on the ammeter. If it's +/- 60, then the listings are probably right. If it's +/- 30, the ammeter won't handle 60 amps charging.

Glad I could help.

[candymancan]

How does the ps get a belt then if the outer wp pully interfears with the crank belt going up to the idler and ac.

Its a wierd routing. Ill figure it out. For now just need ps and alt lol. With no rust at all on the inner a.c pully groove i really dont think it was ever used. Its weird.

[tgreese]

Not like this?

modAA.png

Turn the idler arm?

[candymancan]

That would require one really long v belt for the ps crank idler and a.c. but it would make sense. Currently the ps is on crank water pump.

Onky belt i have for the a.c is that red outlined one

Ill see what belt i can find

[tgreese]

It's the 8126196 part I listed above. Suggest you measure the belt path. Nobody will have a listing by application. Here's a Dayco lookup by length: https://na.daycoaftermarket.com/en/catalog/#v-belts

Your local parts store should help you. Tell them the story and they should let you exchange if your guess is too short or too long.

[devildog80]

Do not charge the AC to test for leaks. Pull a vacuum first, then make repairs as needed until you can hold vacuum, then charge.
I did find the suction line on my '84 GW had the barb fitting & hose clamp, but high pressure side is all factory crimp fittings.