I continue to have the same problem with the AC belt bouncing. This time it got thrown off. No matter how tight I make it, it still bounces.
I tried finding the Ford number for it, but no luck yet. Parts guy helping has an '83. He works at the Ford dealer parts in Austin.
I've got one of my old belts and the Motorcraft #EOTE8620HIA doesn't cross. Getting it so tight worries me about the stress I'm putting on the compressor pulley. The belt that got thrown is a gaterback as opposed to a solid belt. Can't get a solid type anymore.
Just completely rebuilt my AC system and now this happens. Always something.....

Dave

 

Have you checked to make sure the pulleys are in line with each other?
There was a post showing belt routing for the six. IIRC there is an AC idler pulley the belt goes around do you have this pulley and is the bearing good?
Dave ----

 

You might consider a Power-Twist segmented belt.
They reduce harmonics and vibration.

The tighter you make your V-belt the higher the frequency it is going to vibrate at, just like a guitar.

 

Pulleys are pretty-much in line. I believe the problem is the new AC clutch. When engaged it makes a racket which might be the cause of the bounce. Have 5yr old clutch and will swap the new one for the old one and see what happens.
Thanks
Dave

 

Hmm.....I'm up for a little slack. Will try for a little slack and see what happens. I put one of the old AC belts on. It did a little better, but problem may be the clutch or a combo of the two.
Thanks

Dave
(Ithoughtthisprojectwasover)

 

Thinking hard about this bounce problem makes me believe the problem is the compressor. More racket than a clutch can make. New 4s compressor but who knows.
I've had a NOS York unit manf in 1975. I'm not sure anything can go wrong while it's been sitting/waiting to be used(?). The shaft turns ok, so I'll install a 5yr old clutch that I know is good and see how it goes. Luckily I have cut-offs on the compressor hoses and the SM has the procedure for clearing the compressor.
Maybe it will work...!

Dave

 

My truck does this as well with a dealer installed York compressor. My '78 mercury has the same style York compressor but I do not have the belt bounce with it. Same long run of belt between compressor and crank and this length is what bounces on my truck but doesn't on my mercury.

The only major difference between the two is I reinstalled a reman clutch on my '78 Mercury as it has a large balance weight on the back of the pulley that is set in rubber I believe like a harmonic balancer is where as my truck has just a new replacement style double groove pulley.

I personally have been thinking about when I have some spare cash to throw around buying a reman balancer style clutch assembly to swap on and see if this fixes my problem. Mine isn't the belt coming off I just hate the harmonic vibration that kicks in at just around 1400 rpm. Doesn't do it below or above 1400 just at 1400 when accelerating. I could live with it but this new belt isn't even a month old I installed and I already see strands of the backing cord already coming out as the vibration of the belt is destroying itself.

 

Thanks Rusty. Not sure my problem is cured as I just vac'ed the system. I tried getting the pulley better in line with the fan pulley. New green (farm equip) belt. Problem may have been faulty (20yr old) compressor cycling switch. It may have been the cause all the time....
Your post brings to mind some different clutches I've seen for the R210L. I've seen some with an 'inertia ring'. Don't know what that is or what the ring does. Anyone know?
Have also seen compressors for factory installed systems and dealer installed system. None of the parts guys can find out the difference is between the two compressors. Since the day I drove my truck off the dealers lot in 1981 I've been thinking I had a factory installed system, but now I wonder?
Later today I'll charge the system if vac continues to hold. May do one more evacuation tho. Hopefully the system will be back online tonight/tomorrow.

Dave

 

Well I know for a '82 like mine dealer systems used a York style compressor while factory systems used a FS6 style compressor.

Now I know on my '78 I just looked up the clutch with inertia ring and it says that will fit F150 trucks up to 1981. Thing is though that is for a Factory A/C system though as from my under standing 1981 was the last year for the York compressor to be used factory on trucks. It should in theory work on my '82 since it is running a York over the FS6 style compressor.

I do not know what the inertia ring is for but I believe it is to remove harmonics out of the compressor as these are a two cylinder design. My mercury has it and it doesn't vibrate the belt but my truck has a regular dealer ac double groove pulley and it vibrates.

Another thing is I don't know how they are assembled I believe they are like a rubber mounted balancer as I had one on my mercury slip and it slid back and started to rub the compressor mount. If this is the case this might be a cure for the belt vibration if you just have a regular double groove pulley.

More Information for FOUR SEASONS 48812

that is the one for a '78 Mercury Cougar with a 351 but it fits all York compressors though based off the fit guide they have. I might just break down and spend $113 and give it a go see if it helps.

 

Hmm.....wish I paid more attention to the OE compressor about the time it went out in '96. That clutch photo kinda rang a bell with me. It really looked familiar to me. Didn't have digital cameras back in those days tho.
I had hell finding an OE condenser and OE evaporator for my system. Found the evaporator at the local Ford dealer in Nixon, Tx. (nice drive down/back)
Had to send 2 evaps back because they came with 5/8" suction lines instead of the described ¾" line. Called 4S to find out what was going on and a nice guy in sales there finally found the problem. The 54527 number is correct but the evaps in the boxes is a different unit. Boxing mistake sometime back when they bought the company making them.
The only aftermarket condenser I could find is a Spectra brand. 6' too long and a serpentine design....very wrong. Lucky to find an OE part, still brand new in the huge Ford box.
If you decide to change the clutch I'd be interested to know the outcome. (Of course I might do the very same thing sooner)
Thanks for the help.
Dave

 

But we had Polaroid!®

 

I looked different places for the 48812 assembly, but none indicate it was ever on the L6 engine. Maybe I was going way back to my '67 Galaxie 500. Great car but lousy interior head room for me. I had it a long time tho, but traded it in on my new '81 F100.
Anyway, the AC system in my truck is up/running smooth and putting out low 40s° air. The belt(Ag Green) I bought is 1" shorter than the OE 17560 and it's not bouncing much at all.
Still don't know the difference in compressor fit between the '81 Fac AC and Deal AC.
Dave