Keep throwing power stearing belt Resolved

[74BlueFish]

Keep throwing the belt on the 440, new install,   belt has a slight alignment error  but very small.    Is any alignment error a probabe cause?

The belt is a 15460 duralast,  is that the right width? 

Tightened the belt pretty tight and it threw it when I  started it up and revved it, on the 2nd rev when I let off the belt was upside down.   It gets loose on the top of the rotation where it gets slack from the torque of the crank pulling it.

For the last few weeks it has stayed on when doing a test drive, today was a little longer.

I have a tie rod belt tension-er so I can get the belt tight,  I even thought it might be too tight and it thru the belt almost  immediately.

Since the belt came off it does have a little twist to it, could that be a problem?

Picture of belt flipped,  Flipped on 2nd rev in neutral



Picture of belt alignment,  pulley looks pretty parallel to the straight edge

[cudabob496]

with engine off, how much can you push down and pull up the belt at the central location between the pulleys?
1/2 inch max both ways for an alternator belt.

[cudabob496]

is belt fraying on one side? if so, too much out of alignment

[hooD]

I would try a different brand of belt.  I'm not sure about the quality of Autozone belts.

[Chryco Psycho]

Belt looks too narrow , junk now that is has rolled over a few times .
 try a better belt / brand , & go wider if you are using an 11 use a 13 or 15 if you are using a 13

[74BlueFish]

I'm using a 15     belt is a15460    46 inches long    do they make a wider belt than that?     

I had less than 1/2 inch defection and it came off.  Then tighten it and still came off right away if I revved it.   but the belt had come off previously and is no good as CP said.

The belt has some fraying on both sides but I might have flipped it around to inspect it.   

I have remade the bracket because of an alignment problem a few months ago.   The new alignment looks perfect when there is no tension.   When I tension it, it miss aligns a little.   I might have to re do it again

I will try a wider belt if they make one.   I have not driven the car much at all so I thought I had it fixed.

[solarguy]

Belt looks too narrow , junk now that is has rolled over a few times .
 try a better belt / brand , & go wider if you are using an 11 use a 13 or 15 if you are using a 13

   in your bottom pic, you can see that the belt doesn't fill the vee in the pully

[anlauto]

I would say if the belt has twisted/flipped like that several times.....time to get a new belt.

[734406pk]

I have similar set up as you do, and i'm running Gates belts on the A/C and power steering without any issues. Your belts look to narrow for this application. Here is some comparison specs between Gates and Autozone:

https://www.vbeltguys.com/products/9460-gates-oem-equivalent-cogged-automotive-v-belt?utm_source=googleshopping&utm_medium=cse&gclid=Cj0KEQjwuJu9BRDP_-HN9eXs1_UBEiQAlfW39q0akTXfGaOIeQFeEM8NY9K9lotD2AAF1VvLzR0cy00aAm1g8P8HAQ&variant=16051878339

https://www.vbeltguys.com/products/15460-autozone-oem-equivalent-cogged-automotive-v-belt?variant=15965835843

The Gates 9460 is .53" wide and the AZ 15460 is only .44" wide. The belts should fit flush to slightly above the outer edge of the pulley, so only the vee belt side section makes contact. If the belt is too narrow. the belt center section will be in contact with the pulley more than the vee section and the belt will roll. Your AC/alternator belts look a little narrow or worn as well IMO.

[74BlueFish]

O, k just ran out and got a new belt   Duralast 17460

It sits about an 1/8 above the pulley which looks too high,    Because it's higher it was too short so I couldn't install it.

The first belt was to narrow, top width .410
New belt too wide, .530

I will take 734406pk suggestion and get the 2nd belt he recommended that is .44 top width.

Going on vacation for a few days with the grandson and wife local here in Fort Lauderdale beach so I won't be able to get one and try it  till after I get back.

I will also try to get the wider alternator belts as well    they only have 150 miles.

Thanks,
Dan

[734406pk]

O, k just ran out and got a new belt   Duralast 17460

It sits about an 1/8 above the pulley which looks too high,    Because it's higher it was too short so I couldn't install it.

The first belt was to narrow, top width .410
New belt too wide, .530

I will take 734406pk suggestion and get the 2nd belt he recommended that is .44 top width.

Going on vacation for a few days with the grandson and wife local here in Fort Lauderdale beach so I won't be able to get one and try it  till after I get back.

I will also try to get the wider alternator belts as well    they only have 150 miles.

Thanks,
Dan

Hi Dan-
 The 17460 Autozone belt is the correct width but isn't long enough for your adjustment. You will want to try Autozone P/N 17470 or Gates 9470. They are 1" longer and hopefully in range of adjustment. Don't be concerned about the 1/8" , the belt will wear in quickly and drop down a little deeper in the pulley requiring a later adjustment.

[74BlueFish]

Ok , I'll try that   It looked too high to me but as you can see I don't know what I'm doing

Thanks

[734406pk]

Ok , I'll try that   It looked too high to me but as you can see I don't know what I'm doing

Thanks

You're doing fine! FYI, the last 3 digits in the belt part number is the length, so 17470= 47.0 nominal length, or outside circumference, same with Gates. the 17 in AZ and 9 in Gates is the width. Pick a length that is within your adjustment range.

[brads70]

Hard to tell from the pictures but is the pump held on in " single shear" maybe it is twisting under load?  Just thinking it out logically .... if the factory built them all double shear"  I'm guessing they did so for a reason as if they could have gotten away with single shear they would have to save money and weight?  I've build a few single shear set ups for circle track cars( power steering and alternator) but it was always on an engine plate ( super solid no way it would twist) the rest I've always build double shear....

My current pump setup on the 451 in the Challenger.
 

[74BlueFish]

That's beautiful.    My brackets aren't that stiff, but they are as big as I can go with my AC compressor where it is.  There are 2 brackets rear is 1/8 steel and front is 1/4 steel.  Is that what you meant by double shear?


I will try the wider belts and if still a problem, then a 3rd try at the brackets.

Dan