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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

PS Pulley

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Old Jun 27, 2025 | 08:16 AM
  #31  
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Originally Posted by Heiferman
The pump on my truck is an STP-49-RM which shows to be on 1984 to 1998 trucks with various belt set ups. I believe the shaft is listed as .6875 or 11/16 (need to verify) so that leaves us looking at alignment and groove depth.
Being you have a van cut away is your PS pump a Ford or the GM type that was used in the vans?

When I bought my truck it had the GM type but my parts truck the Ford, I kept the GM and happy I did as I hear the Ford's like to make noise.
Dave ----

edit maybe I got your trucks mixed up and motors?
 
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Old Jun 27, 2025 | 08:28 AM
  #32  
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Originally Posted by FuzzFace2
Being you have a van cut away is your PS pump a Ford or the GM type that was used in the vans?

When I bought my truck it had the GM type but my parts truck the Ford, I kept the GM and happy I did as I hear the Ford's like to make noise.
Dave ----

edit maybe I got your trucks mixed up and motors?
This is for my "85 F150. It was squealing and leaking. The van is a 2000 and has a serpentine that is readily available.
'85 F150 = powerhouse 300 straight six
2000 Ambo E350 = 7.3

And I just struck out locally at wrecking yards. Gonna drive down to my closest U-Pull it. They have 4 contenders.

 
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Old Jun 27, 2025 | 09:37 AM
  #33  
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Here's the dia. on my 86 302EFI, no AC.



 
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Old Jul 8, 2025 | 06:20 PM
  #34  
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Been fighting with various pulley set ups all day. Managed to tear up two pulley puller/installers.
pretty sure the threads inside the shaft of rhe new pump are toast at this point.
I was able to obtain 4 different v belt pulleys from 4 differents sources. All a little different but all should fit the shaft as they were from trucks 80 to 86. All measure the same inner shaft. No success with any I tried. They will go on about 3/8 to 1/2 of the way and stop cold. The pump shafts are not tappered, nor are the pulleys inside as far as I can measure. Initially I figured it was the pulley installer. Now I am just shrugging and about to push the truck to the side yard. Pretty sure this how these trucks end up overgrown in the back of a property. So frustrating.
 
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Old Jul 8, 2025 | 07:48 PM
  #35  
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Have you taken your pump to the auto parts store or call them and see if they can swap the pulley. My NAPA changed pulley’s on the Alt.
 
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Old Jul 8, 2025 | 07:54 PM
  #36  
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Originally Posted by Heiferman
Been fighting with various pulley set ups all day. Managed to tear up two pulley puller/installers.
pretty sure the threads inside the shaft of rhe new pump are toast at this point.
I was able to obtain 4 different v belt pulleys from 4 differents sources. All a little different but all should fit the shaft as they were from trucks 80 to 86. All measure the same inner shaft. No success with any I tried. They will go on about 3/8 to 1/2 of the way and stop cold. The pump shafts are not tappered, nor are the pulleys inside as far as I can measure. Initially I figured it was the pulley installer. Now I am just shrugging and about to push the truck to the side yard. Pretty sure this how these trucks end up overgrown in the back of a property. So frustrating.
Take the pump and the pulley to a shop and pay them to put it on. You need someone with experience with this to tell what is wrong and get it on there. I have had some pulleys that were very tight, but it never stripped the threads anywhere. You do need to oil the installer tool, and a little bit of oil on the pulley shaft may not hurt either.
 
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Old Jul 8, 2025 | 08:07 PM
  #37  
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Thanks for the advice. Not my first rodeo. I have replaced pulleys before with very little difficulty. Everything lubed as it should be. I polished the insides of the pulleys to ensure no foreign matter was in there. (All are obviously used pulleys.) Pump is a reman. There is no visible damage to the shaft. Micrometers say it should fit.
I am going to get an upgraded install tool. The the bearings went out quick on the first chinesium puller/installer. It is certainly a mystery.
We don't have an autoparts store nearby here that will do anything like was suggested.
 
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Old Jul 8, 2025 | 09:52 PM
  #38  
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Originally Posted by Heiferman
Micrometers say it should fit...


I am going to get an upgraded install tool. The the bearings went out quick on the first chinesium puller/installer. It is certainly a mystery.
If the clearance is tight, use thermal expansion to your advantage. Stick the pump in the freezer for a few hours. Heat the pulley in a warm oven, maybe 150F or so. I've done this trick with bearings and it certainly helps.

For the puller/installer, spring for a Lisle 39000:

https://www.lislecorp.com/specialty-...-pulley-puller



Nothing else comes close. Definitely stay away from the HF offering. Most of their stuff is decent but that puller is junk.


This video shows the removal and installation process with the Lisle kit:

 
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Old Jul 9, 2025 | 11:45 AM
  #39  
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Originally Posted by kr98664
If the clearance is tight, use thermal expansion to your advantage. Stick the pump in the freezer for a few hours. Heat the pulley in a warm oven, maybe 150F or so. I've done this trick with bearings and it certainly helps.

For the puller/installer, spring for a Lisle 39000:

https://www.lislecorp.com/specialty-...-pulley-puller



Nothing else comes close. Definitely stay away from the HF offering. Most of their stuff is decent but that puller is junk.


This video shows the removal and installation process with the Lisle kit:

You Tube
Good advice. I went down a few rabbit holes and spoke to an ASE buddy last night who also recommended heat to about 200F or greater. I have a powdercoating oven that will do the trick. I will also give the inside of the pulley a heavier polish. This one had been spray painted inside and out and I had removed all that with a good polish prior to trying the install.

I was looking at different tools. All the HF and other universal China brands from $10 to $40 seem to be the same thing and I have been through several over the years. They are only worth what you pay. Last time I did this was with an HF tool on my 7.3. First tool broke the adapter piece off in the shaft. Looked like a manufacturing error. The second worked fine. Then, this time, I buggered the tool and pulley trying to get the pulley off the old screaming pump. There was considerable galling and rust on the end of the shaft and inside the tip of the pulley. It had not occured to me the pulleys for my application ('85 4x4 w dealer Sanden style AC) were NLA and so extremely rare. My AC is long gone.

I just ordered an OTC 7005 installer. I have heard they are pretty nice as the bearings can stand up to the job. But they are one specific size for each tool. 3/8-16 on the way.

I will end up with the Lisle you posted. No reason to keep dropping coin on cheap tools that seem to fail with every use. Even if you onlynuse them once a year. I like that Lisle sells the individual pieces to the kit on their site. That is pretty cool.

The tech behind all this is above.
Any pulley from any of the listed years and models should work if the pulley groove will align as they all had the same size shaft. Size is a minor consideration; my old pulley being 5 and 1/4". 5" will spin the pump a bit faster and 5 3/4 a bit slower. But since the pumps were all the same, those minor rpm changes should have little effect on operation, longevity or performance. Although belt width and length is a consideration, they are easy enough to address. The pulley I was attempting to apply was a double groove from an '83 and would have aligned easily and is the right width. Hint for a novice who gets this far, I learned years ago you may have to cheat the install on these press fit pulleys to ensure alignment. (Usually ensuring you do not press them on too far.) You may also need to pull a pulley back off a bit on one that comes pre-installed to ensure belt alignment. I have encountered that twice.

Anyway, thanks for reading and for sound advice. I have another project that needs some attention for a show this weekend. Not sure I will make it.

Edit: that exact Lisle tool is on Amazon. Free shipping. Half the price. Lisle has an Amazon store:
https://a.co/d/bNnh0kE
 
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Old Jul 9, 2025 | 02:25 PM
  #40  
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I would trust Lisle or OTC tools for anything I might need their tools for over anything else if I had the choice.
I thought OTC made tools for a lot of the OEM's?
Dave ----
 
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Old Jul 9, 2025 | 02:57 PM
  #41  
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Originally Posted by FuzzFace2
I would trust Lisle or OTC tools for anything I might need their tools for over anything else if I had the choice.
I thought OTC made tools for a lot of the OEM's?
Dave ----
Have to agree with Lisle, they have them hanging on the rack in my local NAPA. I have a KD Slide hammer and found this on the site,

https://www.toolsource.com/steering-...-p-110915.html
 
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Old Jul 11, 2025 | 12:06 PM
  #42  
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Wow. These came super fast. I thought they would not be here until Monday.
OTC and Lisle PS Pulley tools
OTC and Lisle PS Pulley tools
 
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Old Jul 16, 2025 | 06:37 PM
  #43  
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Alternatives to the E0TC-3D673-BA (NLA)

This is my solution at least temporarily:
The OEM pulley for my 4x4 '85 4.9L 300 w AC is the one mentioned often in this thread:
PN E0TZ 3A733-H marked E0TC 3D673-BA
single pulley measuring about 5.25 across with a 1/2 wide belt groove.

I obtained PN E0TZ 3A733-G marked E0TC 3D673-GA a single pulley measuring 5.75 across with a 9/16 belt groove.
I installed this one with ease with an OTC pulley installer. The pulley ended up being flush with the end of the PS pump shaft to align with the outter most waterpump pulley groove. It could have gone on further but would have been mis-aligned. (This is why taking your pump and pulley someplace to get it put on will not be a final solution AND depending on the length of your mounting bolts you may not be able to get them in place.) I am running a Gates 7535 belt measuring 13/32 x 54 1/8 because that is what I was able to get easily and quickly today. It is around the waterpump, crank and PS Pulley. It is a tiny bit too long (1/8 to 1/4 inch) and a bit too narrow for my liking but the new pump seems happy with it for now. One of you guys who wants to show how smart you are can tell everyone the speed differential between the 5.25 pulley and 5.75 pulley and we will all be very impressed.

Here are some other findings.
I obtained a double pulley marked E3TC-AA. I believe this to be PN E3TZ 3A733-A for an '88 E150/350 7.3 wo AC. It measured 5.75 across with two 9/16 grooves. I did not attempt to install this pulley. It looked like it would work and the pulley would seat backwards or forwards on the pulley shaft so it appears not tapered.

I obtained a double pulley marked E3TC-3D673-BA. This is part number E3TZ 3A733-B for a '83 to '86 F100/350 2wd 460. It measured 5.75 across and the pulley grooves were 7/16 wide (which is why I liked it - about the same as the NLA pulley). I attempted to install it as described above and discovered later it is actually tapered (it would not begin to seat if backwards like the rest of the pulleys) and that is why it would not fully seat. I mis-measured the inside outter edge so I was wrong to assume these would all fit the aforementioned pump.

Finally, I spent hard earned cash on the billet EVF pulley sold at their store and via Amazon. It measures 4 15/16 with a 13/32 pulley groove. It would start on either side so I am sure this will fit the application. It would have spun the pump a bit faster than the OEM and that would have been fine. However, it does not have the outter grooved neck to be able to remove it once installed and I could not find a suitable puller that would be able to get it off the pump in situ which means if it went on a little too far, aligning the grooves would be impossible without removing the pump and pressing it off the shaft with some difficulty then starting again. It is a nice pulley. I am going to work on a puller solution and consider swapping it in if I can figure that out.

So for those running the STP-49-RM pump, if you do not need a double pulley for a dealer installed AC of some flavor you have a couple alternatives that seem to do the job. I hope this helps somebody else.

Dang this Motorcraft pump is noisy.
 
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Old Jul 17, 2025 | 03:01 PM
  #44  
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The 5.75 inch pulley will turn the pump 9% slower compared to the 5.25 inch pulley on the pump. So pick any rpm, say 1000 rpm. Multiply 1000 x .09 = 90rpm slower. So with the larger pulley, it will be turning 910rpm instead of 1000 rpm. That is nothing to do with the crankshaft speed, just a pump speed comparison.
 
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Old Jul 17, 2025 | 03:31 PM
  #45  
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Originally Posted by Franklin2
The 5.75 inch pulley will turn the pump 9% slower compared to the 5.25 inch pulley on the pump. So pick any rpm, say 1000 rpm. Multiply 1000 x .09 = 90rpm slower. So with the larger pulley, it will be turning 910rpm instead of 1000 rpm. That is nothing to do with the crankshaft speed, just a pump speed comparison.
 
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