IMO pulley pullers are too much money for what they are, but you need them so I made my own.
I work in a machine shop so I can make one look pretty nice, but you can still do this with some simple tools that most people should have at their house.
Note: This is just how I made one, and it could of been made differently, but I'm just showing you what I did.
- 1 - CRS Plate - 3.875 x 4.375 x .625
- 1 - CRS Plate - 3.875 x 4.375 x .500
- 4 - 1/4-20 x 3 1/2 SHCS
- 1 - 5/8-11 x 3 1/2 SHCS
- 1 - 5/8 Washer
- 1 - 5/8-11 Nut
1)Get your material.(The hole in the one piece means nothing. Its just some scrape metal I found)
2)Lay out you hole locations, center punch them.(I forgot to layout the middle hole. I didn't actually center punch my holes as I charted them in a Mill, I was just showing an example)
3)Clamp the plates together, and drill through with a #7 drill on the outside holes, and a 41/64 drill on the center hole.(I used a mill, but you can use C-clamps and a hand drill. A drill press would be a great asset though)
4)I bored out the center of the plate that fits behind the pulley to get the radius right, but if you don't have the tools for this then go to the next step.
5)Going off the center line scribe you some lines to make you a slot 2.5" wide. If you couldn't do the above step then your going to have to cut/saw the radius out piece by piece. It doesn't have to be perfect or anything to get the job done. Just scribe some lines, and follow them, and cut it out in several pieces.
6)Tap the 1/4-20 holes in the plate that goes behind the pulley. On the plate that goes in front of the pulley drill open the #7 holes with a 9/32 drill bit.
7)Assemble it like is shown in the picture.
8)With it over the pulley like this put a wrench on the Hex nut and use a wrench on the screw and go to town. Be carefuls as the pulley is has quite a press on it and is very tight.
This I would change if I did it again.
-First I would make it about 1/4 to 3/8 wider. This should fit a stock pulley, but you will probably have to take the two bottom screws out and slip it over the pulley then screw them in. It measures about 3.640 between screw and you have to take into account the lips on the factory pulley. The factory pulley is 3.600".
-Second I would use 3/8-16 SHCS instead of 1/4-20 SHCS. Bigger = Stronger.
-Third I would use thicker material for the plate that goes behid the pulley. I bent the 1/2 one a little which makes the other plate not slide on the bolts as well as it should. Using 3 bolts in a triangle pattern might have also helped it not to bend.
-Fourth I would drill and tap a hold in the end of the 5/8-11 screw, and turn down, and mount a small piece of brass on the end of it.(You could probably also use aluminum. Just something softer than steel. Brass is tuffer than aluminum though, but its still soft)
I put a 1/4 washer between the shaft on the blower and the bolt, but it kind of tore threw the washer, and ate into the end of the shaft alittle bit messing up the threaded hole. I didn't know that until I had the pulley off. Like I said that things on there tight and takes some work to remove.(The Torn washer is sitting on top of the snot in the picture)
Here are some drawings I made.