Compressor pulley wrench

[Oerthedge21]

My compressor base gasket recently sprung quite an oil leak. Finally bought a new gasket and went to out it in, only to realize one if my compressor wrenches is gone, specifically the big square shaped one. Also noticed that my pulley is cracked in front where the bolts run through it. My question here is 1) can anyone give me the measurements for the wrench so I can make a new one? And 2) does anyone know of a place to get a new compressor pulley for a reasonable price? I checked a few sites but they wanted around 100$, which I thought was absurd, but I could be wrong. Are they really that valuable?

 

[cattlerepairman]

I looked and the first that came up was $60....Eastern....

 

[Floridianson]

I might have one just pay shipping. I will look as soon as I can.

 

[Slate]

I bought one a while back from C&C and the open end wrench spread out and was no use. I'll take get a pic in a few. The cross shaped wrench did well though. Wasn't too expensive. And shipping wasn't near easterns prices. They were just cut out of steel plate.

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[18operator]

Can the crack in the pulley be welded?

 

[gringeltaube]

can anyone give me the measurements for the wrench so I can make a new one?

compressor wrench size

Hi I am working on my M35 air compressor. I have the wrench that fits the front but i dont know what size goes on the back side to hold it. any help would be greatly helpful. Thank you.

www.steelsoldiers.com

Added real dimensions since that PDF is not exactly to scale...

 

[NDT]

Just use a crecent wrench on the shaft side and a pipe wrench on the pulley side, don’t need no stupid home made wrench for this.

 

[DavidWymore]

Just use a crescent wrench on the shaft side and a pipe wrench on the pulley side, don’t need no stupid home made wrench for this.

I agree, that's how I've done it when at the shop where I have big wrenches. I wanted something to keep in the truck for on the side of the road. I saw some for $25 and ordered...they are thin and I doubt would work. Haven't tested yet. I can measure if you want dims, and remake them at work thicker if there's interest for people who don't have big wrenches handy.

 

[DavidWymore]

I also probably have an extra pulley around if you want it (I wouldn't bother trying to weld the cast) but would have to ship from SoCal...

 

[Oerthedge21]

Yeah the pulley is cast and can't be welded. As for the wrenches I have the open ended one, it works great and I didn't have any issues with it stretching open at all. I suppose I could jam a pipe wrench in the front in place of the cross wrench, but making one could be a fun little project too, which was really the only reason I asked.

Floridianson, let me know about that wrench, I'll happily pay shipping if it's not too much.

Gringeltaube, I can measure the open end wrench for you when I get home later if you want the measurements of it

 

[frank8003]

I just used a "flat wrench"
Is it not 1-13/16"? or was it 2-13/16"/ I can't remember
Still have it someplace. That and Kroil and extensions and 9/16" and anyhow if you just loosen it and crank the engine it will get tighter. That is the design.
Like all loose but not even a wrench on it.

 

[Slate]

You can weld cast Iron by the way. But you have to heat up part and use specific rods. PITA. But it can be done. Easier to use a big wrench and a pipe wrench and get a new pully or half.

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[Oerthedge21]

Yeah I'm familiar with the process, and that's exactly why I'd rather just replace it, especially because it broke right where the hole is for the bolt so it would have to be machined as well and it would not be a cost effective solution.

Frank, is that actually how the tensioner works? I thought it had to be done by hand I had no idea it would tighten itself when loosened

 

[frank8003]

Mr. [the idea man on many things, ] Rustystud, had many posts on this subject.
I defer to those that of course know more than I, like just about everybody...............

So I searched back more than 20 pages and it was a couple of whiles ago. So I give up.
Anyhow, what direction is the compressor pulley going anyhow.

Loosen Her. Me thinks that this is all One needs to bring it into specs, tight wise I mean.

If she be loose than just crank engine, no start and check it to be good.
Me thinks design is to never come off. Why you got left handed nuts on your studs, anyhow. See Dodge inventions. Kroil is your friend.

No compressor pulley ever came off by itself. Lot of torque compressing air be required. No one ever found one loose.

 

[gringeltaube]

Anyhow, what direction is the compressor pulley going anyhow.

Assuming that is a question then the answer is: same as crankshaft, CW.

 

[gringeltaube]

Gringeltaube, I can measure the open end wrench for you when I get home later if you want the measurements of it

Thanks for the offer, but not necessary.
That hex on the backside is an odd size; exactly 45mm. So either you have a 1-13/16" open-end already, or take an old, worn 1-3/4" and grind it to fit, or be happy with a large crescent wrench, as NDT suggested.

Years ago I made me a custom wrench already, 46mm. Little play but good enough...