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All Super A crank pully experts

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Hugh MacKay

03-26-2008 17:03:18

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Just a quick piece of advice needed. I've got the Mrs. talked into letting me warm the crank pulley in the oven. I know it's 350 degrees, but how long?

Should I have a back up in case it sticks 3/4 of the way on. I used Keith OR plan for a puller, worked very well Keith, thanks for sharing. I also have a piece of 1" x 2" bar 16" long I could use for his type push on device.

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Jim Becker

03-27-2008 06:57:09

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

The seal is probably made of Nitrile, which is generally good up to 250.

Link

Considering that the pulley is going to start cooling as soon as it is out of the oven (and even more so as soon as it contacts the crankshaft). Heating to 250(per oven control) should be plenty safe.

I haven't installed one in ???, so take this for what it is worth. I would screw a piece of all-thread into the crankshaft (gently bottomed in the hole). Have one or more large flat washers, nut and wrench lined up. Push the pulley on as far as it goes by hand, then run it the rest of the way with the nut on the all-thread.

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Glynn Moore

03-27-2008 05:18:32

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

Hugh, I did a SA crank pully recently-We heated it in my wife's oven @ approx. 200 degrees for
about 30 min--Took it to the tractor with gloves,
then started it on the crank, then tapped it to
proper place with a brass hammer.Done 2 in the past year without a problem---Take care-Glynn

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Hugh MacKay

03-27-2008 03:07:57

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

Thanks to all who responded, I think I'll stick with Keith's plan. I've examined my old seal and am convinced the initial damage happened as a result of heat. It maybe didn't leak for a lot of years, however last evening I cleaned it throughly, definitely been hot, some time in the past. I don't think engine heat will do what I'm seeing. I have to put it right in the lap of the last rebuilder, and he's fertilizing the daisy's.

I think one only wants that pulley as warm as his bare hands will stand.

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Keith-OR

03-26-2008 23:56:31

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

Hugh, if you use the bar and jack(hydralics) to install the pulley,ya don't need to preheat the pulley..You need 5/8 althread, and nuts to secure the althread and bar inplace so you don't have to hold a half dozen things at one time..lol

Oh be sure that the cover is loose as to center the seal on pulley, after you get the pulley pressed back on then tighten up cover bolts.

I made that complete setup for a friend last year, he has used it on 3 or for 123cc engine since..swears by it...

Good luck on the intallation

Keith & Shawn(Special Olympic Gold medal)

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Hugh MacKay

03-27-2008 02:49:23

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Re: All Super A crank pully experts in reply to Keith-OR, 03-26-2008 23:56:31

Keith: I think I'll stick with your plan. The puller worked super. I don't like the idea of as much as 350F and 450F of heat. I'm nervous that kind of heat will destroy the new seal. I can see having it as warm as one's bare hands will stand, but the way I have it figured that seal will stand about as much heat as my hands.

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AndrewFromNS

03-26-2008 20:33:19

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

TractorSam and I did this just recently with the new crank pulley for my SuperC. About 50-feet from the shop, theres a wood firepit. A somewhat squished soup can, full of some random clean oil Sam found around the shop and with the crank gear suspended in it, sat over the fire for probably 15 or 20 minutes. We fished it out, Sam grabbed it with his welding gloves and sprinted into the shop. The pulley slid most of the way on, and a tap with a hammer and a piece of wood caused it to slide right on and seat itself quite nicely. This weekend, with any luck, we'll be doing the same thing to the new Cam Gear, providing I can find a spare pot of suitable diameter.

AR

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ScottyHOMEy

03-26-2008 19:55:31

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

I put both of mine in a cold oven, then heated the whole works up to 450, and left it there for at least a half hour while I did other stuff related to the job.

As far as the backup? In neither case was the pulley as loose as, say, a ring gear going on, and actually took a little tapping with a soft hammer, but they went right on. Of course, I had the tractor as close to the house as I could get it, covered the hot pulley with towels, and ran like a bandit back to the tractor with it.

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tn terry t

03-26-2008 19:42:56

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

feller up the road works on heavy equipment he uses a torch and one of those infer-red{sp} thermometers ive seen him do from crank pulleys to $500 dollar dozer bearings and bushings

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rnicholas

03-26-2008 19:27:34

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

Let mine in the oven for an hour. Figured if it took that long to cook a pot roast then it would do for the pulley. Besides, I'd already broken one trying to get it on and I didnt' want to start over again. The man at the shop told me there was 10/1,000 difference between the diameter of the shaft and the bore of the pulley and that was a lot when it came to metal on metal.

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glennster

03-26-2008 17:59:08

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

hugh, i found that the deep fryer works real good for heating up pulleys and gears . set the temp on the oil (i like corn oil, just doin my part to keep grain prices up) to 350 , put the item in there for 15 minutes or so, and wha-laa!!! i pack the front seals real good with axle grease to keep from damaging the seal, then cool em off with a blow gun or wet rag. just dont let the misses see you with the deep fryer in the shop!!!!

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riverbend

03-26-2008 17:40:56

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Re: All Super A crank pully experts in reply to Hugh MacKay, 03-26-2008 17:03:18

Hugh,

I just installed the pulley on my Super C yesterday. I heated it on my woodstove until it would just start to melt the plactic bag the seal came in.

It pushed on most of the way and took a couple whacks with a block of wood and a two pound hammer to move it the rest of the way back.

I did not know what kind of temperature the seal would stand, so I wrapped it with a rag soaked in cold water to cool it down.

Greg

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P and R Pete

03-26-2008 17:51:58

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Re: All Super A crank pully experts in reply to riverbend, 03-26-2008 17:40:56

I have a '49 Super-A, (and I have a new-old crank, and dang if I haven't looked in it yet, as I'm still putting the innards together), but the original crank was THREADED in the pulley end, a 7/16" if I remember right. I threaded a bolt in, in which I had pinged a divot with a punch and a drill, and it was this divot onto which I put the point of the puller I used to get the pulley off in the first place. I was planning on using these threads and a bolt and a handful of washers, (along with a heated pulley) to PULL it on, rather than risk damaging the thrust bearing on the crank by banging it on.
Might be worth checking to see if yours is threaded.

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brian2

03-26-2008 18:18:37

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Re: All Super A crank pully experts in reply to P and R Pete, 03-26-2008 17:51:58

It"s been a couple of years since I put my pully on, I can"t remember how / if I heated it up (if I did, it was probably on a wood stove too) but one thing I do remember was not thinking I had put it on all the way. I can"t remember why I thought that, it could have been the space when I looked into the hole or whatever... anyways, just my tip to examine it to see how far on it will go etc.

my 2 cents.

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