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Got 1 piston out, 3 to go and more ?'s

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neblinc

05-30-2007 05:20:34

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Well one is out and I think I will figure out how to sneak a press purchase into the shop. The other three won't budge at all.

What are my options after I get these pistons out? I am confused by all the choices of engine kits on this site, flat head, stepped, with bearings, without.

Am I right that I am to replace the sleeve and pistons and not reuse the old ones? The bearing surfaces look pretty good with no marks or scores on them, do I reuse them?

Randy

1950 H Progress

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Andy Motteberg

05-30-2007 11:27:11

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

It usually works to soak them in brake fluid or PB Blaster for a while.

Good luck!

Andy.

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Tom Windsor

05-30-2007 11:05:37

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

If I had known in the beginning about the "secret hidden bolt" for the cam, I would not have broken the cam gear! You learn something new every day. Thanks for the posting of this particular item. BUT, at the time, I had not figured how to get the thing to turn cause the crank was frozen. Live and learn.

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Mike CA

05-30-2007 09:49:01

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

Randy, I'm far from experienced, but it would seem logical to me that if you are going to replace the pistons and sleeves, as it looks like you should... and you are going to work the tractor on your farm, like it looks like you will do, then I would say logically, NOW is the time to upgrade that engine to Super H specs for piston size and shape. I mean, when has more power from an engine ever been a bad thing??

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brainerd dave

05-31-2007 06:00:58

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Re: Got 1 piston out, 3 to go and more ?'s in reply to Mike CA, 05-30-2007 09:49:01

When you're paying for gas?

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Nat 2

05-30-2007 08:58:48

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

Another vote here to take it to a machine shop. They'll figure out the bearings for you, and then you can choose the pistons and sleeves you want. It's pretty common to install step-head "overbore" pistons and sleeves to bring the engine up to Super H specs, and not much more expensive than going straight back to stock, if any.

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Tom Windsor

05-30-2007 08:18:50

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

Well, I sorta convinced mine to come out by turning the block upside down, got a square block of oak wood and got a very large hammer. I think I would pour diesel fuel in the holes from top and set it on fire and let it burn out and heat it up. On mine, one or two came out, the other two, the sleeves and pistons came out in one piece.

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El Toro

05-30-2007 08:42:27

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Re: Got 1 piston out, 3 to go and more ?'s in reply to Tom Windsor, 05-30-2007 08:18:50

Tom, You can not beat the heat. Hal

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Tom Windsor

05-30-2007 08:18:40

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

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neblinc

05-30-2007 05:57:02

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

Thanks guys. maybe I will just take everything down to the machine shop and let them get the other 3 pistons out and do the rest of the work. That will save me from buying the $200 press ; )

Then all I would have to do is install the sleeves & pistons correct?

Randy

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glennster

05-30-2007 06:13:45

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:57:02

yup, have the machine shop press the rest of the pistons and sleeves out, it will save you the hassel, especially if you dont have a sleeve puller. when you go to install the new sleeves, either wipe the cylinder bores out with a scotchbrite pad, or LIGHTLY run the hone in and out a couple of times. the pistons and sleeves are usually matched, so keep each piston with the respective sleeve. when you are gonna install the sleeves, put them in the freezer overnight, then spray some kerosene in the cylinder bores, the sleeves should drop right in, lightly tap with a wood block. (dont use that big hammer ya got!!) be sure to clean the step at the top of the cylinder bore so the sleeve will go in all the way.

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RustyFarmall

05-30-2007 06:09:05

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:57:02

Randy, I have been looking at presses also, and the presses that are capable of pressing out stuck pistons will cost considerably more than $200, unless you are looking at a used one?

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neblinc

05-30-2007 06:21:38

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Re: Got 1 piston out, 3 to go and more ?'s in reply to RustyFarmall, 05-30-2007 06:09:05

Well Rusty, I a was looking at the cough, cough, Harbor Freight 20 ton that Tractor Vet reluctantly recommended. I saw it in one of their sale flyer's for $189. They will be having a sidewalk sale this weekend, so it might even be less. Also may be able to apply another 15% off coupon if I can find the darn thing.

Most of the stuff they sell is pure junk, but the engine stand I bought from them is not bad for the price I paid.

Randy

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RustyFarmall

05-30-2007 06:25:50

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 06:21:38

I hadn't even thought about Harbor Freight. Some of that stuff really isn't all that bad, but I'll never admit to it on a public forum.

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El Toro

05-30-2007 05:44:59

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

I wouldn't use the old pistons. I would have the block dipped and install new freeze plugs. Have the crankshaft measured and have it polished or ground undersize if needed. You would need to decide which pistons to purchase. I don't think it really makes that much difference. They had flathead pistons in them for years. It will run like new with a new sleeve and piston kit. If the valves are very thin I would replace them along with the guides and springs. Hal
PS: I wouldn't buy any bearings until you have the crank measured and your local auto machine shop can supply the correct bearings. When I did
a Farmall A the crankshaft looked terrible. My auto machine shop said it only needed polishing and it would need .002" undersize bearings on the rods and mains. They had the bearings too.

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RustyFarmall

05-30-2007 05:42:10

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

Those pistons can probably be salvaged, but seeing how the rings are imbedded into the grooves like they are, you would be ahead to just trash the pistons. Stepped head pistons will give more compression, resulting in more power, but the flat tops will work just fine. I would suggest that you buy an engine kit that contains sleeves, pistons, rings,piston pins, and gaskets. Take the crank shaft to a machine shop and have it measured. Even though it looks good, it may be slightly worn, and will require undersized bearings to achieve the proper clearances. The machine shop can get the correct bearings for you. You might want to bring the engine block to the machine shop also, and have new cam bearings installed.

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Allan In NE

05-30-2007 05:29:53

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Re: Got 1 piston out, 3 to go and more ?'s in reply to neblinc, 05-30-2007 05:20:34

Dunno Randy,

I learned a long time ago that if you're going to do a job, might as well take the time and spend the money to do it right.

New pistons/rings/pins/sleeves; new bearings on cam and crank and I'd sure use the stepped, higher compression pistons of the Super Hs. Just about doubles the power output.

Take the crank and the head to the machine shop for service. They'll check the crank journals for out-of-round and give it a good polish. Then, they will bring that head back to "like-new" condition.

Allan

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