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Partially seized wd45 motor

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John B. in WI

05-18-2004 08:13:36

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Last winter my trusty old folger can blew off muffler. Left me with quite a problem. seized pistons. Pullled tractor down driveway and they loosened up so I installed battery and after turning 2-3 times she seized up again. I tried penetrating oil and all kinds of other stuff but nothing worked. So off came the head. With a little coaxing I got about 1" movement on all pistons, but thats it. Only 1" up and down not a bit more.I have been hammering on this thing for days and it seems to be getting tighter. I can still get the 1" but that takes quite a few hits now. I put about 3 gallons of oil in pan thinking it might be main bearing stuck but that did't do it either. I also put about 1/4" of oil on top of all pistons hoping it will work through bvut it seems to be sitting there real nicely. I would really appreciate any and all ideas on how to get a full turn out of this motor as I neeed to get it working soon. Does anyone have any ideas why I only get the 1" travel and if so whatcan be done to fix. Thanks for all the help. John B.

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05-18-2004 13:43:26

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 Re: Partially seized wd45 motor in reply to John B. in WI, 05-18-2004 08:13:36  
I'd pull the oil pan to make sure the problem is the pistons and not the bearings or a bent rod or rods.If its the bearings would you really want to just break it free and try running it? Bearings are cheaper than cranks.

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dave of southwest michiga

05-18-2004 10:38:59

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 Re: Partially seized wd45 motor in reply to John B. in WI, 05-18-2004 08:13:36  
Hi John, I was readin' about you're dilemma and it reminded me of a problem I had with my little C a couple of years ago. I was out disking a field when she bucked a couple of times and stopped. I had to put her in neutral and drag her out of the field. I tried engaging the clutch when we were pulling her and there was no movement. The engine was frozen solid. I was really upset and had made up my mind I was gonna have to tear the motor down.

At some point, I pulled the starter, and, to my surprise, the motor spun free as a bird. It was the starter motor that had seized and the starter bendix never disengaged from the flywheel ring gear. I could get that 1" of movement out of the engine but no more. That motor had gotten so hot that the armature was burned to the field coils.

I'd take time to pull the starter and see if that will free it up. I know this sounds crazy, but it would sure be worth finding out it was nothing more than that.


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Dick L

05-18-2004 11:02:57

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 Re: Re: Partially seized wd45 motor in reply to dave of southwest michiga, 05-18-2004 10:38:59  
You could be correct. I have had the starter Lock up many times. Back in the early 1950's my grandfather had an IH H that locked up a lot. He would place it in 5th gear and rock the rear tire untill it would snap loose. If you have had this happen to you before, you would know it as when you hit the starter it will bind on the ring gear and when you hit the starter again it has a solid sound. Pulling the starter will free it up but on my Allis C that I pull, I use another tractor to rock it free.

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Tom W.

05-18-2004 18:35:24

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 Re: Re: Re: Partially seized wd45 motor in reply to Dick L, 05-18-2004 11:02:57  
I had the starter problem on my Massey Harris 22. The starter wedged and stuck the motor. I replaced the starter and the motor ran fine.

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05-18-2004 10:17:01

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 Re: Partially seized wd45 motor in reply to John B. in WI, 05-18-2004 08:13:36  
pour in some turpentine with the oil you put on top of the pistons it will pull the oil down around the pistons and if its going to come loose it will that way. If it doesn't you will probably have to pull the pistons

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Dick L

05-18-2004 08:52:40

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 Re: Partially seized wd45 motor in reply to John B. in WI, 05-18-2004 08:13:36  
If it were mine, and it aint, I would mark and remover all four rod caps. Find a maple or other good strong hard wood 1"X 2" and drive the pistons out the top. You will never know the extent of your problem untill you see where the bind is. If you have it clean of rust on top they should drive easy. With the pistons out you will be able to see if it is bearings.

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