Broken off crank handel

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Bernieboy66
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Broken off crank handel

Postby Bernieboy66 » Mon Oct 28, 2019 8:14 am

Well Thanks for the add to start, yesterday I finally got my wifes grandfathes 1948 cub. Unfortunately its been outside and the can blew off the exhaust and water got in and I believe it froze it up ,I broke the crank handel off trying to crank it over and the piece is still stuck inside.I imeadeatly put marvel mystery oil in the cylinders but now I don't know where to start for further disassembly help. Its all original and in real darn nice shape as it was always under cover and always on the same farm. Thanks for any help.....Bernie Farmington,N.H.

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Don McCombs
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Re: Broken off crank handel

Postby Don McCombs » Mon Oct 28, 2019 9:14 am

Try a long retrieval magnet to get the broken crank out.
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Mike in Louisiana
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Re: Broken off crank handel

Postby Mike in Louisiana » Mon Oct 28, 2019 9:28 am

Welcome to the forum. There are plenty of threads on here on how to get the engine un stuck. Just use the search and you should find the info. Just have patience and let the penetrating oil’s do their thing. It may be stuck valves or piston rings.
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and a lot of that comes from bad judgment. Will Rogers

tst
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Re: Broken off crank handel

Postby tst » Mon Oct 28, 2019 10:52 am

welcome to the forum, if you broke the crank handle you must be strong! the engine must be stuck good, take the starter out and try turning the engine backwards with a pry bar on the flywheel, if it moves you know it has rust in the cylinder stopping the engine from turning, how long has it been sitting?

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Re: Broken off crank handel

Postby Waif » Mon Oct 28, 2019 12:02 pm

Your crank engages the pully by fitting under "ears" that are designed to be snug when crank is turned clockwise.
Turning the crank counter clockwise loosens the fit. (Similar to engine firing and pulley spin throwing crank out of fitment position.)

IF the is enough shaft left on the broken crank to turn you have a chance.
The cross piece/pin through end of crank could be bent and wedged though.

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lowgearfarm
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Re: Broken off crank handel

Postby lowgearfarm » Mon Oct 28, 2019 12:51 pm

Bernie - I can't offer better technical advice than what you'll get here on the forum, but I am "just up the road" from you in Sandwich, NH with a '49er. Don't know how my proximity will help un-seize your engine, but perhaps your '48 will feel less alone knowing that there are other FCubs living in the area. They say that strong social bonds help restore health.
~Ned

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Re: Broken off crank handel

Postby Nelson 634 » Mon Oct 28, 2019 1:09 pm

Describe the broken handle. Where did it break? Can any part of it be seen? Look between the radiator and crank pulley, can you see the handle rod? Pictures would help a lot.
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Re: Broken off crank handel

Postby outdoors4evr » Tue Oct 29, 2019 7:53 am

I would think worst case you could drill the end of the crank handle with left handed drill bit and it would probably fall out during the drilling process.
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Glen
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Re: Broken off crank handel

Postby Glen » Tue Oct 29, 2019 10:57 pm

Hi,
I would use a light and look in at the front crankshaft pulley, from the right side. If the piece of the crank is where it goes into the front crankshaft pulley, it should be loose in the hole, usually cranks are loose fitting in the long hole in the front of the Cub.
Use pliers on the piece of the crank if it is tight, and turn it back and forth, and loosen it up.
A strong wire or something, used from by the pulley, pushing forward, should push it out the front of the hole, if you align the crank pin with the shape of the hole. :)

Bernieboy66
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Re: Broken off crank handel

Postby Bernieboy66 » Thu Nov 07, 2019 1:42 pm

Thanks all, The old crank broke at the dowel pin and I have gotten the broken piece out. currently torn down but pistons and valves are stuck. Im trying different solvents and its only been a week. Ive tried a new crank and tried rocking in 3rdgear.guess ill try to be more patient before I dare remove lower rod caps. lots of great help here so I guess Ill stick with it and keep the faith !!!

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Re: Broken off crank handel

Postby outdoors4evr » Fri Nov 08, 2019 6:28 am

Probably better off to pull the head off and put a wood block on the top of the piston and tap on it with a small sledge hammer. Put a rag over it to minimize the splashing.
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