Engine rebuild 1949 Cub.

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Flyboy
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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Fri Oct 23, 2015 3:54 pm

Thanks all. I couldn't find a left handed #44, but was able to get a rt handed 44. I put a couple pounds of force on it by hand and the lower section slide right out. The lower piece was 1 5/8" long. The upper piece was just the threaded section; about an 1/8" long, and it too came out with little effort. I pushed on the right handed bit while twisting counter clockwise and was able to get it to turn easily. I guess today was my lucky day. Thanks for all the help.

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Don McCombs
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Re: Engine rebuild 1949 Cub.

Postby Don McCombs » Fri Oct 23, 2015 4:41 pm

Flyboy wrote: I guess today was my lucky day.

Indeed! :D
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Flyboy
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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Fri Oct 23, 2015 6:22 pm

Carburetor rebuild complete. Running great. Next question. I am running with no electric system connected. Jumpers from battery to starter is my electric system. I have a generator for the tractor, but did not mount it since I need to get a new wiring harness. Can I mount the generator and leave it disconnected, or is that harmful not to have it tied in with the battery?

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Re: Engine rebuild 1949 Cub.

Postby danovercash » Fri Oct 23, 2015 7:05 pm

It needs a battery!
"I'd rather be a mechanic in the shop"- Henry Ford

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Fri Oct 23, 2015 7:10 pm

Ok. Thanks.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Oct 24, 2015 10:07 am

Just killing time until I have to go into town, I was reading about magnetos. The original magneto had a nice snap to it when rotated by hand, but produced no spark. The replacement mag, produces a spark, but not every time it is supposed to when cranking the starter. It does not have the nice snap to it when rotated by hand. So with my newfound knowledge about magnetos from this morning, I am going to wager a guess that the impulse coupling is not working.

I was looking through the PDF list and didn't see any specifically for the mag. I did find an exploded view on the web, but I would like to service the original and reinstall it on my cub. If there a service manual for the J4 somewhere? If so, can someone link it to me in this thread?

Thanks.

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Re: Engine rebuild 1949 Cub.

Postby danovercash » Sat Oct 24, 2015 11:07 am

When turning mag always have a place for the spark to go otherwise you may damage the magneto.
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staninlowerAL
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Re: Engine rebuild 1949 Cub.

Postby staninlowerAL » Sat Oct 24, 2015 8:58 pm

Flyboy wrote:I was looking through the PDF list and didn't see any specifically for the mag. I did find an exploded view on the web, but I would like to service the original and reinstall it on my cub. If there a service manual for the J4 somewhere? If so, can someone link it to me in this thread? Thanks.

GSS 1012 Electrical Equipment has the inspection and servicing information for the J4 mag. PDF MANUALS at the top of this page. Try this link: http://www.farmallcub.com/[ Sorry, direct links to manual section is not allowed. ]/downloa ... -27-55.pdf Stan

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Oct 24, 2015 9:35 pm

Thanks Stan. I will use your link.

At the risk of sounding like a moron, I am not seeing it. I click on PDF Manuals (right after classifieds) at the top of this page. It then opens into a vertical list of available manuals. How many lines down does it appear? Would using an IPad change the way the list is displayed?

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Re: Engine rebuild 1949 Cub.

Postby Eugene » Sat Oct 24, 2015 9:57 pm

I clicked on the link Stan provided and GSS 1012 down loaded.
I have an excuse. CRS.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Oct 24, 2015 10:16 pm

Poor writing on my part. The link worked fine. I always try to find stuff in the PDF section before I ask on the forum. After he sent me the link, I went to try to find it under electrical and still couldn't.

The links provided by everyone always work. I would just like to be able to find stuff on my own.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sat Oct 24, 2015 11:13 pm

Neighbor came over with fancy timing light to help me time the engine. At low RPM, everything worked fine. Once the engine got over 1000 RPM, the advance would not go beyond 10 BTDC. At least she is running well. I can deal with that later in the winter when all of my outdoor work is done.

staninlowerAL
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Circle of Safety: Y
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Re: Engine rebuild 1949 Cub.

Postby staninlowerAL » Sun Oct 25, 2015 8:28 am

Flyboy wrote:Poor writing on my part. The link worked fine. I always try to find stuff in the PDF section before I ask on the forum. After he sent me the link, I went to try to find it under electrical and still couldn't.

The links provided by everyone always work. I would just like to be able to find stuff on my own.

This one is buried a little deeper in the list. From PDF Manuals, scroll to the bottom of the list to SERVICE MANUALS, then select the BLUE RIBBON SERVICE MANUALS you should get the list. BTW the parts manual TC37F should give you a complete parts list with schematic showing how it all goes together.

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Re: Engine rebuild 1949 Cub.

Postby Flyboy » Sun Oct 25, 2015 9:02 am

Someone earlier said it takes a couple special tools for disassembly or I risk damaging parts. What tools are necessary?

staninlowerAL
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Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: Engine rebuild 1949 Cub.

Postby staninlowerAL » Sun Oct 25, 2015 7:33 pm

Flyboy wrote:Someone earlier said it takes a couple special tools for disassembly or I risk damaging parts. What tools are necessary?


I asked the same question a few weeks ago and got this reply from Rick Spivey. Maybe this is what you are looking for: "You will need one special tool, the impulse coupling puller. Earl was making them at one time, I strongly suggest purchasing one. I ruined an pulse coupling plate with a jaw puller, and they don't make those anymore." I've not done this before but Rick is highly recommended. Stan


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