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Thread: 1947 Shorthood

  1. #1
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    1947 Shorthood

    Hey all! Decided to document my build, as I have found so much good information on this site, mostly from build threads, and sometimes all it takes is some random picture to solve whatever I'm working on. In any case, lets get started!

    I picked up this '47 shorthood up in Northern Illinois, and ended up driving back home on back roads to Eastern Kentucky like this:
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    Needless to say it took a while.... I know those wheels / tires aren't exactly made for high speed, but for the record they did just fine at 50mph for the ~400 miles I had to drive.

    In any case, I got it running up in Chicago, all it took was cleaning the main jet, and with a separate fuel bottle it started right up with only a few cranks! After I freed and cleaned the brush holders, I was able to weld no problem, so all that gave me the confidence to do a full rebuild. I'm really looking forward to prettying this machine up, going through it, and feeling confident about it working for a very long time.

    The machine is a hand crank only (no spot for a starter), the small exciter coils, and the chain drive adjuster. I saw on MotoMarks build that he was able to put a rheostat and remote on his machine that had small exciter coils, and I'll likely be trying to do the same, assuming it worked out okay for him. Now for the photo dump!
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    Last edited by coolbreeze; 08-11-2022 at 11:44 PM.

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  3. #2
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    Re: 1947 Shorthood

    A few photos to give a general overview:
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    The disassembly begins! I've never taken anything like this apart before, so it's a fun learning experience. It's nice that it's not very fragile... I used this setup to pop the cover free, and soon noticed that you have to take off 'exciter generator' in order for the cover to come off.
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    The motor honestly looked pretty good. Lots of corrosion in the coolant galleys, but from what I've read, you can run a white vinegar solution in the motor for a few hours, and once it's clean, neutralize it with a baking soda solution, then you're good to run coolant again. I used 5% white vinegar to clean the radiator already and it did quite a number. I'm not sure it got everything, but it definitely helped. I am happy about that, as the radiator looks to be original.

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    This leftover styrofoam is kinda nice for organizing parts hehe.
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    The last thing I got to do yesterday was pull the oil pan, and am glad I did. Lots of sludge on the oil filter screen and in the pan itself. I don't think I've ever actually seen true sludge before to be honest. Pretty cool. I've only rebuilt my toyota 22re in the truck pictured above, so working on this motor is really cool. Tomorrow we're floating the red river, but I hope to organize everything and clean all the parts I've taken off, and then likely borrow an engine hoist on saturday to pull the motor and armature. Stoked! My full gasket kit came in the mail from BWparts, and it looks pretty complete, though the 'no leak' rear seals are calling my name, as I am unfamiliar with these type of rope seals, so my confidence in a good installation is pretty low. They seem like cheap insurance for me, despite their price tag.
    Last edited by coolbreeze; 08-12-2022 at 12:02 AM.

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  5. #3
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    Re: 1947 Shorthood

    good, nice ur doin that. i dont know how fitting or respectful that is to have a classic american made machine like that hooked u to that import thing. but ill just tell myself ur restoration work/effort offset it, and maybe thats not the future perm setup. i like them old brick buildings
    Last edited by 123weld; 08-12-2022 at 11:30 PM.

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  7. #4
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    Re: 1947 Shorthood

    Haha I appreciate that! That truck has been a pretty fantastic workhorse, I've taken it cross country quite a few times, and had a lot of adventures in it. I'd love to eventually have a nice old welding truck to go with the welder, but for now I will have to make do with the old 4runner. Hoping to borrow a cherry picker and engine stand this week to get everything taken apart. Pics and updates soon!

  8. #5
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    Re: 1947 Shorthood

    I think your missing a piece on the front of radiator ? Will try to remember to take a picture of mine and send it

  9. #6
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    Re: 1947 Shorthood

    A little progress today, got the engine and armature out of the frame so I can easily do the seals, I broke down and ordered the no leak seals, because I knew I'd kick myself if I didn't.. Here's a few photos of the process.

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    Wasn't able to get a hoist, so I just used the beam in our building. We used it last winter to lift a 7.3 powerstroke, so I figure it'd be juuuuust fine with this assembly.

    Stator has some cracking in the insulation, I ordered the red insulation varnish that Moto Mike used on his stator, what prep work can I do to ensure it sticks? I'd love to clean it up with a powerwasher or something but that just sounds way too aggressive to me.
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    Then I got a surprise when I tried to separate the armature and engine....All the bolts on the fan are tacked in place...?? Madness. I didn't do a ton of research on separating the armature, but from what I did see, these were the next step. Unless anyone has any suggestions, I'll likely leave it on. I know it just looks like oily goop, but I cleaned it more and they're definitely welded.

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    Here the parts sit as I relax and have lunch. Weather is nice and cool here, so I'll probably go for a run and maybe start cleaning parts this evening.

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    I'm still really impressed how everything is coming apart, no stuck bolts, hardly even a stripped fastener, unless you count a few flathead screws. The inside of the motor looks pristine. I'm a little nervous about doing anything to the generator, but I'm learning a little more each day and gaining confidence.

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  11. #7
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    Re: 1947 Shorthood

    A few more little things..

    Water pump pulley feels good, feels like it's been greased regularly. Any other reasons to rebuild it? I was just going to paint it when I do the motor. Here's a pic of the number on it for future reference.

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    Got the manifold cleaned up, ready for paint and prep. The exhaust has a flange, as the pipe threads are burned out. The surface for the bolts was below the surface for the pipe flange, so exhaust would leak through those threads. I ground it down and made it flat via drawfiling, which was pretty pleasing to do. Theres a probably 1/16" pinhole drilled in the manifold on the 'floor' of the exhaust, where it looks like water or condensation could drip out. It's definitely drilled, as all of the surrounding metal is good. I was going to seal it, but it doesn't seem like a terrible idea to have it, and it ran fine before.
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  13. #8
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    Re: 1947 Shorthood

    Hey guys! Lots of progress, i'll post pics soon! Mostly painting and getting things totally taken apart. I bought the no leak seals, and want to separate the motor and armature for their installation, but am having trouble figuring out how. This armature / motor connection is the 'old style', so the video Duane has on youtube doesn't apply, and the ones BWparts have don't seem to apply either. I got the fan bolts off with a little help from an oscillating tool to cut the welded bolts, but removing the fan doesn't reveal any bolt holes on the big flywheel between the motor and armature. Does anyone have the procedure for this?

  14. #9
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    Re: 1947 Shorthood

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  15. #10
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    Re: 1947 Shorthood

    That is the piece you are missing off your radiator grill

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  17. #11
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    Re: 1947 Shorthood

    Thanks for the pic! I have some spare sheet metal and grate, I'll use your pic to help make one when I make a new radiator shroud!!

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  19. #12
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    Re: 1947 Shorthood

    Got the Generator separated from the engine, and I'm mostly making this post so that someone in the future will find this post via google, so I'm going to include all the keywords that I was searching below:

    1947 sa200 f162 shorthood (short hood) lord bushings generator engine separation code 671 chain drive hand crank

    Okay! Now that that's out of the way, it was very easy given a decent setup. I was able to move everything alone, but a few friends would help a lot. I carted the engine / genny under our pick point at the shop, wrapped the generator with a crane sling, and built something for two jacks to press against. The setup was from top to bottom:

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    1.the bearing nut
    2.two pieces of square tube that bear on the nut with plate between them for jacks to press
    3.two floor jacks
    4.wood blocks on the fan to give jacks a level surface
    5.fan
    6.wood between fan and flywheel (outer hunk of steel)

    Jack the generator end out of the flywheel until it's free!

    I called BW and the tech said he had only dealt with one, and his method was just to wiggle the heck out of it (the wiggle comes from the bushings) and it would come free. That IS an alternative but I felt like mine was very easy, albeit had some setup.

    Here are the pins that go into the bushings
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    My bushings seemed to look fine, not sure what I'd do if they didn't honestly
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    Last edited by coolbreeze; 3 Weeks Ago at 11:52 PM.

  20. #13
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    Re: 1947 Shorthood

    Some more pictures for your viewing pleasure! Here is how it stands at the moment. I'm working on the top still, so it should be done later this week. I know green really isn't the lincoln color but I didn't want to look like every other shorthood.

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    I like finding cool parts like this
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    Lastly, here was my method for tightening my pick point head nuts. a 6pt 10mm socket with a 10mm allen key in it. Not sure how much better it could get, but I'm open to suggestions
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    Here's a video of the first start after rebuild - The governor really is maladjusted, so it sent the RPMS waaaay high. Adjusting it is my next task. Anyone got any tips on adjusting it from scratch?

    https://youtube.com/shorts/KqruU6yTpRY?feature=share
    Last edited by coolbreeze; 3 Weeks Ago at 11:28 PM.

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