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Scale Model Dozer Ride On For My Son

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dozerbuilder01

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Jun 20, 2011
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Far Northwest Burbs of Chicago
Late Christmas present showed up yesterday.
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Worked on the linkage pieces a little more but jumped over to final weld the frame.
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And added the battery box too.
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R-132 Fan

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Nice work and you are making good progress with it. :thumbup:
Have you thought of doing a softbound book on the project showing everything step by step? If you have the CAD drawings on a CD in the book you probably could sell quite few copies and make some nice money off of your creativity.
 

geotek

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I have AutoCAD, if you ever want to take your cad file and make drawing sheets and don't have the time I'd be happy to help.
 
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dozerbuilder01

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Have you thought of doing a softbound book on the project showing everything step by step? If you have the CAD drawings on a CD in the book you probably could sell quite few copies and make some nice money off of your creativity.

I have. But I started to move away from new parts and since I'm using so many used parts, it made it hard to make something universal. And with my access to scrap steel would make it hard to have someone else build it for a decent price. I will finish this one and maybe I'll try to make it simpler. It would be nice to make money to buy even more tools but I really do this for fun.

Finally finished the linkage. Now I just need to sit in it to see where I want the handles to go.

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All hooked up for a test fit. Still need to weld in the pivot bracket and tubes.
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That is all for now. Thanks for looking.
 
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dozerbuilder01

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Moving a long a little slower. At least the way it looks. Been doing a lot of small stuff and jumping between different things.

Made a battery hold down and a negative frame post. Also mounting the starter solenoid. I wanted to try and start the engine (which I mounted the other day but no pictures).

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Since the engine was used, I wanted to make sure it ran. I got it from a guy down the street from my brother. He said it ran. Well, it didn't.

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A magnet had fallen off and jammed in the coil. So I'm waiting to hear back if the guy can give me more parts. My plan is to also order the belt and pulley so I can turn the transmissions too. I was able to run that mower that they came from before I took it apart but I still want to be able to run it sooner than later before I get too far. I'll just mount the wheels and tires and put a big caster wheel on front and run it around my driveway. Having used parts makes me nervous and think that I should have just spent the extra money to buy new. Oh well.
So in the meantime, I felt like working on some sheet metal. I made a test fuel tank (little narrower than it will be). I used 14 gauge. It's not exact but it's close enough for who it's for.

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dozerbuilder01

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Been a busy few weeks with birthdays but I did manage to get a few things done.

Since I mounted the transmissions 5 inches closer together, the oil filters won't work since the center sections are the same. It's only the outputs that flip which means the oil filters point the same way.

A little hard to see in this picture.
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I know the bottom hole is pretty close to the edge. I used some scraps of steel and it's what I had.

And my mom finished up the arm rests.
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Also got the engine fixed up and it runs.

That is all for now.
 
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white500xl

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Jan 16, 2009
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Wow! What a neat project! Your fabrication and welding skills are fantastic! I can't wait to see more! Do you think it will be strong enough to push around a little dirt? I guess you could play around with some gearing to develop enough torque? Keep up the great work!!
 

rkevins

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this is very cool, can I play with it ?? are you going to but a cutting edge on the blade? there is a company repurposed materials inc. that has plastic blade edges used from snow equipment.
 
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dozerbuilder01

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I have. The guy did a nice job. Only thing I didn't like is how short the track length is. My son is already off the charts on height (my wife and I are both fairly tall) so I didn't want him to out grow it too quickly.

Wow! What a neat project! Your fabrication and welding skills are fantastic! I can't wait to see more! Do you think it will be strong enough to push around a little dirt? I guess you could play around with some gearing to develop enough torque? Keep up the great work!!

I think it will be. I don't expect it to be a full on dozer even though sometimes I wanted it to be as I was designing it. The main goal is for my son to just play around on it.

this is very cool, can I play with it ?? are you going to but a cutting edge on the blade? there is a company repurposed materials inc. that has plastic blade edges used from snow equipment.

Depends on how big you are. I made the seat just big enough for me to sit in it.

And I probably will. I don't want to ruin my driveway. The blade will be the last thing I'll work on.

So time for a little update.

At little off course but I felt like jumping to something else. If you look on the first page, the scale model has a grill. I was going to use 1/8" x 1/2" steel strips to make my grill and I wanted the twist that I've seen in some real pictures.

So I have a piece of steel I sliced in half on the band saw (wasn't perfect) and cut a 1/2" wide slot.
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I welded the two halves back together. Then I mounted it in the lathe and started turning it down.
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Finished it with a hole for a rod to twist the piece.
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This is the base. I milled a slot to align the bar stock. Didn't take too many pictures. I also used another piece of tube for a stop.
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Finished product.
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May seem like a waste of time. Could have probably done them by hand in a vise but I like the consistency of the tool which give it a nicer look. And lets me practice on the lathe which I'm not as good at.

Now, back to the main frame.

I need to support the outer ends of the transmissions.
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This is with the frame upside down.
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Picked up fittings and hose to run to the remote oil filters since I couldn't keep the factory set up.
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Also worked on the design a little more. Tried to finish up the body panels for mounting the tank and the foot well area. And I wanted to see what it would look like in grey (like a model 15).
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That is all for now.
 
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dozerbuilder01

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I originally bought pulleys for flat belts (since I needed them to ride on the backside of the v-belt). They were a little wide and they are crowned in the center. So they didn't quite work how I wanted. So I had to make my own. Out of some scrap of course.

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Started on the fuel tank. It's shorter than I want. Oh well. I'll sleep on it before I work on it any further.
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And got the handles tack welded.
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There really is a lot of **** in a small space.
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geotek

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Oct 4, 2011
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Wow, I gotta say I'm again impressed. Making your own pulley's is a stroke of genious. I wish I had though of it for my snow blower with discontinued parts. But since you though of it first I'm going to copy it. lol. Keep up the great work. BTW amazing attention to detail on that seat.
 
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dozerbuilder01

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I've been playing around with sheet metal lately. Way back, I first showed a trial of the fuel/oil tank. It was too straight. I wanted the top to have a little crown to it. Then the second tank I made, it was too short. I can't help it. I'm picky and I want things a certain way.

So this time, I used a digital angle finder and a little gauge. So I'd bend the center to 7 degrees then the outer edges (using the gauge to get the distance from the center even) to 68 degrees. If you notice that doesn't add up, it's because when I put the piece on the table between two clamped pieces of steel spaced 16 inches apart, I get a real nice, and consistent crown. It worked really well.

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http://i775.photobucket.com/albums/yy38/moo2121/DSC06689.jpg[/IMG

[IMG]http://i775.photobucket.com/albums/yy38/moo2121/DSC06690-1.jpg

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Here is the fuel/oil tank with one end welded on as well as the front grill surround.

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When I laid them on top of each other, they matched up perfectly. I was very happy with they way they turned out this time. And when I mean this time, it wasn't without some failures before I used the angle finder and gauge. Good thing I have a bunch of scrap panels.

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However, the next problem I ran into was the hood. I'm using 14 gauge sheet. It was free and nice and heavy duty. The tank was 7 inches wide and the grill is 4 inches wide. It bent fine. The hood....it's 19 inches long. And my bender just wasn't having any of that. I tried a few different things and it just wasn't working. And even if I got the bends, I still probably wouldn't be able to bow it to get that nice crown. I think I'm going to have to try something thinner. I'll go to Menards tomorrow to see if I can find a decent sheet of 18 gauge that I can try out.

As for the sprockets and idler wheels, I'm still waiting on the guy that's going to burn them out. He ordered a hi-def plasma cutter for his shop back in January. It's been delayed a few times but it's supposed to be in by June. I want it to be a nice cut and supposedly hi-def plasma cutters are close to laser. So I'm on hold until then.
 
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dozerbuilder01

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I worked on more sheet metal. Got the side pieces done that also hold the fuel tank.

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Also made a cross brace that will keep everything together and support the tank. It ended up being real strong.

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And I made another tool. Of course. I needed to make brackets that hold the tank similar to the real thing.

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And I ended up trying to make the hood out of 14 gauge. Too lazy to go to the metal store (since it's a pain in the *** because they close so early). Since my bender doesn't like long lengths, I cut it up into 3 sections.

Overall, considering what I'm using, it lined up pretty well. I was only off by maybe a 1/16". I'll live with that. My Dad did bodywork a long time ago and still does from time to time. So it won't be a problem to finish it to make it perfect.

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And I couldn't resist to put it all together to see what it would look like.
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machine_punk

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Napa Valley, California
Wow! that's really starting to come together. Looking great! I like the way you build your own tooling to 'get it done.' I think I've decided that is the reason I want to get a welder...not necessarily for 'fastening things,' since I primarily use aluminum rivets for that, but to build tooling to fabricate special pieces.

M_P
 

Omphaloskeptic

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Ultima Ratio, Wa.
The dozer is really coming together, and coming together well! Looking back at the picture of the 'Model 22', you are really getting yours to be its little brother.

You may have mentioned this already, but what CAD program are you using for modeling?

What do you do for seam sealing in the gas tank? I thought that tank seams had to be almost a continuous weld bead to insure against tiny pinhole leaks?
 

SuperSocket

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If this isn't a testament of love then I don't know what is.... wow. That is a lot of work.


Btw, nice flippies that you work in. lol
 
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dozerbuilder01

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Far Northwest Burbs of Chicago
Wow! that's really starting to come together. Looking great! I like the way you build your own tooling to 'get it done.' I think I've decided that is the reason I want to get a welder...not necessarily for 'fastening things,' since I primarily use aluminum rivets for that, but to build tooling to fabricate special pieces.

Thanks. I built another tool (you'll see it below). I can't help it. I dig the new 3 in 1 combo you bought. You definitely got a steal on that thing.

You may have mentioned this already, but what CAD program are you using for modeling?

What do you do for seam sealing in the gas tank? I thought that tank seams had to be almost a continuous weld bead to insure against tiny pinhole leaks?

I use Autodesk Inventor. It's what I learned in school.

I didn't want to do continuous welds to keep warping down. I plan to use the stuff from Caswell. I hear motorcycle guys use it a lot to seal their fuel tanks.

Btw, nice flippies that you work in. lol

Ha! I was wondering who was going to catch that. I do it because it's easy to flip them off (get it) when I go into the house. Then I don't track in metal shavings and dirt. And I'm too impatient to put on real shoes. Knock on wood haven't lost a toe yet.

And thank you all for looking. Now on to the update. Been tough lately with a friends wedding. Bachelor party, rehearsal dinner and wedding. And also mothers day. Not much time left to work. But here goes.

Been working on the grill. Here is what I'm using as reference.
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My brother has a wider brake at his house that we built together. Needed it to bend the lower portion.

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Then I clamped everything down to keep from warping too badly.
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I had to mount it up. Still need to grind the corners like I did to the tank.
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I wanted to use some 1/2" square tubing for the "frame" around the grill. I tried a simple set up but it didn't work. So I had to get more elaborate. I needed to make my own die. Luckily, I had a piece of scrap that worked just right.

I used a chuck that I had to hold it. It's not a rotary table so I would make a pass with a 1/2" cutter then rotate 15 degrees. Cut, repeat. Then I chucked it in the lathe to clean it up a bit which a crappy parting tool. Not the best but it works.

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Here is the final set up.
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Now you may notice two dies. I made one for 1/2" radius and another for a 1" radius. I'm doing a two tiered frame to get the extra inch width I'm looking for. I bought a 12" square piece of wire mesh and didn't feel like paying a lot more for a 2'x2' just to cut out 13" square. I'm picky. 14" square to the edge of the tube is what I wanted. So it's what I did.

The 1" radius die worked great. The 1/2" not so much. First bend was nice. The next 12 kept tearing the steel. I ended up getting 4 corners and I just had to piece that frame together. Live and learn.

Here is the outer frame.
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I got all of the frames tacked together and called it a night. I was anxious to see how it all looked so I taped it together. It looks like **** in the pictures but it will hopefully look better when I'm done. Might be all the glare.

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That is all. Thanks for looking.
 
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