My Senior design project - a "Swamp Thing" tracked vehicle clone

   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#41  
My engine hoist. I mated the engine to the tranny today. Next, I plan to design supports for the original engine mounts, which I thought I'd reuse.

20180713_142830.jpg
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#42  
Well, I got started welding up the tub frame today. Hopefully I'll get the wheels on it soon so I can move it around. Still need to do more work on the engine mounting brackets that support the rubber doughnuts...

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   / My Senior design project - a "Swamp Thing" tracked vehicle clone #43  
Just found this thread and I'm looking forward to following along. Thanks for the pics!!!
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #44  
Totally off topic but I lived in Binghamton and had a Deere 265 mower when I was a kid so I'll be watching this thread... this is going to be good. :laughing:
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#45  
Since its been raining more or less steady over the last few days, I have not been able to weld out the tub frame. I finished the support frame for the radiator and fan assembly instead:

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   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#47  
I've been working on the tub frame lately. I guess it's 80% done. I still need to add some bracing and reinforcement members to stiffen it up - it twists too much as is. The opening in the front is for a maintenance hatch to easily gain access to the steering brake calipers, pads and drive axles.

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   / My Senior design project - a "Swamp Thing" tracked vehicle clone #48  
You may have to add some removable braces. Awesome build. Keep the photos coming.
hugs, Brandi
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#49  
Not that much to report this week - I added some cab support/side frame stiffeners to the tub and finished the cover plate for the front steering brake hatchway. Here's the front diff and brakes mounted in place. You could easily pull the calipers out thru the opening for maintenance:

IMG_20180811_164306.jpgIMG_20180811_164251.jpg
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #50  
Nice! What's that differential with the brakes on it out of?
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#51  
What's that differential with the brakes on it out of?
-> a '96-'05 Rav4. Note that it is mounted upside down to get the drive sprockets to turn the proper direction. The rotors and brakes fit a Mitsubishi Lancer.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #52  
I saw it in the earlier pictures. What was involved to get the disks right up against it? That originally was shafts bolted on there out to the wheels, correct? Did you just remove them and slip the disks on? Very interesting. I like the location of those brakes. Makes for a lot of possibilities. Thanks again. :thumbsup:
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#53  
The discs are reversed and new holes were added so they would slip over the diff hub bolts. I looked around for a while before I found discs I liked. My needs were basically 10" OD max and the ID needed to be large enough to allow the axle flange to fit inside and bolt up to the diff flange.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #54  
Do you have pics of fabbing that (extremely) narrow differenial?
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #55  
The discs are reversed and new holes were added so they would slip over the diff hub bolts. I looked around for a while before I found discs I liked. My needs were basically 10" OD max and the ID needed to be large enough to allow the axle flange to fit inside and bolt up to the diff flange.

Nice. Thanks.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#56  
Do you have pics of fabbing that (extremely) narrow differential?
-> Not sure what you mean. I just built a mounting cage around the stock Rav4 diff.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #57  
You will need to plug your diff vent and drill a new one on the top side of the housing.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #58  
Do you have pics of fabbing that (extremely) narrow differenial?
-> Not sure what you mean. I just built a mounting cage around the stock Rav4 diff.
I suspect that airbiscut didn't catch that it was an IRS differential and thought that you narrowed the axle out of a solid axle vehicle.

Aaron Z
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #59  
I suspect that airbiscut didn't catch that it was an IRS differential and thought that you narrowed the axle out of a solid axle vehicle.

Aaron Z

You suspected correctly! Did you then have to fab an adapter to connect the differential output to the brake discs? What kind of coupler will you use for your axle, and will that go through a bearing mounted to the tub? Finally, do you roam an auto salvage yard to find just what you need?
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#60  
I just drilled new holes in the discs to fit the differential flange bolt pattern. I will use the OEM Rav4 axles (which will need to be shortened) as well as the OEM wheel hubs. The drive sprockets (shown in an earlier photo but w/o the teeth) will bolt up to the hubs. I did research on the internet to find what I needed. I have not been to the junkyard yet, but plan to soon to see if I can find more compact calipers for the service brake - these will also be added on the back side of the rotors.
 

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