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

   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#491  
Not really - the rotors I use do not have the parking brake drum surfaces. The red calipers are the service brakes. Room down there is very limited with the CV joints on the drive axles. I decided early on to skip using a parking brake and rely on the park feature of the automatic transmission.

20191206_105257.jpg
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #492  
Forgot the nature of your brake problem but if it's from inadequate pressure, maybe a simple hydraulic intensifier would help. Instead of the pressure going directly to the caliper, it goes to a larger hydraulic cylinder to step up the pressure. (Sorry if you'd considered this.) C6F0BB6F-3AF6-4EED-8ECC-F3B531EA7D5C.jpeg
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #493  
If the purpose is to showcase your skills as an engineer and your ability to configure electronics then by all means do it.

Myself personally I would look into utilizing a second caliper on the brake disc first.

Having a toy is fine but I want simplicity for reliability's sake when I would have the machine way out in the bush.

Those are my thoughts.

That along the lines of my first thought too. Given the quality of work on the machine so far I have no doubt you could accomplish it. But it seem pretty complex for a critical safety & operational system.

What's the PSI on a normal power steering pump? Could you just leverage something like that with a pretty well known reliability record & 2 manual valves? Leverage a brake booster & relatively standard braking system off a bigger truck?
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#494  
I looked into a power steering pump - as I recall, it is around 100 psi output. I think I need 0 to 1200 psi to effectively steer this on dry ground. Steering in snow was not a problem.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #495  
I looked into a power steering pump - as I recall, it is around 100 psi output. I think I need 0 to 1200 psi to effectively steer this on dry ground. Steering in snow was not a problem.
They can vary a fair bit. I think most are in the 700-1500psi range.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#496  
OK, the one I googled referred me to an old one. But a PSP is still just a pump and I need some device to spin it and then another device to adjust the pressure coming from it. The Toyota Echo I cannibalized did not have one.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #497  
Vacuum brake booster?
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #498  
Not really - the rotors I use do not have the parking brake drum surfaces. The red calipers are the service brakes. Room down there is very limited with the CV joints on the drive axles. I decided early on to skip using a parking brake and rely on the park feature of the automatic transmission.

View attachment 695862
How about you use both calipers for steering, and put a line lock in one of them for parking?
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone #499  
I think there is a way with the right hydraulic components to let the steering use both calipers on one side and the service brake use all 4.
 
   / My Senior design project - a "Swamp Thing" tracked vehicle clone
  • Thread Starter
#500  
I don't think there's enough volume in the current master cylinder (mc) to actuate two calipers. A larger mc with the vacuum booster may be an option. I don't plan to implement a parking brake.
 

Tractor & Equipment Auctions

JOHN DEERE 850J LGP DOZER (A50854)
JOHN DEERE 850J...
2021 Caterpillar 304E2 Mini Excavator (A50322)
2021 Caterpillar...
2023 BANDIT SG-75 STUMP GRINDER (A51242)
2023 BANDIT SG-75...
2013 INTERNATIONAL PAYSTAR DAY CAB ROAD TRACTOR (A51406)
2013 INTERNATIONAL...
New/Unused 20ft Farm Iron Gate (A48837)
New/Unused 20ft...
2020 Massey Ferguson 1840 Small Square Baler - High-Performance Hay Baler (A51039)
2020 Massey...
 
Top