78 D200 “D-RANGED”

[sjoemie himself 2,918]

3 hours ago, 19richie66 said:

Got the rear end in.

Newb question here.. is that a stock WH rearend?

[19richie66 16,942]

11 minutes ago, sjoemie himself said:

Newb question here.. is that a stock WH rearend?

Came out of a Panzer. It’s a narrowed 50’s Chrysler car axle.

[953 nut 51,699]

4 hours ago, 19richie66 said:

I’ll cut the whole tail end off and weld in some stronger box tubing.

Z the frame, old school way to lower a car frame. 

[19richie66 16,942]

I’m putting Skittles back tires/wheels on it for fit up as I have another set that I will eventually use when I find some more wheels. Just want the frame to sit level as it does normally. I’ll adjust the height accordingly. Thanks for the idea. 👍

Edited December 18, 2022 by 19richie66

[19richie66 16,942]

Stole Skittles rear tires and put them on here with. 2” wheel spacer. Enough room behind the wheel to hopefully run disc brakes. Also found the frame cracked in two places. Cut out the cylinder mounting plate and will make a new one later. Welded in two 24” flat steel plates which I will fully weld in after all the figuring is done. Also trimmed up the side plates for a test fit. Not too bad. Looks like a pto sticking out. Once the foot plates are on it will look better. Time to fit the transmission. 

 

 

 

 

Edited December 18, 2022 by 19richie66

[19richie66 16,942]

@8ntruck alright math master 😁…… say I make a coupler that links the two transmissions together to where there is no chain driving the 3 speed. So then I can run a chain off the back of the 3 speed transmission down to the rear end. Now what are my possibilities? 

[8ntruck 6,376]

@19richie66 it depends what chain sprocket ratio you use between the output of the second transmission and the rear axle.

 

Assuming a full speed input into the 3 speed transmission, the output speeds of the 3 speed transmission will be:

 

1st gear - 531 rpm

2nd gear -  708 rpm

3rd gear - 1700 rpm

 

Assuming a direct drive (1:1 chain ratio) from the 3 speed transmission to the 4.10 rear axle, the axle speeds will be:

 

1st gear -  129 rpm

2nd gear - 172 rpm

3rd gear - 414 rpm

 

Assuming 27" tires, road speed would be:

 

1st gear - 9.8 mph

2nd gear - 13 mph

3rd gear - 31.5 mph !

 

Putting a 2:1 chain reduction would cut the road speeds in half.

Using a 3:1 chain reduction would cut the road speed to 1/3 direct drive.

Using a 4:1 chain reduction would cut the road speed to 1/4 direct drive.

 

Depending on what you plan on using this tractor for, I think somewhere a 2:1 and a 3.5:1 reduction ratio would be good.  This would give you a 'creeper' 1st gear, a mower friendly 2nd gear, and a 'catch me if you can' 3rd gear.

 

Changing the chain reduction between the 3 speed transmission and the axle would be like changing the gears in a quick change axle in a race car.  Easy and inexpensive to do.

 

Moving the chain from between the hydrostat and the 3 speed to between the 3 speed and axle will place a larger load on the chain.  If you plan on pulling stumps, you ought to use a double chain - with a good guard - since this assembly will be under your seat.

 

As I said before, good luck and have fun.

[19richie66 16,942]

Thank you sir! Definitely gives me a several options to think over. Might need to increase my life insurance policy 

[19richie66 16,942]

Got my coupler figured out. Fingers crossed it is true. I machined a small insert to press fit into the centers of both and on the lathe it was good. Clamped it down real tight to tack weld it. Once I know it is straight, I’ll get it solidified. This will connect the hydro brake shaft to the 3 speed input shaft. Then I will run a chain down to the rear end pinion. 

[Pullstart 59,726]

Your abilities tell me it’s true Richie!  The shadow, it’s making fun with my eyes!  

[19richie66 16,942]

Just have to make some mounts 

[8ntruck 6,376]

Might be a day late and a dollar short with this idea, but it might be a good idea to put a LoveJoy or a chain type coupling between the hydro and the transmission. 

 

Doing so would reduce the amount of precision needed in the alignment of the mounts for the hydro and the transmission.  

[19richie66 16,942]

15 minutes ago, 8ntruck said:

Might be a day late and a dollar short with this idea, but it might be a good idea to put a LoveJoy or a chain type coupling between the hydro and the transmission. 

 

Doing so would reduce the amount of precision needed in the alignment of the mounts for the hydro and the transmission.  

Yeah I have been toying with that Idea. Just a matter of finding the right pieces. Going to get the mainshaft bearings replaced, transmission mounts made. I’ll make sure the front and rear are set into the right spot then I’ll see where I’m at. Appreciate the feedback.👍

[19richie66 16,942]

 @8ntruck I thought about your suggestion and decided to go with a chain up front. I cut my connector back apart as it had just a slight wobble to it. Decided against it. Bought two weld hubs and sprockets for the front. I’ll deal with the rear gearing after I get the transmission mounted. I ended up going with #50 chain, a 15 tooth on the hydro and a 19 tooth on the transmission input shaft. I also picked up a bearing for the tip of the input shaft. Going this way lets me slide the transmission further forward and lower so I won’t have long chains to deal with.  With it lower and forward, I should be able to keep the three point but will have to run power steering. 😁

[19richie66 16,942]

Test fit  2.0……..  Front mount roughed in. Still need to make a rear mount. 

 

 

 

Edited January 1, 2023 by 19richie66

[953 nut 51,699]

                   I don't think a solid coupler like you were making would have held up, this is much better.

[19richie66 16,942]

More adjustable this way too. 👍

[littleredrider 408]

I'm reading all this math, using that trans, this hydro, but no one has mentioned what the ratio is in the rear?? That makes a huge difference as well. 

[Pullstart 59,726]

Looks great Richie!  Your engineering would make Boeing proud.  Landing gear is always the last design effort…. They get the last available space.  

[19richie66 16,942]

43 minutes ago, littleredrider said:

I'm reading all this math, using that trans, this hydro, but no one has mentioned what the ratio is in the rear?? That makes a huge difference as well. 

Post #6 

4.10 

[19richie66 16,942]

8 minutes ago, Pullstart said:

Looks great Richie!  Your engineering would make Boeing proud.  Landing gear is always the last design effort…. They get the last available space.  

Backyard AND Youtube certified 

[littleredrider 408]

Oh ok lol, missed it somehow....

 

[19richie66 16,942]

This poor girl was worked hard. I was cleaning parts today and found damage under all the grease. Steering column bracket was almost split in half and the cylinder mount plate was twisted and cracked. I did get the 3 speed cleaned out and installed new front and rear bearings. 

[19richie66 16,942]

Made some frame filler plates. Hopefully this will strengthen the rear of the frame a bit. Also made a pattern for a pilot bushing mount for the front of the transmission shaft. 

 

 

Not much but I didn’t want @WHX?? uncle Jim to think I wasn’t doing anything. 

Edited January 10, 2023 by 19richie66

[Lee1977 6,217]

You do good work with cardboard.  I would round that top right corner. Those sharp corners always come back to bite me.