Please help me! Zetor Crystal gear box modify to 40, or 50 km/h

[totcsab]

Hi Zetor funs!

I read on the www that 12 and 16 speed gear boxes could be modify to 40 and 50 km/h.
Please help me.
I would like to get instruction manual , and pictures how can I make the modification.

Thanks

Csabi

 

[Renze]

You can do it on any Crystal gearbox if you want, but using a 12 speed, will give you a lot of cost.

Best is to start with a 40 km/h transmission (the one with 16 speeds and overdrive on the 4th gear) and 20.8 R38 tires.
The 40 kmh version of the 8245 on 18.4 R34 tires had the same topspeed as the 40km/h 16245 on 20.8-38 tires: This was done by changeing a set of gear wheels that drives the main transmission to the rear axle, in accordance with the tire dimension fitted.

You can achieve about 53 km/h when using a 40 km/h transmission, 20.8-38 tires, and a set of intermediate gears of a 40kmh 8245 which originally came on 18.4 R34

If you want to do this on a 12 speed, you need to get a set of gearwheels for overdrive, and change the set of intermediate gears from those of a 4 cylinder tractor.
If you have a 30 kmh 16 speed, you need to remove the 1st gear, move the 3rd gear so that it will sit in place of the 1st gear, and install the overdrive gear where the 3rd gear was.

 

[totcsab]

Hi!

Thank you for the informations.
Have you got pictures, instructions, and part numbers of the new things.
If I send you parts catalog pictures can you modify them?

Csabi

 

[Renze]

No, i have only heard about this modification. Some dealers know how to do it.

 

[totcsab]

Hi!

Thank you!
I will ask a dieler.

Csabi