SAME RUBIN 135-gear shifting problem

[Cristi]

Hello!
I have a same rubin 135 tractor with powershift gearbox.When I command the joystick to change speed, it doesn't, but if I press the clutch it changes.
What could be the problem?

 

[daveydiesel1]

@Cowabunga is a bit of a same man

 

[Cowabunga]

Haven't got a clue I'm afraid. If it is only between 9th and 10th, then there could be a synchromesh issue. All the others apart from creep are clutch packs engaging and disengaging. Sometimes two at a time as in between 3rd/4th and 6th/7th and the same again with the same group of nine, this time between 12th/13 and 15th/16th, where the front epicyclic changes ratio as well as the constant mesh conventional range box further back. Obviously you know that it disconnects drive while changing from 9th to 10th or back the other way.

The way the transmission works is that it has a three speed epicyclic at the front and three range speeds at the back. This gives nine powershift steps 3x3=9.

Then there is a synchronised high and low range to give two groups of nine. 2x9=18. Plus there is a creep range and a robotised synchromesh shuttle. Both of these changes are not full power-shift, in that transmission is interrupted while they shift.
The main difference between the Titan and the Rubin that came later is that the range change between 9th and 10th on the Titan is fully manual via a gear lever while the Rubin is robotised via a ram that is computer controlled after a signal from either a button press or automatically if set to do so.

The Rubin is far too complex for most drivers and never sold in the volumes that the Titan did in the UK.
Good luck finding anyone to delve into the innards of these things without an absolute guarantee that you will pay the potentially catastrophic bill.

 

[Oh Deere]

Check battery voltage with engine running .
If not charging correctly gears will play up.

 

[Cowabunga]

Check battery voltage with engine running .
If not charging correctly gears will play up.

Good point. Also check the earth strap between cab and axle, which has a tendency to break. If that was the case the voltage would drop and ratio changes would either not occur or make the tractor jump like a kangaroo or other jerky/jumpy thing.

 

[Cristi]

Check battery voltage with engine running .
If not charging correctly gears will play up.

I'll check it out. Maybe that's because it's quite old

 

[Cristi]

Haven't got a clue I'm afraid. If it is only between 9th and 10th, then there could be a synchromesh issue. All the others apart from creep are clutch packs engaging and disengaging. Sometimes two at a time as in between 3rd/4th and 6th/7th and the same again with the same group of nine, this time between 12th/13 and 15th/16th, where the front epicyclic changes ratio as well as the constant mesh conventional range box further back. Obviously you know that it disconnects drive while changing from 9th to 10th or back the other way.

The way the transmission works is that it has a three speed epicyclic at the front and three range speeds at the back. This gives nine powershift steps 3x3=9.

Then there is a synchronised high and low range to give two groups of nine. 2x9=18. Plus there is a creep range and a robotised synchromesh shuttle. Both of these changes are not full power-shift, in that transmission is interrupted while they shift.
The main difference between the Titan and the Rubin that came later is that the range change between 9th and 10th on the Titan is fully manual via a gear lever while the Rubin is robotised via a ram that is computer controlled after a signal from either a button press or automatically if set to do so.

The Rubin is far too complex for most drivers and never sold in the volumes that the Titan did in the UK.
Good luck finding anyone to delve into the innards of these things without an absolute guarantee that you will pay the potentially catastrophic bill.

I had another problem when changing gears. The tractor does not change gears, even if I press the clutch. The problem was with a coil because it was not in the correct position.

When I came with him from the mechanic, I did about 4 km, and I noticed that he does not change gears, only if I give the joystick command and then I step on the clutch. A mechanic who has been working at Same for a long time told me that it might be from a sensor.

 

[Cristi]

Good point. Also check the earth strap between cab and axle, which has a tendency to break. If that was the case the voltage would drop and ratio changes would either not occur or make the tractor jump like a kangaroo or other jerky/jumpy thing.

I checked the battery. With the engine off it has 13.17 volts, and with the engine on it has 14.37 volts

 

[H200GT]

Where about are you based? As others have said the knowledge to repair them will be scarce, but there were a few good Same dealers dotted around the country who may still have knowledge of them. Fingers crossed it’s something simple like a sensor etc, would be worth trying to track down someone with some knowledge to spend an hour or two on it, they may quickly be able to identify a simple fix