Massey Ferguson 6170, clutch, dynashift and steering troubles

Wim3065

Member
Mixed Farmer
First of all, English is not my native language , but there's a lot of knowledge here, so I hope you can help me further. I'll do my best to keep it as clear as possible.

We have some troubles with our MF 6170, it must be one of the first batch, the exhaust is still in the middle of the bonnet. We bought it a year or two ago.
When the tractor has cold we don't have any problems. But when the oil gets hot the following problems occure:
- The clutch is very jumpy, it does nothing and suddenly the tractors jumps forward
- The steering can be very hard, just like you have no servo steering.
- It also also happens the Dynashift does a little weird. For instance (fictive numvers) if you shift down from 1D to 1C it should you should go from 10 to 8 km/h, but he goes down to 6 km/h and then goes back to 8 km/h. I don't have the feeling it goes to B first, but it's like its slipping somewhere.

Oil pump is already replaced. But doesn't make any difference. There was also a nut loose in the transmission. The dealer fixed this also. But it seems like we can't fix the above problems.

I did a pressure test of the 17 bar circuit, had 16 bars at that moment.

There's a pressure valve under the bonnet. Could this one be the problem? As far as I can see this one also provides the 17 bar circuit from pressure? And the above problems are all on the 17 bar circuit?

Thank you in advance.
 

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