Valtra N121 gears

[Fencingman121]

Hi, I have a small problem with my valtra N121 2010 model , when I am in 4th gear and try to drop down to 3rd the gearbox grinds, Thisbe should not be happening, every tractor should be able to go down gears without grinding, if anyone knows about this problem, please please reply

 

[Blue.]

Hi, I have a small problem with my valtra N121 2010 model , when I am in 4th gear and try to drop down to 3rd the gearbox grinds, Thisbe should not be happening, every tractor should be able to go down gears without grinding, if anyone knows about this problem, please please reply

Worn synchromesh between gears.

I had a 10plate n141 the gearbox was poor between ranges,you had to near stop to change range.?

 

[Fencingman121]

Worn synchromesh between gears.

I had a 10plate n141 the gearbox was poor between ranges,you had to near stop to change range.?

But the thing is, it doesn’t grind going up the gears, it’s only when I try to go down

 

[njneer]

But the thing is, it doesn’t grind going up the gears, it’s only when I try to go down

It will be only one side of the synchro that is worn.
If you imagine you have two gears and in between you have a synchro one side of the synchro marries up the 3rd gear and the other side of the synchro marries up the 4 th gear .
The 4th gear side is obviously still
Ok as you can go from 3rd to 4th with no noise but when returning from 4 th to 3rd it crunches it will
Most likely crunch from 2 nd to 3rd as well as it is the part of the synchro responsible for 3rd that is faulty.

 

[farmer pickles]

@MF 168

 

[Fencingman121]

It will be only one side of the synchro that is worn.
If you imagine you have two gears and in between you have a synchro one side of the synchro marries up the 3rd gear and the other side of the synchro marries up the 4 th gear .
The 4th gear side is obviously still
Ok as you can go from 3rd to 4th with no noise but when returning from 4 th to 3rd it crunches it will
Most likely crunch from 2 nd to 3rd as well as it is the part of the synchro responsible for 3rd that is faulty.

Ok thank you very much , would it be a big job to get the synchromesh replaced??

 

[ridger]

@james ds @Wellytrack

 

[Yale]

Have you tried double declutching using the button?

Knock to neutral,rev up then de clutch using pedal or button and try engaging lower gear.

 

[Wellytrack]

@james ds @Wellytrack

Oh dear. My scrap is a different shade of red so can’t help unfortunately

 

[njneer]

Ok thank you very much , would it be a big job to get the synchromesh replaced??

Yes it would be a fairly big job to strip gearbox and replace the synchro.

 

[Fencingman121]

W

It will be only one side of the synchro that is worn.
If you imagine you have two gears and in between you have a synchro one side of the synchro marries up the 3rd gear and the other side of the synchro marries up the 4 th gear .
The 4th gear side is obviously still
Ok as you can go from 3rd to 4th with no noise but when returning from 4 th to 3rd it crunches it will
Most likely crunch from 2 nd to 3rd as well as it is the part of the synchro responsible for 3rd that is faulty.
Thanks so much, would it be a big job to get it replaced and how much would it cost.??

 

[MF 168]

Have you calibrated the tractor lately?. Like all newer computer controlled machines these days they need a tune up every now and then to have everything working as it should. Our old T160 used be a lot nicer on the power shifts and gear changes after it was calibrated. There's a sequence you do to get the tractor to self calibrate a dealer might give you or perhaps someone here can explain. I can't remember how it was done on the T160 now.

 

[Blue.]

Have you calibrated the tractor lately?. Like all newer computer controlled machines these days they need a tune up every now and then to have everything working as it should. Our old T160 used be a lot nicer on the power shifts and gear changes after it was calibrated. There's a sequence you do to get the tractor to self calibrate a dealer might give you or perhaps someone here can explain. I can't remember how it was done on the T160 now.

I was presuming it was the hi-tec box,the original poster never said which gearbox he had.

 

[Pistonbroke]

N121 is a Hi-Tech but it could be that the clutch needs calibration and is "dragging"