T7.200 Auto command low gearbox pressure

[robin banks]

Hi have just got a new to me 2015 T7.200 auto command. Have got 2 warning started coming up one for wheel sensor but more worryingly it's started throwing up code 2553 which i think means low gearbox pressure. I changed all filters and still does it when I am pulling a vaderstad 3m. Have tried going very slow and fast but fault will come up at 3km or 12km which means it's doing it in range 1 and range 2
Any ideas?

 

[DrDunc]

Hi have just got a new to me 2015 T7.200 auto command. Have got 2 warning started coming up one for wheel sensor but more worryingly it's started throwing up code 2553 which i think means low gearbox pressure. I changed all filters and still does it when I am pulling a vaderstad 3m. Have tried going very slow and fast but fault will come up at 3km or 12km which means it's doing it in range 1 and range 2
Any ideas?

Does fault code happen when pulling with the revs up, or headland turns more or less at engine idle?

If at low engine rpm, it could be the lube pressure valve spring is getting tired. With the oil hot, the system pressure dips below the minimum. New spring or shim the existing?

I've ideas on why if it's at higher rpm, but rather than needlessly cause anxiety, it'd be better I can't quiet until someone with more knowledge makes their suggestions.....

 

[robin banks]

Yes was more happening at low engine rpm I think

 

[robin banks]

Was happening on headland when put back into work but once tractor warmed up it stopped

 

[cosmagedon]

I had a pressure issue on my LWB auto command. Tee a gauge into the sensor port to see what pressure your actually getting, either that or get the dealer out as you can see the pressure with the laptop plugged in.

The low pressure vane pump is variable displacement and has a compensating valve to control it, the pressure on my tractor was just dipping bellow the minimum threshold on tickover cold, it was ok once warmed up. I just tweaked the compensator slightly and it's been good since.