MF 5610 dyna 4 transmission lost.

[wellywearer]

Hi all. Just lost all transmission on my 5610. Showing an error code T 1 53. According to the book, this reads as braking pressure too low on the 50km/HR high pressure braking unit.
Doesn't seem right as I don't have 50km/HR on the tractor.
Does anyone have any ideas please as I'm at a loss to know where to start on this, and can't contact RV Pugh until Monday now.