M9540 lever above trans dipstick

KiwiKubota1

New member

Equipment
B7100HST, M9540
Apr 18, 2025
17
3
3
New Zealand
Hello all, new to the m9540 and I am wondering what the blacked handled lever above and to the right of the transmission dipstick is? I have just recently 2 days ago bought a seppi s9 flail mower and the side shift was working and now it isn't, it was leaking a lot from the coupling and overflowing from the dipstick as when it was serviced before I bought it they overfilled the transmission by filling it with the bucket up apparently. The hydraulic oil looks more much blacker than the oil on the dipstick? Any help much appreciated!