Water pump out, opened gear box...

The water pump is out; waiting for the new one.

I have opened the gearbox to investigate about the faulty first gear...

The O rings in the first and second cylinders were hard but I did not find LHM in the gearbox.

I have polished the cylinders...

... and installed the new O rings. They are deep and the pencil help a lot to install them without scratching the cylinders.

First gear cylinder is ready.

The second gear piston/cylinder assembly.

I suspect that the second cylinder might be too far in preventing the first gear to fully engage; I will check this next.