This is the other side of the F125. It does make sense that these contacts are the range selection for the TCU, and the others are just switches for extra stuff. The base contacts look fine, but the moving contacts do look pretty dirty. I cleaned all this up with scotchbrite, greased it up and bolted it back together.
I learned a new way of refilling 5HP gearboxes the other day - pump it in through the oil cooler return
I got 6 litres in to it this way, compared to the usual 3 from underneath. This should mean it is very close to normal level on first start and just needs a little bit topping up once its up to temperature, or possibly a little letting out.
Taking the gearbox off the engine stand and putting it back on the engine and gearbox machine:
The refurbished torque converter should be back from JP Automatics tomorrow so I can put the engine and gearbox back together, and a replacement exhaust manifold will hopefully be here on Tuesday.
In case you've never seen where the main scuttle drains are, here's a pic:
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