Hi Marc,
thank you for the reply.
It seems my link to the image of the forklift has been removed. The forklift is an old one - I suspect 1980s but dont know for sure.

How do I know if there is an inching valve on the machine? If I put it in drive (forward or reverse) and not rev the forklift doesnt move at all (brake pedal unpressed). If I rev it then it starts to move. Is this normal behaviour?

Im trying to identify the model but not very successful at the moment.
Is there somewhere I can look for forklift workshop manuals to show me where the transmission fluid goes in/out?

If the clutch plates are burned then how big a job is that to swap?