[Richard Coutts-Smith]

The Humber User Manual makes it quite clear that the air pump (compressor) is not to be run at over 1000 RPM. Below is what happens when you do.
Piston crank is twisted, and the crankshaft housing has been near ripped off. Going by the welding on the crank housing this has happened before!
In my defense: 1/ There is a hand written sign showing "On" and "Off", which is the wrong way around. 2/ It has not worked since I got it, so it may or not be me at fault.
It appears to be a fairly generic item, and that a Ford Blitz one will fit (Right side of Gearbox vs Chev, Left side.) I was quite chuffed with this until I realised that I could not find my Ford one because I sold it at Corowa a few years back.....Ain't it always the way.
Rich.