I have been using one of these for quite a while to fill my Diffs and Transfer Box with oil :
It's good - but must be made for a fluid of much lower viscosity, so using it can be quite a work out.
So I was wondering if there was something that I could run off my compressor to do the job ?
First thoughts were a shutz Waxoyl type gun - with the end nozzle replaced by the pipe and hook from my hand pump.
Is there something else more suited ? Or any issues with the plan ?