Hi All
First post and a bit of a long winded one but if it helps somebody else then its worth it!
I bought an old stothert and Pitt roller fitted with an AD1 Lister which cranked over and had good compression but had not been started for about 5 years, troubleshooting indicated no fuel out of the delivery side of the pump and after stripping to down to access the bryce pump I could not get the pump out, downloaded a manual from petter and followed the steps, tdc and run lever in 10* of centre and it would still not come out! Brain idea, ill buy another engine and just swap them over, exactly the same thing with this Lister AD1 which is ex military with cold start primer on, took the side cover off which exposes the timing gear and the stop run lever was not moving the rack, few gentle taps with a bar and hammer and the rack moved into the middle enough to allow the pump to be drawn out, first lister I've worked on and it was a real head scratcher as no one mentioned that the rack could be stuck to the side and without stripping off the side I would never have known as the stop run lever was moving through full rotation.
Hope this helps somebody and I'm sure i will be back on looking for more help
Ian's