As Bob said the racks need to be open, from the linkage end that would be towards you. Next turn the fuel on and remove the high pressure line on the #1 side which is on the right when your looking at the oil pump and push rods.  Then loosen the fitting on the pump and remove it with your fingers. Watch as there is a spring under it. Then lift the delivery valve off its seat and wait for the bubbles to stop and then replace everything. Then go to the #2 side and do same. Do to the shape of the cross over line line you must let the fuel flow briskly to bleed it. A trickle or a few drops does not bleed it. After this you should have fuel coming from both pumps and you can finish bleeding the lines and injectors

Finally getting the Bamford back together after waiting for the crank grinder. I sold mine a few years ago, wish I'd kept it. Also how to keep those banjo fittings from leaking which is a huge problem with the China and India parts. These are called Dowdy washers or Bonded seals depending on where you live. They have a soft seal to take up irregularities and a hard washer to tighten against. Your connection will be leak free. Now 9 Bamfords sitting here, anyone want a job?

I am not aware of any records for pumps.

Bob, at one of the Amish sawmills I work part time everyone goes to one back corner to relieve themselves. The mill is sided with tin and it is rotted off about 3 foot high from people pissing there, LOL

Eating supper tonight,
A truck backs in driveway with long trailer, Hmmm what's this all about??
Driver says he has two engines for me, Uhhh what??
He has a note, says repair as needed signed xyz Amish fellow from 3 states away.
 2 Z3 Bamfords they are the 7HP version. Out to the barn they go, many engines are a head of them. Hope he is not in a hurry!

Glad it worked for you,
As for corroding the flywheel to the shaft if you can let the engine sit a while you could try relieving your bladder withbit directed in the area of the shaft, flywheel junction???😅😅

Just a few more pics. The normal overhaul on one of these is 2x what a Lister costs due to all the hand work and lack of cheap parts.
Bamford uniquely shrouded intake valve. There is a rotation stop built into the retainer so the valve cannot rotate. Ordinarily all this goes in the scrap bin and new oversize valves are installed but this engine is low houred. We ground the valves, touched up the seats and it's good to go. Also shown is the copper sleeve for the injector bore. This separates the coolant from the injector. They are always rotted out or close to it. Many of these engines are half full of stop leak that was dumped in an effort to avert fixing this problem. The tubes are shop made as is the tooling required to swage it in place so it doesn't leak.