Lister petter Onan military mep802a injector pump 

John I just found your new video. Try one injector pump at a time. put the hold down on one of them, and see if you can move the rack. If you can move the rack back, and forth about a half an inch, it isn't stuck, You should also see the other one that you haven't put the hold down on move the injector pump. Now repeat that with the other one. With both injector pump hold downs installed you should be able to move the rack back, and forth. If you can't then one of them is stuck.

Preito's saying, you should look for a repair manual on the internet. It should show you how to maintain the pumps. I think.

Amigo, le sugiero buscar en internet el manual de mantenimiento , explica como se gradua la bomba cuando se han sacado de su lugar

I got it all back together. Pumps and rack are engaged properly, shims stayed with each pump and it still seems like it’s running on one cylinder. Lots of black smoke. Any more suggestions?

Sorry I don’t read Spanish. I discovered I have a cracked piston.