In the picture John sent, the levers that are shown, the roller on the pump pivot lever goes behind the levers.
The levers don't move very far, it's a tricky adjustment. You can move the roller lever and make the arms go up and down, get an idea if it's working. Pushing the roller back raises the arms, letting it spring forward lowers them. Be careful not to allow it to raise all the way up, can break the top plate or cylinder! When properly adjusted, the arms will stop just before reaching the end of their travel.
Get an idea where the roller needs to be positioned in relation to the arms, stop the engine and adjust the nut where the roller lever pivots (down below the oil level). Best I remember it's a small nylock nut that stays where it's stopped. Hopefully nothing was damaged during the removal and assembly, the lever mechanism is complex and fragile.
But above all, NEVER reach in there with it running!!!