oliver 1850/massey 510 perkins engine swap

It is possible that the snap ring in the pump is not in the right location. I sounds like you are using the right approach. Remove the pump. Make sure the engine is on top dead center 0 degrees, check that the master internal spline on the drive gear alignes with the notch in the block. That will give static timming of the pump. If the injection pump is OK, that procedure should start the engine, because nothing on the pump has been changed. The early 510 engines were actually timed around 22 degrees. If the notches I referred to do not aligne, remove the cover on the front of the auxllary drive(4 bolts), loosen the 3 allen headed bolts and turn the gear until they do align (the gear is slotted). Roll the engine over two turns and recheck. If you want 28 degrees. The pump has an "X" stamped on the housing for one of the delivery tubes. Attach an injecter tester to this port apply 100-200 psi to that port and rotate the drive coupling until the pump locks, at this point turn the snap ring in the housing with an O-ring pick so the sharpenned edge of it alignes with the "F" mark on roller cam. That doesn' change the timing but it will properly referrence, the marks. Install the pump, roll the engine to 28 degrees, turn the auxillary drive gear until the "F" is aligned with the snap ring and it should be properly timed. You can also use the slots in the base of the pump to get some change but the lines are usually to stiff to get much more than a few degrees. BTW it won't hurt to run the engine without the auxillary cover on it, maybe some oil loss.

Tom Dold
Dold Implement
201 S. Main St.
PO Box 70
Howard, SD 57349 605-772-4541
[email protected]