I have a 1985 or so Ford 1510, with an injector rack that kept seizing up. When I pulled the injector pump, I found no oil in the pump sump. If I pour oil into the sump, it just runs into the block? I have the timing cover off now, but can't see how oil gets to the sump. Bearings in sump are of course dead. Block was rebuilt/replaced by unknown past owner, did they leave something out? Help, tractor is on small island overseas and used by local Fire/Rescue dept., so I can't take it to dealer. Thanks Jerry