185 Allis Chalmers that needs to have the fuel pump worked on and trying to find someone or do you know of anyone that would be able to fix it. It is a diesel engine. The tractor starts really nice and you can drive it for 5 minutes before it dies. Fuel filter changed, sediment jar cleaned, new fuel. I can get it to keep running if I loosen a bolt on the top of the fuel pump but fuel squirts out that hole and the bolt gets more loose as I drive it. Thank you in advance for any help that can be given.