hi all, new member, first post, but long time follower. I have a 1990 bobcat 743 with the Kubota v1702 engine. I recently replaced the glow plugs because it wouldn't start under 40 degree weather without killing the battery cranking first, and put in a new lift pump. in order to remove the glow plug closest to the crank pulley, I had to remove a few injector lines off the injection pump. put it back together, thing started mint with a 30 second glow in 25 degree weather. super pumped. go back and look and its leaking from the injector line hold downs they're called. ordered new orings and the copper washers under the hold down per a few other threads. one of the washers fell down into the pump its self, I had to use a magnet and remove the plunger from that one port in the pump body its self, when I did that all the fuel in the pump housing drained out, I imagine out the bottom into the crankcase. got it all back together, new orings, new copper washers, bled it, start it and it runs like crap. definitely misfiring on at least on cylinder, let it run for about a minute incase it was air in fuel system somewhere, but it didn't get better and it was throwing black smoke like crazy. black smoke from my understanding is unburned fuel in diesel world. took it all back apart again, looked at all and compared and all were assembled the same. no difference. I cranked it with all the injector lines off the injection pump to make sure I'm getting some pressure out of all ports. fuel jumps out just maybe 1/2''? I don't have a pressure gauge that goes up as high as the repair manual says at 1400psi, nor the right fitting. I drained the fuel bowl, put in new fuel. no difference. I can't find a in depth video or explanation of how to disassemble the injection pump for this engine in particular. something tells me I did something in the pump but I don't know exactly what since it ran fine until I took hold downs out, some people on other threads say removing those hold downs will throw the pump out of time, but reading manual says the shims under the pump control the timing. I'm a Toyota/subaru mechanic, diesels are kind of foreign to me, and I don't want to put a $1400 injection pump in a $2000 machine unless I know its bad, or if I can rebuild it. any help would be greatly appreciated, thanks!
-Jeff
-Jeff
