50s Continental TD427 injection pump problem(s)

M92PV4U · 2025-04-20T22:36:29.000Z

I have a 50s John Hollingsworth generator powered by a naturally aspirated Continental TD427. We have used this generator a few times with small issues like mechanical oil pressure gauge line breaking & small issues like that. Then in early 2020 it quit starting, but would run on ether. One of our friends / customers owns a diesel shop on the way to our jobsite so we dropped it off with him as we were too busy to look into it. His conclusion was contaminated fuel. We were in a hurry and sent the pump to a local place to be gone through, there was some kind of plunger stuck, keeping the pump from injecting fuel. The shop cleaned up the line set & installed a temporary fuel tank. We got a replacement tank built, because the orginal could not be economically taken apart. Now it has only been ran on new clean diesel and we're ready to install the new fuel tank. I get it installed and fueled up and run into the same problem again, this being a few months later we sent the pump back in with the same symptoms. By this time the company that rebuild the pump moved out of state, from Ca to somewhere else, I can find out tomorrow if it's important. They tore the pump down noted heavy varnish and re assembled it. I started asking questions and made a thread on a different forum and it was recommended that I give this machine heavy doses of power klenz id 5007. After getting the line set cleaned up again, changing the fuel pump & low pressure lines, filters & cleaning the housing that was reused everything was assembled and up and running.

M92PV4UJunior MemberJun 11, 2025#41

thepumpguysc said: What r u going to do about the seized head and rotor.?? U can tell what caused it to seize by the score mark around the rotor.. The pump manufacturer has made a list with pictures.. Good luck with the overhaul.. Click to expand... Nothing, the rotor is also broken. I have an inquiry out for a replacement pump, waiting for a response on that. I had to heat the stator with the rosebud while pushing the rotor with a 20t press. I'm not sure if the rotor broke when I tried to start the engine or if it broke when I heated it.

Reply