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New member

Re: caterpillar trouble shooting

Hi sir! I am sea men and now I have a problem about Diesel engine type 3406b. When engine running then have fuel oil leaking in lubricant oil. I was checking injection valve and fuel oil pump but I don't find it.so admin or everyone can help me to find it? If have I thank you so muck! You are welcome!!!!!
Super Contributor

Re: caterpillar trouble shooting

Fuel in the crankcase can come from leaking fuel injection nozzles, internal fuel lines, transfer pump or injection pump. Inspect in that order.
New member

Re: caterpillar trouble shooting

Thank you so much.but was check injection nozzle no leaking and high pressure pipes test with 280 bar until no leaking. About transfer pump I was inspection and renew some part as piston and new oring.so injection pump what do you think about it and ring or no burn at 1 cylinder?
Super Contributor

Re: caterpillar trouble shooting

If one cylinder is not firing, fuel will pass the piston rings and enter the crankcase.
New member

Re: caterpillar trouble shooting

Thank you.! I find that at injections pump.