I was servicing my air filters and doing a little cleaning in the engine compartment of my Cat D3G 2005 dozer. My obsevations were that 2 lines (rubber) come into the engine area. They become metal at the injector pump from which six metal lines go out to each cylinder. One of the rubber lines goes directly to the injector pump. The other rubbler line goes to the top of the engine and becomes metal where it runs along the engine: at each site where the line from the injector pump enters the cyclinder a the line along the engine sends a branch into the injector line. Can anyone give me an idea of what goes on here. I know I could be more clear if I get some idea of what is going on. PS: The rubber fuel lines have very minor surface cracks. Is that a problem? Do these type fuel lines have an inner core along which the diesel flows? Thanks
I'm not familiar with your machine but on my 1997 315L the glowplug wires sound like what your describing. What engine is this a 3046? Any pics?
Just the return lines. not all the fuel delivered to the injector is used so the excess is returned through these lines.
Return lines. Thanks Lee. tracksfan, the engine is the 3046T. There are no glow plugs on the G models.
Lee, that also explains another mystery for me. In the left compartment under the cab where the fuel/water filter is located, two metal fuel lines come out of the tank. One goes to the filter/priming pump and the other goes forward to the engine. That must be where the return line is going back into the tank. Also, what about the small surface cracks in the part of the fuel line that is rubber. Are they a problem if the are very minor?
Hello all. My experience with return lines on a jd 450 loader, the return lines started leaking while out on a job,(not bad, just seep)our return lines were close to the exhaust manifold, and the fumes made it uncomfortable to operate(eyes burning),not much smoke like you would expect, mostly just strong fumes. Anyway we had to stop work and go get hose and fresh clamps. The property owner was not happy cause we were twisting wrenches not pushing dirt. A discussion followed(heated)Had we fixed them at home when we knew they were cracked, long in advance, we would've saved down time, and an argument. What made it bad, we were not billing during down time, but that didn't seem to matter to this individual(donkey). So that one and only hick-up on the job was enough to stop further referrals from said donkey. It was a cheap fix. Took a little time to replace all, not the easiest to get to. You would'nt think a low pressure line return line could cause so much trouble. Live and learn, 20 years ago and like it was yesterday