Posted by BMD on January 18, 2009 at 10:54:07 from (65.254.172.6):
Working on a 364 with the BD-154 diesel engine that has a seemingly simple mechanical fuel pump problem thats we can not figure out, hopefully someone can help because I'm now clueless.
Purchased tractor at estate sale 18 months ago, has 3,000+ hours). The fuel pump was leaking very badly when we got it home. This is the mechanical pump(also know as the transfer pump) next to the bowl asm, not the injection pump. Purchased a new aftermarket fuel pump. Worked awhile and tractor stalls. No fuel exiting pump while cranking engine over. Maybe new bad pump? Buy new pump, cranks right up after maybe 10 hours same problem. Maybe trash in tank getting in check vales in pump causing problem? Remove tank and clean it out and flush lines and clean out bowl also new filter downstream from pump. Put on 2nd new aftermarket pump because we want to make sure this problem resolved. You guessed it, it cranks right up runs like a charm and after a couple hours use just dies in field while bush hogging. Tow it home and guess what! Good fuel supply going to pump and no fuel coming from pump when cranked(identical problem). Maybe problem with aftermarket pump. So order pump from another source that appears identical to original pump(possible NOS) . Guess what!you go it, cranked right up runs 15 minutes and dies,fuel pump not pumping again. Long story, but its surely not the pump, or is it? Cleaned out tank, lines bowl, been through several pumps from 2 different sources and same problem. I assume the pump is driven off a lobe cast on the crankshaft? And from what I can see through the fuel pump access hole looks OK. Considering going to electric pump and giving up if I can not get a handle on this trouble.
Sorry for the long story but I'm out of bright ideas. Sometimes it the simple problems that are the most difficult to solve. Not a total novice at this stuff, we just removed and rebuild the hydraulic to replace a broken draft spool valve without problem. But after this I'm going to demote myself to novice first class.
As always any and all comments and opinions are welcome.
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