Posted by papaw8 on December 24, 2018 at 13:00:29 from (184.62.6.230):
Worked on a 4030 jd with jdb pump.elastomer ring disentigrated installed seal kit no glass ball in return.tractor now runs fine for a minute or so then sluggish above 1500 rpm. Put clear hose in return see about 4 bubbles every 15 seconds.replaced lift pump no help.transfer pump pressure about 30 psi but guage needle has rapid fluctuation. No suction at transfer pump.pulled pump back off going to tear down again.plenty of fuel delivered to injector pump.going to look for vent wire.any ideas appreciated.thanks.oh yes set 5 gallon can on floor with electric pump from an old gm Tbi car run through inline filter to injector pump runs fine at all speeds all the time.thanks
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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