Sticking injector pump on B20/D950 eng

tzmike

New member

Equipment
B20 BT750 loader
Jul 11, 2011
2
0
0
hudson valley ny
Hey all.
I figured I would relay my predicament and my remedy.
I parked my B20 after use. ran fine. I went to use it 2 weeks later and it wouldn't start but gave a hint of wanting to run. It was determined that fuel delivery was the issue. Cracked the 3 injector lines and lo and behold, only one line had fuel coming out. I removed the injector pump and found 2 of the plungers STUCK. I stripped it down making note of ALL THE TIMING MARKS/DOTS. I then tapped out, very softly the plungers. I started with polishing on wire wheel. Good but not great. I then took small amounts of valve grinding compound into each plunger bore and GENTLY spun plungers as I applied up and down motion. Cleaned all up, timed and reinstalled. RUNS LIKE A CHAMP ! Caution: these plungers/bores are tight tolerance and DO NOT POLISH MORE THAN neccessary. Save yourself a couple hundred on another pump...
 

B7100

New member

Equipment
B7100,B7100 with Backhoe and FEL, Goldoni Quad 20
Feb 11, 2010
422
3
0
Wales
Hey all.
I figured I would relay my predicament and my remedy.
I parked my B20 after use. ran fine. I went to use it 2 weeks later and it wouldn't start but gave a hint of wanting to run. It was determined that fuel delivery was the issue. Cracked the 3 injector lines and lo and behold, only one line had fuel coming out. I removed the injector pump and found 2 of the plungers STUCK. I stripped it down making note of ALL THE TIMING MARKS/DOTS. I then tapped out, very softly the plungers. I started with polishing on wire wheel. Good but not great. I then took small amounts of valve grinding compound into each plunger bore and GENTLY spun plungers as I applied up and down motion. Cleaned all up, timed and reinstalled. RUNS LIKE A CHAMP ! Caution: these plungers/bores are tight tolerance and DO NOT POLISH MORE THAN neccessary. Save yourself a couple hundred on another pump...
Respect for fixing your problem :)Myself, I don't fancy useing any thing as course as valve grinding paste on the internals of any injection system I am servicing though.
Oh!welcome to OTT, I'm sure you will get some good tips and pass on a few of your own.
dave
 
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cgutenschwager

New member

Equipment
D950 on a JAcobsen Turfcat
May 14, 2013
3
0
0
Lapeer, MI
I have a d950 in my Jacobsen Turfcat and think i might injector pump issues. 1) it takes a lot of work to get it started 2) once it warms up, it stalls out like its running out of fuel. Seems like a lazy pump to me, any other thoughts?
 

biozide

New member
Nov 27, 2013
2
0
0
Norway
Hi,

When re-installing the plunger barrel, is there a certain way or does it just slip down on the plunger? I noticed that the plunger barrel for the cyl no 1 had some kind of set-srew that i slides down on to lock it inn place, but not for 2,3,4...When moving the rocker-armcontrol the barrels move from side to side, will this affect the injection. What im asking is: Will the degrees of plunger barrel "one or the other way" affect the injection?



Jon

Norway
 
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