4720 no start fuel issue

[Red Horse]

Guys, My 4720 4024T Deere suddenly refused to start while cranking it, puffing a little smoke but no start. It is an '07 with 2200 easy hours.

Put a new fuel filter in about75 hours ago and it ran fine until this issue. Anyway I put a quick charge on battery thinking maybe not enough cranking speed and it fired right up. Used a few hours over last day or two then today I ran it about 10 min, I shut it off then 10 min later would not start. Same issue cranking but no fire. I gave the pump a few strokes and although it started the hand pump never gave any resistance. I figured I better put it in barn to work on it and I got half way in and RPMs just dropped off. Tried about 3 times draining filter- no water by the way following procedure in manual but no luck.. Fuel looked clear -hiway diesel no dye. Gauge still read "full" but then I remember that gauge "full" is not the same as seeing fuel in filler neck so tomorrow I will top off and try again.

Any thoughts ?

 

[RjCorazza]

Sounds like maybe it's sucking air. I would start by reseating the fuel filter, and checking fuel lines for cracks. If your machine has an electric lift pump, confirm that it's running with the key on.
If those items check out, check for adequate fuel flow at various points from the tank out (tank, before filter, after filter, before / after lift pump).
Good luck.

 

[Red Horse]

Thx RJ, will do