Oil & Fuel jd 790 will not start

[gary messenger]

Having problem with tractor starting.Turns over but not start.I am sure its a fuel problem.Installed new fuel filter.Guel pump was not clicking.found that fuse was blown.Put in 3 new fuses all blew.Put in a 20 amp instead of 5 amp.Pump now clicks but would not start.I them bled the system.Am getting good fuel to injector pump,but nothing out of the pump
Any help would be appreciated.

 

[sisupower]

Fuel tank clean? Free of rust and debris? Is it a metal tank?

 

[gary messenger]

Metal tank,clean of rust and debris.Good fuel glow to injector pump.No glow out of pump

 

[sisupower]

I've had issues in past with the injection pump jelling up or getting something lodged in it. Either that or it's toast and needs a rebuild.

 

[sisupower]

3 months ago I got 5 790 tractors in shop that needed work. Big jobs. Mostly front axle stuff. But they show in groups. I won't see one probably till same time next yr lol. It's funny how it works

 

[gary messenger]

A bad pump is what i am thinking also.Any idea why fuses keep blowing?Could the solenoid have any connect tp the problem.

 

[sisupower]

Um not sure I'd have to look at the schematic and see. I can look Monday when I'm back in shop

 

[Spanner]

Proof-reading your posts would be a good idea. "Guel" & "Glow".

Electric fuel pump is pumping now with the 20A fuse and you get fuel at the IP inlet. Try a 10A fuse. I think 20 is too big.
No fuel out to engine when cranking.

Before condemning the entire FIP -

I would suspect the Solenoid. Check other fuses to ensure you have power to the solenoid "Pull" circuit when cranking.

Use the "Search'' function on here. Numerous threads describe this issue already.

 

[Phillip w]

Here is my thought. How has the tractor been running? Most of the time, but not always the injection pump will" start talking to you" before it gives up . The engine will kind of surge at times, or it can be hesitant when you put the throttle to it. It you under a load or hard pull, your "power my seem anemic. I take a hard look at the fuel solenoid. The fuel solenoid went out on my dad's little John Deere. There was no getting the tractor going without it. I think it costed him about 150 dollars but it is a pain to replace.(need really small hands)

 

[kuboman]

Are you getting smoke out the exhaust when you are cranking? If not then it will be the fuel solenoid. If you are then check glow plugs.