Tractor won't start

[WishinIwasFishin]

Hi folks.....I have a Farmtrac 435 that will not run. It was running fine while I was cutting grass the other day and just quit.It has fuel in the tank and I just changed the fuel filters today,no luck.I was cracking lines to bleed air and noticed that I have no fuel coming out of the injector pump going to the back and middle cylinders.There is a good flow going to the front cylinder.I tried to use the manual pump to force a flow but still nothing.The tractor turns over great it just wont catch.Do yall think the fuel pump is bad or something else?Any help appreciated.I figured I would ask before just throwing parts at it.I posted in the Farmtrac board but there isnt much traffic over there.

 

[Soundguy]

check fuel flow to pump first.

now.. is it making any smoke?

is the fuel stop cable or solenoid in cut off position?

soundguy

 

[Short Game]

Could you try squirting some fuel into the air intake at the engine while cranking it? When my injector pump failed on my old tractor, I could make it run for a few seconds by using a squirt can of fuel. That helped me narrow it down to the injector pump.

 

[WishinIwasFishin]

May sound silly but where is the fuel cutoff solenoid? I shot a little starting fluid in the air cleaner and it ran for a few seconds.Getting decent fuel spray at each injector??? Stumped

 

[Short Game]

May sound silly but where is the fuel cutoff solenoid?

Mine was on one end of the injector pump. Don't know where yours might be.

What killed the injector pump on my K3M Mitsubishi engine was the fuel shutoff solenoid. Its return spring was so strong that when the key was turned off, it would literally slam the throttle rack gear back inside the pump hard enough that one of the fuel control metering pinions broke a tooth off. That tooth got stuck in the oil between two of the other teeth and stopped the governor from pushing the rack gear back in far enough to turn up the wick. I could still see a spray pattern from the injector nozzles, but it just wasn't enough fuel to fire the engine. It took weeks and fooled every diesel guy I could get to come by and look at it. The F.I. Specialty shop guy had never heard of such a failure, but it happened to lucky me. When I took the pump apart, I found the tiny pinion with the broken tooth. I got the replacement pinion from the specialty shop an fixed it for $7 plus a couple bucks for shipping. The shop guy talked me through tearing down and rebuilding my $1300 pump on the phone. Good guy.