Fuel Problem Ford 4630

BQZ · Oct 14, 2009

Can't get tractor to start,I can spray a little starting fluid in and it will start for a second but dies of course.
Here's what I've done so far,
Cleaned tank(filter in tank was totally clogged no fuel leaving tank ),cleaned water separator,changed filter,purged filter,purged pump.Still no start.
I'm getting fuel to the pump,but when I take the fuel line off that goes to one of the injectors and turn engine over it only trickles out at best,more like a very very slow drip.
Any ides???

Jerry/MT · Oct 14, 2009

BQZ said:
Can't get tractor to start,I can spray a little starting fluid in and it will start for a second but dies of course.
Here's what I've done so far,
Cleaned tank(filter in tank was totally clogged no fuel leaving tank ),cleaned water separator,changed filter,purged filter,purged pump.Still no start.
I'm getting fuel to the pump,but when I take the fuel line off that goes to one of the injectors and turn engine over it only trickles out at best,more like a very very slow drip.
Any ides???

You'll need to bleed the fuel system at the filter(s) first. Open the tank valve and remove the bleeder screw at the top of the filter(s) til the filter is full of fuel and no air bubbles are visible coming out. Then tightn it down. Make sure that all your fuel line fittings are tight and cannot leak air in.If your injector pump has a bleeder, bleed it also.
Make sure your battery is fully charged. Then crack the fitting at one of the injectors enough so that it can leak fuel. Crank the engine til you have nothing but fuel coming out of the injector and then tighten it. Repeat for the other injectors. The engine will usually start as the last injector is bled.

BQZ · Oct 14, 2009

You'll need to bleed the fuel system at the filter(s) first. Open the tank valve and remove the bleeder screw at the top of the filter(s) til the filter is full of fuel and no air bubbles are visible coming out. Then tightn it down. Make sure that all your fuel line fittings are tight and cannot leak air in.If your injector pump has a bleeder, bleed it also.
Make sure your battery is fully charged. Then crack the fitting at one of the injectors enough so that it can leak fuel. Crank the engine til you have nothing but fuel coming out of the injector and then tighten it. Repeat for the other injectors. The engine will usually start as the last injector is bled.

Done all that but haven't bleed the injectors yet,kind of hard because I have to pull the battery out to get to the injectors.but I can make it happen,

Question though ?I have already bleed the filters and pump,it seems i could loosen a line going to the injector (by the pump)and it should put a good stream of fuel shouldn't?? or is it more of a vacum type system.
Sorry don't really know a great deal about disel, but can firgue it out with a little help.

RickB · Oct 14, 2009

Bleed the injector lines at the injector end. That's the best way to purge air from the entire line. Bleed more than one line and make sure you bleed #2 injector line, as that exits the top of the pump head. no sense bleeding air from the bottom of the pump. You can also bleed the pump itself. There is a 5/16" hex bleed screw at about 10:00 on the pump body. Take that out, crank the tractor over with the fuel shutoff 'OFF', when fule spurts out onto the front tire, the pump is bled.

BQZ · Oct 14, 2009

You can also bleed the pump itself.

Question though ?I have already bleed the filters and pump,it seems i could loosen a line going to the injector (by the pump)and it should put a good stream of fuel shouldn't??
or is it more of a vacum type system.

How can I test the pump??

RickB · Oct 15, 2009

BQZ said:
Question though ?I have already bleed the filters and pump,it seems i could loosen a line going to the injector (by the pump)and it should put a good stream of fuel shouldn't??
or is it more of a vacum type system.

How can I test the pump??

You won't get "a good stream of fuel" from the injector lines. More like a couple cc's of fuel per compression stroke. It is not a "vacum" type system, whatever you mean by that. Injectors work by high pressure fuel opening a valve held closed by a spring. Air in the lines will compress and not allow the spring to unseat. Removing the injector lines at the pump end won't do a good job of purging air from the system.
There isn't a decent way to test the pump without a test stand, which is s specialized tool not available to the common man. The tractor either runs, or it doesn't; that's the test. You just need to be more diligent in bleeding the pump. Go through the entire procedure again, especially bleeding the pump itself, and bleeding the injector lines AT THE INJECTOR END. The battery is on a swing out tray. If you have a loader, use the starter (in small run intervals) to raise the loader, prop it for safety, and swing the battery out.

BQZ · Oct 15, 2009

Thanks Rick I'll get after it and re-post when I get a chance.

It is not a "vacuum" type system, whatever you mean by that

This would be something similar to how your lawn mower pulls in gas.

Soundguy · Oct 16, 2009

Some setups use a fuel pump.. some have a lift pump in the injector pump.. and this ain't a lawnmower engine.

soundguy

oliver28472 · Oct 16, 2009

If you are sure you have good flow starting at the tank fill it up to help with fuel pressure. Start your bleeding there first then bleed at the next stop. The sequence should follow the flow. If you have a transfer pump make sure it is doing it's job. I've never had to open a line at an injector.

BQZ · Nov 8, 2009

I'm back guys.thought i had the pump purged but I guess not when I open the bleeder screw at the pump and turn engine over I get nothing! (at first there was a little squirt)now just an occasional bubble ,I have cranked and cranked and cranked but no fuel.I have bleed filters and lines all the way to the pump but can't get any fuel out of it.Any ideas?? as to what I can try next?

Soundguy · Nov 9, 2009

does that unit have an electric fuel pump before the injector pump?

soundguy

BQZ · Nov 9, 2009

does that unit have an electric fuel pump before the injector pump?

no,it comes from tank to filters to injector pump.

Soundguy · Nov 10, 2009

I think I'd rig up a temp fuel line and tank.. I have a rig i use on my tractors when moving them with no fuel tank on.. or when troubleshooting.. it's a lil 1 qt container with a nipple on the bottom for a hose.. might have been an ww holding tank or something.. not sure where I got it.. I stick a lawnmower fuel filer inline after the tank.. then more hose... holds enough gas or diesel to mave machines rounf the yard if i have their tank /hood off.. or if I'm troubleshooting a fuel flow issue.

might have a bad lift/charge pump on the backside of the injector pump.

soundguy

blws · Sep 23, 2012

BQZ said:
I'm back guys.thought i had the pump purged but I guess not when I open the bleeder screw at the pump and turn engine over I get nothing! (at first there was a little squirt)now just an occasional bubble ,I have cranked and cranked and cranked but no fuel.I have bleed filters and lines all the way to the pump but can't get any fuel out of it.Any ideas?? as to what I can try next?

just wondering what if anything has helped ? I have the exact same problem

Sawdustsmb · Sep 23, 2012

blws - maybe not - if you both take the line off between the filter and injection pump, are you getting fuel flow there????

blws · Sep 23, 2012

Yes there is fuel flow there

richardm93 · May 11, 2013

BQZ said:
Can't get tractor to start,I can spray a little starting fluid in and it will start for a second but dies of course.
Here's what I've done so far,
Cleaned tank(filter in tank was totally clogged no fuel leaving tank ),cleaned water separator,changed filter,purged filter,purged pump.Still no start.
I'm getting fuel to the pump,but when I take the fuel line off that goes to one of the injectors and turn engine over it only trickles out at best,more like a very very slow drip.
Any ides???

just had same problem. traced it with a friend and found kill switch fuse bad. on 4630 fuse box is behind swing out battery. its a 5 amp fuse, 3rd from bottom on right side. maybe that will help

laloacosta91 · Jun 24, 2016

im having somewhat the same issue, except im getting good flow throughout the fuel system, from the tank, to the filters, to the injection pump, and the injectors begin to get fuel but the tractor wont crank long enough for the fuel to completely reach the injectors. even if i have the battery charger on it and begin to crank ill get a solid 5 seconds of strong crank and it dies down as if its losing power, i know its not the battery because i got it tested. checked the kill switch fuse and it looks like there was never a fuse there to begin with, theres not even a port to put the fuse in there anymore. i had this tractor running just fine yesterday and go to start it today and i have this issue out of nowhere

TractorTech · Jun 24, 2016

Doesn't sound like a fuel issue, but rather an electrical one such as cable crimp corrosion (any smoking while cranking? ) or a starter problem.

laloacosta91 · Jun 25, 2016

TractorTech said:
Doesn't sound like a fuel issue, but rather an electrical one such as cable crimp corrosion (any smoking while cranking? ) or a starter problem.

Actually yes, smoke comes from the solenoid if I give it too many cranks