My new Ford 4000

[the old grind]

Yeah, I was a bit broad with the list there ...

... General bits from me, and not make/model-specific. ...

Didn't mean/need to step up from 'lurking blue', but have done my share of troublshooting and 'waking the dead' (both a fascination) and I kinda blurted.

Looked in while pondering a ~50 hp Ford (basic gear vs SS or shuttle, btw)... hoping to gain familiarity by following other's 'work' on such. (I'll be quiet ... )

 

[ovrszd]

I enjoy these discussions as well. I always learn something. If I can just remember where I store it in the old brain.

 

[gemutlich]

Dang envious that your 4000 is as close as the other side of the wall in your garage, my 641 is an hour away and I haven't been able to get up to it in a few weeks. It's killing me! Lol

 

[kuschneider]

Yeah, that is pretty handy. Once we get it ready to go it will leave at my little slice of heaven about 75 min away.

 

[kuschneider]

What these two small holes in the my carb? I am suspicious of these two as the source of my idling problem. The rear one with the brass fitting, seems to have a 2nd smaller orifice inside, and when I shove a needle into it as far as it will go it come out dirty, think there is some shellac from old gas in there. Where is the outlet for these? Everything else I am able to both ends of the passages, but these two I cannot.

The main nozzle in the back, it not held on with a nut. It appears to be a single piece with the jet on the underside, I cannot get that jet out. Might try to heat it, but the top of the jet is getting deformed. Idle jet is being difficulty as well.

Thanks in advance

 

[Midniteoyl]

Here is a photo of my 871 inching pedal. Yours should be similar. Possibly someone replaced it with something else. Post a photo if you can.
Yes the PTO will spin when lever for driveline is disengaged. You are disengaging the trans to rear not the pto.
I never cared for ford's gas line routing through the manifold I run a steel line from the tank towards the front of the engine bend into come around over the alt/genny, sometimes will add rubber hose, and easy access shut off. If I remember correctly some of the earlier lines were 1/4 and some were 3/8 depending on the carb/manifold you have.

Kirk

Had a few cans of Silver left over, did ya? Nice looking..

 

[kuschneider]

What these two small holes in the my carb? I am suspicious of these two as the source of my idling problem. The rear one with the brass fitting, seems to have a 2nd smaller orifice inside, and when I shove a needle into it as far as it will go it come out dirty, think there is some shellac from old gas in there. Where is the outlet for these? Everything else I am able to both ends of the passages, but these two I cannot.

The main nozzle in the back, it not held on with a nut. It appears to be a single piece with the jet on the underside, I cannot get that jet out. Might try to heat it, but the top of the jet is getting deformed. Idle jet is being difficulty as well.

Thanks in advance


View attachment 476895

OK, after lots of reading I have determined that the top, smaller hole, is the air vent that leads to several bleeder holes in the nozzle. The lower, larger holes in the terminal end of the idle fuel passage, and after the gas passes through this it enters the idle jet and will then be mixed with air and out the 2 idle orifices. I cannot for the live of me determine where the origin of the idle fuel passage it, or how gas enters that passage?

This picture, clearly is just for reference and doesnt reflect the actual location, length, or orientations of the actual components. But for the life of me I cannot determine how the gas travels from the fuel bowl #1, into the idle fuel passage # 10. Since I never found it, my gut tells me it is at least partially blocked and the source of my tractor's idling woes.

 

[the old grind]

The main circuit just isn't shown in the diagram. (fixed, so no 'adjustment' info)

Fuel is drawn (up) into the idle circuit by the high vacuum behind the throttle plate at idle. btw, the 'secondary orifice' is to smooth the transition coming off idle and reduce 'bog' as vacuum drops briefly then & w/o an accelerator pump, ... if one wonders. (lawn mower-simple)

That large tube may have a fixed orifice (out of sight), is likely pressed in, and IMO should be left as is (in place) for now lest putting it back in be much more trouble than removing it with no reason 'indicated'.
(off-idle running is ok, no? ... a KISS epiphany here?)

Gunk that fresh gas didn't yet flush from the idle circuit/jet is ... like, jumping up and down waving a red flag as the cause of lean running. IMO, one little thing to fix and one 'baby step' that may get you walking. jon

 

[kuschneider]

Yeah,

Looks like the there is a orifice in the nozzle that allows gas to enter the idle circuit, and it is clogged. Without getting that tube out then I will struggle to get it cleared. My partner has a compressor, maybe we can get lucky and just blow it out.

 

[Kirk-NJ]

Had a few cans of Silver left over, did ya? Nice looking..

The only thing that is silver on my gold demo is the caps that attach to the shifter and the rear PA rims

Kirk