farmall 400 ta

[johnnykopp]

help,i purchased a farmall 400 ta last fall and it ran fine.this spring it would not start.was not getting spark 1/2 the time.removed the distributor,replaced the points,condencer,rotor,distributor cap,wires and new coil.set the timing.drained old gas,replaced with new.it started right up and idels fine.when i move the lever to accellerate it does nothing but idel.i can move it up or down and does nothing but idel. linkage is connected.does anyone know could be wornge.any info will help.thank you,johnny

 

[Andrew Z]

Sounds like a broken spring in governor.



Andrew

 

[Absent Minded Farmer]

Did you have the carb off for any reason? If you don't have the governor shaft in the right position, when replacing the carb, it might give you the same issue. Check all of the pins in the throttle linkage (from handle to gov.) to make sure one didn't work it's way out or was replaced with a nail, bailin wire, etc. I'd also check behind the governor cover to ensure everything moves when the throttle is actuated. If you open the governor cover, be prepaired to replace the gasket. This should give you a start.

Mike

 

[johnnykopp]

thanks guys for your fast responce.i went to the barn to recheck the linkage,all is together,noticed that when the throtle lever is up the linkage pushes the governer lever foward,when down it pulls it to the rear..can't remember which is open or closed.i looked for a spring you talked about,can't find one.is it insde the governer?(oh by the way i did not remove the carburator).i tryed to start it while i was out there and it did not want to stay running.checked the gas bowl and it was 1/4 full of rust again,removed it and cleaned the filter screen and replaced it,the bowl only filled 1/2 way?i losened the glass bowl and gas came pouring out of the tank.tightened it and the gas stoped,tried again with the gas cap off and it did the same.what causes that?now im not getting gas to the carb.it seems that when you need the tractor all goes wrong.any ideas,johnny

 

[Wardner]

Pull the gas line off the carb. Remove the brass inlet fitting from the carb. You will find a cylindrical screen attached to it. Clean it and reinstall. This a a five minute job and should put you back to working with the tractor rather than on the tractor.

Put the wrenches (5/8" and 3/4") in your pocket. Until you remove and clean the gas tank, you will be doing this at frequent intervals all summer and maybe for the rest of your life.

Don't worry about the air in the sight bowl. It just means that the carb float has closed the inlet valve. You can bleed the air out, if you want, by loosening the sight bowl

 

[johnnykopp]

thank you for the info,i will give it a try this evening.does this have anything to do with the tractor not wanting to do anything more than idel?

 

[Absent Minded Farmer]

AAAAACH! Wardner, thank you! I keep forgetting about that rotten little screen that hides in the carb(& laughs at me 'cuz I can't find it). My 400 has been acting a little starved on the disk & I just couldn't find the restriction in the fuel line. My H, I just don't worry about any more. I put a screen over the intake for the sedimant bowl. I got that idea from the 8N I owned. Thought it was a great idea. The gas tank got "vacuumed" out first just to make sure the problem would never return & it hasn't (knock on wood). Don't know why more people don't add a screen to the sediment bowl. Maybe they do & I'm the last to figure it out. Hmph, first for everything I guess. ;v) Anyhow, I hope your endeavors in sax are going well & this year will be as good as any to try an ice cold malted.

Take care,
Mike

 

[Absent Minded Farmer]

Yep, the spring is in the governor. I'd check the carb inlet screen first, though. It's the easy fixes that'll hang you up at times. If you do have to break into the carb or governor, have the gaskets handy. If you would like to "see" what you're going to be dealing with before you dive in, check out CaseIH's parts search website (provided you don't have a parts manual). That site is handy for it's exploded views of the assemblys & such pertaining to your tractor.

I'll try to keep up on this post, but I have a gremlin or two to beat out of the hydraulic system on my 400 this evening.

Best of luck!
Mike

 

[Wardner]

I'd say the chances are 50/50. I always look at fuel delivery first. I do that by removing the small plug on the bottom of carb and seeing how long it takes to fill an 8 oz cup. Your next step would be to look at the governor and throttle linkage. If you have access to a lighted mini-TV probe, stick it in the carb air inlet and look at the throttle action while someone moves the hand throttle. Make sure the choke is open.

 

[Wardner]

That in-tank screen is a good idea. I wonder if they make one with a magnetic base so it would stay in place? Something like a air-less paint filter that fits inside the paint gun handle would work if fitted with a donut shaped magnet.

 

[the tractor vet]

Pull the bolts off the side of the gov. and see if the spring did not break. and while your at it look over all linkage.

 

[johnnykopp]

good morning,i took the screen out of the carburator and found it in good shape,cleaned it with low preasure air,i could see through it.it is open at the end,is it made that way?(that took care of the air bubble in the fuel bowl)now to open the governer,is it full of oil and will anything pop out at me?i will be doing this this morning.thanks guys all this info has been helping me alot,johnny

 

[Andrew Z]

No, nothing will come out, very simple to find the broken spring or misplaced linkage. RTV or re-gasket the cover when done.


Andrew

 

[johnnykopp]

andrew,took the cover off,the spring is not broken,i moved the throttle from top to bottom and noticed not much travel inside the governer,(there is travel with the governer spring lever)i removed the linkage from the the speed control lever on the governer and moved it by hand and did not see much travel on the rockshaft that moves the connecting rod to the throttle shaft.where do i go from here? thanks again,johnny

 

[Andrew Z]

When you have it off, check and see if you can see the stop screws hitting the low and high idle points. If you dont have an I&T manual i would locate one it will help.


Andrew