1968 Farmall 656 issues

[adisiwaya]

First we got this tractor from her great grampa who got it in 1970. Got it cheap and I've been fixing things constantly on this. Wiring is a main issue as well as the carb. I got a reman 706 carb on there ran fine. Now it is hard to start and then dies after a while. I'm getting good fuel through the line now I'm just lost. I did switch over to electronic ignition. I put new fuse in there as original was removed. When it dies it's almost like it loses spark and fuel. There isn't a fuel shut off solenoid on this carb. Need some help some path to look at or pointed into a direction to look. This is the first tractor I have owned and pretty new to them. I've worked on my Peterbilt and Kenworth so I'm pretty mechanically inclined just not use to old carbs and red power

 

[BarnyardEngineering]

The fuse is for the lights. It has nothing to do with anything else.

If you think it's dying due to lack of fuel, check fuel flow when it dies. If you think it's losing spark, check spark when it dies.

 

[Roger Tomfohrde]

Do as Barnyard recommends. A question is the ballast resistor in the electrical circuit by the coil, not sure about the 656. There might be a case where you do not have the 12 volts all the time to
the electronic ignition. Might have to go through the wiring again to make sure it is correct, coil, wires to plugs etc.

 

[adisiwaya]

(quoted from post at 04:54:40 07/20/22) The fuse is for the lights. It has nothing to do with anything else.

If you think it's dying due to lack of fuel, check fuel flow when it dies. If you think it's losing spark, check spark when it dies.

The fuse is the sand fuse resistor? That's what I meant. Guess I'll be tearing the carb apart and blowing the lines out again hopefully just a fuel issue

 

[caterpillar guy]

Pull plug on bottom of carb and see what your flow is if it does not flow a good flow plugged between there and the tank. IF no spark check for spark at points then at plugs. If no spark at points look for a connection touching the case on the distributor or an open circuit in the wirng from battery to coil to dist. check for adequate gap at points with lobe on point arm.

 

[used red MN]

Hello Adi welcome to YT! I suppose you know that part
17 in the attached diagram where the fuel line attaches to the
carb has a fine screen that can plug. Check it out.
CNHI C 263 carb diagram

 

[naedlaen]

Good fuel flow can be intermittent. There could be crud in the tank that blocks the flow occasionally. Recently had the issue on the 460. I could keep it running with the choke until I returned to the barn to tear into it. All kinds of junk, even in the petcock orifices.

All other suggestions are worth checking as well.

Neal

 

[adisiwaya]

(quoted from post at 17:52:28 07/20/22) Good fuel flow can be intermittent. There could be crud in the tank that blocks the flow occasionally. Recently had the issue on the 460. I could keep it running with the choke until I returned to the barn to tear into it. All kinds of junk, even in the petcock orifices.

All other suggestions are worth checking as well.

Neal

That's what I'm worried about. Going try to drain the tank Friday and see if there's gunk in the tank. Can't wait to move to get that loader off so I can boil out that tank

 

[adisiwaya]

Okay I'm starting to think it's fuel issues with line restriction from the tank. Jump started it today and been running no choke last 20 minutes. I did go over area that's like chiseled plowed in winter. Been running low idle last 20 minutes no issues. Ran pto and didn't kill it. I have swapped out fuel filter on it too a large see through one. So when it stops raining going swap the glass sedement bowl out with a new one completely drain the fuel tank and hope some gunk comes out of it. I have a loader and cab on it so I can't easily take the tank off or the front tin