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Farmall 560 Gas Died On The Road

C

CTPhil

Member
Help! I was driving my 560 to a local tractor show yesterday and it started running rough and finally just wouldn't run at more than an idle. It starts quickly and idles but won't take the gas. So now it's sitting on the side of the road 5 miles from home. :(

I tried drygas, no luck, and changed the cap and rotor (pretty corroded), no change. It runs better for a couple of minutes after it's been sitting a while. I loosened the fuel line at the carb, there's gas, looked in the tank with a bright flashlight, no obstruction or water. I pulled the bowl plug and gas came gushing out, then slowed to a smaller stream, not sure if that's normal. It ran a little better I think for a time after I did that, but not sure it isn't my imagination.

Any ideas what to do next? It would be nice to at least narrow it down to an electrical or gas issue.

Thanks in advance!
 
make sure when you removed
the bowl plug that you have a steady stream of gas coming out and that it does not slow down. There still may be dirt in the tank or the gas filter partly plugged. Also remove the cap on the gas tank and see if that improves the flow. the vent in the cap can plug causing little or no gas to flow. Also check for a good bluish white spark from the coil.
 
The way it lost power and dieds sure sounds to me like you have crud in the needle/seat for the float. Try spraying carb cleaner in the gas line inlet but probably going to have to disassemble. Stream out the bottom of the carb through the drain needs to be steady.
 
I was troubled by the fact that the gas stream slowed down. No venting issues, the gas cap fits loosely. It has a glass bowl filter/shutoff, fairly new, and seems to stay full, so if there's an obstruction it must be in the carb. :( I was hoping to avoid carb disassembly by the side of the road, I'll try carb cleaner first.

The spark seems good but I'll take my spark tester and check again.
 
On my M there is a screen at the carb where the line connects and I just cleaned a bunch of junk from it - even with a screen in the sediment bowl.
 
Instant stops are usually electrical. Sputtering stops are usually fuel. Draining carb should provide heavy flow, not surprised if it diminishes when coming from the line only, but it should still be steady. I"d do all filters first, and backblow the fuel line. Put a filter on the top of the sediment bulb, or insert a short piece of tubing to keep the bottom tank floaters from going down.
 
A failing coil will also act that way. If all else makes no difference, and the points are set at .020", feel the coil when it quits. If it is way hot, it is failing. (way hot is = to burn your fingers. Jim
 
Thank you for all of the replies.

I didn't know about the inlet filter, sounds like a good place to start.

I was thinking about blowing back the line.

I did feel the coil, not hot.
 
(quoted from post at 10:35:41 09/25/14) On my M there is a screen at the carb where the line connects and I just cleaned a bunch of junk from it - even with a screen in the sediment bowl.
Click to expand...

Same on my 560 gas, kind of a rolled up screen in the inlet to carb. Give that a shot.
 
I had this problem with my 560G. Did everything that was mentioned. Last resort I took the tank off had it steam cleaned. Problem gone! Just a fly in the tank can cause this. I checked with a light also. I had leaves in the tank and flies. They shift when moving and will cause this problem. It is a pain to do this butif it fixes the problem, it is well worth it. Little if any cost to do this!
 
Update: I took the screen out and it was indeed plugged. I put it back together, still not running above an idle. :( But now the connection is leaking, I hope it's no more serious than needing a new compression band.

I then pulled the glass bowl off the tank shutoff, it had a lot of sludge. Put it back on and turned the fuel on, it filled up quickly, but the bowl gasket was leaking and I couldn't get it to stop and in trying bent the bowl stud. So now my roadside repair will include a new fuel shutoff also. I did also notice more gunk came down when I turned the fuel on. If I can find a plain shutoff without a bowl, I have half a mind to replace the whole line with rubber hose and an inline filter.

It's not looking good for the 560 making the show this weekend.
 
Inline filters can cause problems with air locking and cutting off
fuel flow. In my opinion better than the alternative of getting
crud in the carb. It's something that you need to be aware of if
you are going to do that. I usually don't have problems with
mine till I run out or low on gas.

As for your tank a good pressure washing on the inside should
help a lot. You can do it right on the tractor. If you have rust
inside you will want a standpipe or screen on the inlet of the
sediment bowl. But to make your show this weekend you could
get by with a good cleaning.
 
I'm wondering if a fuel tap like the one on my 70's Fords would be the same tank thread. If so, they have a screened standpipe already on them. I may just go that route, I have the glass bowl taps on a number of machines and pretty much hate them all, lol. There are a couple of rust spots inside the tank but all in all it's surprisingly good for it's age. The hard part is going to be draining and capturing the gas working beside the road. I'll need to think hard and be sure to have everything I need. :)
 
Mission accomplished! The 560 is sitting in it's spot at the tractor show. :)

The shutoff from a Ford without the glass bowl has a bigger thread, so I bought a replacement bowl assy at TSC. Also bought a bunch of fittings, i already had hose and filters.

I robbed the bowl, gasket and bail from the new shutoff assembly, so i didn't have to drain the tank on the side of the road. The old bowl gasket looks like someone made it with a pocket knife, lol. a new compression sleeve at the carb, turn on fuel. Fuel bowl dry, big leak at the carb. Something's buggered at that fitting.

So after numerous attempts, and another trip to the auto parts store I cobbled up hose barbs at both ends and put in a rubber line with inline filter. 1/4" pipe thread into 1/4" tubing thread, lots of teflon tape. Not right, but it doesn't leak. :)

A heartfelt thanks to all for the replies and suggestions! :)
 
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