Diesel Question

[Anonymous-0]

My Mum's tractor is a Diesel (Too embaressing to state the Make) When it was started for the first time this year the throttle on the injector pump is stiff. The return spring cannot return it to the idle position without me pulling back on it. I'm not a Diesel person. So I don't want to mess with it without some advice. Do I spray the throttle on the pump with WD40 or is there a snake oil I should run through the tractor? I assume the Throttle is internally lubricated by the diesel fuel and some has gone bad and gunked it up during storage. Any help or ideas would be great as I'm not at all familar with diesel pumps and engines. I did disconnect the linkage to the foot pedal and the stiffness/binding is at the injector pump.

 

[Allan in NE]

Most tractors have a friction "clutch" on the throttle linkage. Would rather think it is this giving you the difficulties rather than the pump itself.

Just keep working with it; it will loosen up in short order.

Allan

 

[msb]

Sure would help if you got over your embarrasment and tell us what tractor model you are talking about.Use the WD 40 and see if it helps. If won't hurt anything to try.

 

[Anonymous-0]

I don't have the model # with me but it's a Kioti. Now do you see why ?

 

[Walt Davies]

Those are nice tractors, I have Kubotas but wouldn't mind having a Kioti (Coyote) They don't spell to good in Korea.
Go ahead and spray the linkage it won't hurt anything an might just free it up.
Walt

 

[Anonymous-0]

The Kioti uses a foot pedal and then there is a friction lever that pushes against the linkage to keep it at that speed. (poor setup that has proven problematic in the past) I have disconnect both of them and the throttle is still stiff. All the rest of the linkage is loose and the spring is good, unless there is another spring that is lost or broken.

 

[Allan in NE]

Spray it with panther juice and keep working it; she'll free up.

My T/A handle on my 686 was frozen so darned stiff this spring I had to use both arms and a leg to move it. Started soaking it a week before haying season and after 60 acres on that mower, it now jumps when I even look at it. :>)

Allan

 

[Anonymous-0]

Check the linkage and friction-assembly first - as Allan in NE already mentioned.

If your injection pump is a rotary - then it is lubed internally with diesel fuel - but a shaft o-ring could still be swelled and binding.

If your injection pump is an in-line, e.g. a Simms or CAV, much of the internals rely on you checking the oil level once in awhile (motor oil). And, I've seen many run dry with the owner unaware - especially with some older British IH tractors and Fords. The in-line pumps are basically an oil-filled camshaft box with little separate injector pumps riding on the cam - one for each cylinder. When they get run dry, the cam followers get stuck - and sometimes the throttle linkage.
I will also add that many of the older in-lines use air-governors and have butterfly valves in the air-intake that can hang up. I have several British/Indian Internationals like that, e.g. the B-275s with CAV inlines and pneumatic governors.

 

[Jim in NC]

OK I"ll stand up and admit I have a Kioti as well. A DK55 with a 1020 woods loader.