[mcguyver]

I have a 318 when you put the lever forward about half way it will be fine for about 3 second and then it will be running wide open and it is the same in reverse I changed fluid and filter checked adjustments and tightened lever down and it is still the same do you think I might have a pump problem I also checked the checkvalves under fender pan to make sure they were popping all the way up any help will be appriciated

 

[Jds549]

Is it the same at different RPM? If you hold it will it stay or does it pull against you? Have you adjusted the shift lever to specs? Sounds like an adjustment problem. more info please

 

[dlnw98]

Hey Kevin,

Back on the transmission, right side, is an arm that is attached to a shaft on the transmission. The arm is the last piece of &#34#34;linkage" that the hydro lever moves when operating the lever. The shaft goes inside the transmission and controls the swashplate, which determines piston displacement and ultimately the speed of the tractor. The arm is held on the shaft by a roll pin. It is very common for the roll pin to break inside of the shaft, allowing the shaft to rotate inside the hub of the arm without the hydro lever on the dash being moved. This will cause the unwanted acceleration that you mentioned. I've now seen 3 or 4 tractors that had this problem. It's easy to see the arm loose on the swashplate shaft if you are looking at it closely or holding it while you move the hydro lever back and forth.

Also check for any other undue "slop" in the entire hydro linkage, from the "orange knob" all the way back to the transmission.

Good luck!



(Message edited by dlnw98 on November 26, 2005)

 

[mcguyver]

I will check the roll pin and Jerry the lever does'nt move it stays right were it is but runs wide open

 

[5020]

Ditto to Mike's solution. I would add that you should probably replace it with the correct JD part as it is different than a standard roll pin. Jess

 

[afponiky]

Mike, what a very well worded description!

It is nice to have members here that know so much!


GRP

 

[mcguyver]

Thank's guys you lead me to the right spot mine was the linkage that goes over the swash plate shaft had the roll pin holes in the linkage was warn badly so I cut a slit in it and put a 1/4" bolt in it and tightened it down so it was tight on the shaft she is just like brand-new Thank you Kevin

 

[dlnw98]

Glad we could help.

Thanks for the nice words, GRP.

 

[jdjake49]

Hey there,

I have a 425 power steering cylinder that needs to be repaired. The two members who previously did the repair are no longer performing this service.

Does anyone know of someone who now does this repair. I checked a local shop and they wanted as much as a new cylinder.

Thanks

George of Buford