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JD 755 creep

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Hettric
Join Date: Mar 2004
Posts: 133 MA
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2008-01-29          150933


The other post on the Kubota inspired me to get around to post a question I have on my 755. In my case the hydro pedals return to "center" or neutral become "stiff" in cold weather. lubricated all linkages and pivots with synthetic grease, works quite freely in the heated garage. once out in the (minor) cold I frequently have to manually "center" with resulting jerks. (other than the one in the seat)



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JD 755 creep

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candoarms
Join Date: Mar 2007
Posts: 1932 North Dakota
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2008-01-30          150948


Hettric,

I'm not familiar with the JD755 hydro system. I have no idea how the return system works on your hydro pedal.

The problem.... failure to return to neutral in cold weather..... could be a fairly simple fix.

My neighbor's tractor has a flat bar extending from the top of hydro pivot point. There's a compression spring on each side of that bar. There is no adjustment on his tractor, so I went to the hardware store and purchased two slightly heavier springs. Problem solved.

Here in North Dakota any grease we use turns to wax at -30. Using a lighter grease wasn't going to solve my neighbor's problem, so we turned our attention to the return springs.

I'm guessing that you may be able to do the same thing, or something similar.

Joel ....


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Murf
Join Date: Dec 1999
Posts: 7249 Toronto Area, Ontario, Canada
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2008-01-30          150950


Sounds more like the same problem as with the loader control cables in the other thread.

The bottom end of the HST control cables connect to the (very) warm HST unit, and as they cool off they tend to draw in moisture from snow melted by the machines heat. As this moisture freezes it effectively reduces the amount of clearances in joints and such and makes them stiffen up.

When it's in a warm garage there is no ice, and everything moves freely again.

As was mentioned here, and in the other thread, you need to fill (and keep filled), with a very light grease such as silicone or white lithium, any cavities that the moisture can collect in so as to prevent this from happening.

Best of luck. ....


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JD 755 creep

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Hettric
Join Date: Mar 2004
Posts: 133 MA
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2008-01-30          150975


Thanks for the replies, there are no cables just open linkage. 15 to 20 degrees is considered cold here. I have the sense that it is not the linkage that is dragging, it seems free enough. I think the place to start is the springs as suggested, maybe the original springs are just tired. ....


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jdgreen
Join Date: Jul 2003
Posts: 232 Maryland
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2008-02-22          151608


The 55 series have an adjustable eyebolt that connects to the return spring. You may e able to adjust the tension on the spring to help. More likely, the pivot on the link that attaches to the other end of the spring is probably sticking. There is a grease fitting on this pivot point, but they are notorious for not getting greased often enough because it is pretty well hidden. You will probably need to disassemble this pivot point, clean and lube it then reassemble. This same pivot is mounted on an eccentric bushing that adjusts neutral. ....


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