Re: 856 park lock

Posted by K.B.-826 on December 05, 2006 at 18:55:45 from (24.180.130.28):

In Reply to: 856 park lock posted by Todd SWIA on December 05, 2006 at 17:22:13:

Like the vet says, your linkage is more than likely bent. Problem with the old style is that the linkage between the lever and the park pawl is totally solid. The park pawl drops in between two teeth on the reverse driven gear, which prevents the tractor from moving. When you engage the park lock, the pawl may hit the top of one of the gear teeth. When this happens, the lever will only move halfway down. If you then try to force the lever all of the way down, the linkage will bend, effectivly shortening the linkage, which will cause the problem you've got now. The 86 series tractors came with the new style spring loaded park pawl. Basically a very heavy spring on the park pawl. The linkage is such that even if the pawl lands on the top of a gear tooth, the handle will go all of the way into park. As soon as the tractor rolls a bit, the spring forces the pawl down in between two teeth. This style is much safer and can be installed on any of the big-frame tractors back to the 706. Like the vet says, it is a bit of a job for the first-timer, but if you've got any other issues with the range shift linkage, this will give you an exellent chance to rebuild the linkage and the parts that hang off the bottom of the range trans cover.

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