Posted by pete 23 on June 06, 2011 at 10:18:02 from (74.32.230.16):
In Reply to: Farmall 460D Rowcrop posted by John Athey on June 06, 2011 at 07:20:44:
It is one of two things. The valve is not centered due to broken or loose parts in valve or the actuating mechanism on the worm mechanism in the bolster is loose or worn out. You need to take the valve off below and determine if the little toggle shift back and forth in both directions the same amount and if not, tear the front apart. If it does work ok then take valve apart. They always have been some what of a pain for centering properly but normally are close enough so no problem. Older style, same mfg like used on trucks were adjustable but these are not. The nut will come loose or washer breaks or bends under that cap. I use air pressure on the bench to tell if centered. Remember though that both L and R turn ports will have flow even in centered positions so you have to decide if one if getting more than the other. I have one that I need to get to work on some fine day for a customer where it leads to the right while driveing and I think I may have to do some machining one end of the spool or the other as I have had it apart before and figured it was good to go but not so. When those tractors were new a few did steer easier one way that the other and of course we could just replace the valve under warranty if necessary. Some slipped through though as they always do.
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