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WD hydraulic pump question.

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Plow Man

09-03-2001 21:46:54




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I put our 7'Bush Hog shredder on my WD and I have the pump set to "lift and lower". Well, I want to hold it at a certain position, but do not know where or how to set the arms at a certain height. I know how to set the pump, but like to run the shredder 1" off the ground. The manual says something about a "detent" or mark somewhere on the lever quadrant. Where is that mark? If I find the mark how do you set the certain height? Or is it even possible to operate the bush hog in hold position? Thanks

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A-C

09-04-2001 20:28:41




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 Re: WD hydraulic pump question. in reply to Plow Man, 09-03-2001 21:46:54  
There should be marks on the quadrant at the lever. If not then they have been worn off probably because the plastic wear block is gone. If so then you'll have to scribe new marks and put new block on lever.



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David T. (MO)

09-04-2001 11:57:54




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 Re: WD hydraulic pump question. in reply to Plow Man, 09-03-2001 21:46:54  
The pump can be set for all sorts of jobs so be sure that it is set up correctly for the job you need to do. There should be a decal on the battery box just above the pump that shows you how to set the pump up. The pump has four manual adjustment knobs. The most commonly used set up for me is the hold position setting (in fact its the only setting I ever use). The lowest knob on the side of the pump is the drawbar adjustment ("A"). It is used for pulling plows and the like and gives traction control. Turn this knob all the way into the body detent locking the plate into position. The second knob is on top of the pump on the side linkages. This is the hold position adjustment ("B"). Turn it so that it locks the two plates together, allowing them to move as one. The third knob is also on top but on the front of the pump's hold position valve. This controls the delay lift ("C"). Turn it all the way out until it hits its stop. The last knob is on the front of the pump about half way down. It controls the rate of lift ("D"). Turning it all the way out gives you fast lift. All the way in is slow lift. (I have mine set about halfway.)

Once you have the pump setup for the job you want to do, you need to adjust the linkages. (I'm going on memory here so hopefully someone will check me on this.) First with the tractor off move the lift control to the full up position. There is an adjustment just under the gas tank on the large linkage to the hydraulic pump. Loosen this and push the linkage down to take all the play out of the pump and retighten. Move the control back to the down position. Turn the second knob I mentioned above (the hold position knob "B") into the detent in the body of the pump separating the two plates and locking the inner plate to the pump. Now loosen the smaller linkage adjust which is on the outer plate so the rod moves easily but be careful the rod doesn't slide all the way out. Now start the tractor and raise the lift to max height and shut the tractor off with the control still in max lift. Stand on the lift arms and slowly lower the lift control until the pump releases completely. (This should be about halfway down the quadrant.) Now, being careful to not move the position of the control, go back to the outer plate and rotate it so that you can turn control "B" back out of the pump so that the inner and outer plates are again locked together. Being careful to not move the control linkages, rotate the plates counter-clockwise until you feel it click into a detent and tighten the small linkage adjustment.

You may have to tweak it here and there depending on how worn your linkages are and I don't recall the adjustments for the traction boost linkages down to the drawbar (and don't use them anyway as mine doesn't even have the linkages).

Hope this helps.

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