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WD-45 lift limit

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MIKE

08-21-2001 12:51:11




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I have a wd45 with a 3point hitch. When using a brush hog how do you limit the travel of the lift arms in the down position. I cant seem to keep the right mowing hieght. It is either all the way up or all the way down. Any help will be much appreciated. THANKS




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Jim

08-22-2001 23:37:04




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 Re: WD-45 lift limit in reply to MIKE, 08-21-2001 12:51:11  
On my tractor I made stops out of pipe to go on the hydrualic cylinders to keep them from retracting too far. I cut a slot in the pipe so that they would slip over the ram of the cylinder and welded flat plates on the ends. I machined them to lenth to hold the mower height where I want it. When I mow I just put the hydraulic handle in the down position and the stops hold the mower where it belongs.

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Harold

08-21-2001 23:37:05




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 Re: WD-45 lift limit in reply to MIKE, 08-21-2001 12:51:11  
I had a plain WD not a WD-45 with the same problem. I asked out local expert about it and as I remember it he said that these tractors were famous for having hydraulic arms that floated. My lift usually ended up all the way up or all the way down. He seemed to think that the best plan would be to plumb a secondary valve into the system that would lock the cylinders in position and hold them there. I never got around to doing this but I worked around the problem by adjusting the lowest height of the arms to the height that I wanted to mow. This wasn't entirely satisfactory.
I think the floating problem is caused by the feature incorporated into the lift which is designed to automatically raise plows a bit when the pulling gets too tough. If you decide to try the secondary valve be careful as I understand it the hydraulics on these tractors is at a higher pressure than on many other tractors. You should be certain to get fittings and a valve that will handle the pressure. Good luck.

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H. Epps

08-30-2001 21:03:10




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 Re: Re: WD-45 lift limit in reply to Harold, 08-21-2001 23:37:05  
David, Does the hold position actually hold satisfactorily for you? I have tried the hold position with very little luck. I thought that the problem might have been in my particular tractor but when I talked to the mechanic at our local AC dealership he agreed that the only way to make the arms hold satisfactorily was with an additional valve. If you have been able to make the hold position actually hold consistantly without allowing the cylinders to drift please tell me. Is there is a trick to it. Respectfully, H.Epps

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David T. (MO)

09-04-2001 12:33:36




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 Re: Re: Re: WD-45 lift limit in reply to H. Epps, 08-30-2001 21:03:10  
If the linkages are adjust properly, there is no way I can think of for the lift to creep up. If the hold position check valve has a worn or imperfect seat, the lift will drift downward. Such is my case while hogging. The hold position valve will hold the hog up for weeks at a time when the tractor is sitting, yet when she's bouncing through the field I find the hog drifting down to the skids after a half-dozen rounds about the 40. Perhaps all I need to do is re-seat the check valve ball or tighten down on knob "C" increasing spring pressure on the ball.

I'm done hogging for this season, but I'm planning to add chains anyway to give a definite (and adjustable) stop so that I can pick the hog up over an rock or stump and then drop it right back down to exactly the same height I was at before (hard to do with hold position alone). Of course this will also prevent the hog from dropping to its skids.

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David T. (MO)

08-25-2001 10:06:00




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 Re: Re: WD-45 lift limit in reply to Harold, 08-21-2001 23:37:05  
The WD line of tractors already have this secondary valve. It's called the hold position valve and is activated by adjusting knob "B" (as shown by the battery box decal) all the way out of the pump body detent, locking the two plates together. The traction boost you mentioned should be bypassed by adjusting knob "A" into the pump body detent, locking that plate down.



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Dave Grubb

08-21-2001 14:00:03




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 Re: WD-45 lift limit in reply to MIKE, 08-21-2001 12:51:11  
Do you have the hydraulics set for 'hold' position?



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