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Ac d17 series 3 lift arms down speed
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Vwcountry View Drop Down
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Joined: 15 Oct 2025
Location: Ga.
Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Vwcountry Quote  Post ReplyReply Direct Link To This Post Topic: Ac d17 series 3 lift arms down speed
    Posted: 2 hours 24 minutes ago at 4:36pm
The lift arms work just fine but when you let them down you can’t do it slowly it comes down like a hammer. Is this normal thanks
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22169 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 8 minutes ago at 5:52pm
I guess, yes. What exactly are you doing that causes you to complain??  A "rate-of-drop" valve could be installed in-line to adjust oil return to the sump while not affecting raise speed.
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Clay View Drop Down
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Joined: 11 Sep 2009
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Points: 10033 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Clay Quote  Post ReplyReply Direct Link To This Post Posted: 53 minutes ago at 6:07pm
On the left hand side sheet is a one inch hole for the lowering adjustment.
This is the LIFT_LOWER Lever Linkage adjustment knob. 
Turning the knob to the to the right increases the lowering adjustment. Turning it to the left slows the lowering adjustment.
I have a series II D-17. Not sure if it applies to other series.



Edited by Clay - 50 minutes ago at 6:10pm
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Points: 22169 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 44 minutes ago at 6:16pm
That adjustment screw only works when using the Traction Booster system, like on a mounted plow. If you've ever plowed, the plow still drops like a brick at the end of the field. That speed drop adjustment screw keeps the hand lever at the top of the bottom window and meters the return oil when the TBoost system is releasing the lift pressure. Early model D-17's did not have this, and the performance of the weight transfer system was lacking. So,this feature had to be created and works well if it is adjusted correctly.
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