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D15 - Traction Boost Question

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MapleStone99

05-28-2007 06:33:06




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My father and I were trying to use his new D15 with a 3 pth cultivator the other day but the tractor kept trying to lift the cultivator out of the ground. The only way I could get it to stay down was to drive in left hand circles. I then adjusted a stop bolt under the tractor so that the linkage couldn't move much and it was a little better but not great.

Being completely new to the Dseries and Allis controls I'd better explain how we were using it. The top lever on the left hand side was set all the way back. If we moved it at all the cultivator would pick up and not lower. The bottom lever we would pull back to lower the cultivator and then return it to the middle position. to raise the cultivator we would push forward on the bottom lever.


The seller has an operators manual but we forgot it when we picked up the tractor and I'm about to get a service manual.

Your help and suggestions are appreciated.

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Dave Anderson

05-30-2007 17:41:52




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 Re: D15 - Traction Boost Question in reply to MapleStone99, 05-28-2007 06:33:06  
Sounds like you need to adjust the traction booster linkage. I used to know the procedure for doing it on a snap coupler tractor, but on a 3 point its probably a little different. I believe you need to look for the adjusting bolt under the center of the tractor, probably a little toward the right side, at the hydraulic pump compartment. Get an operators manual-its covered in there.



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Texas Denny

05-28-2007 19:07:39




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 Re: D15 - Traction Boost Question in reply to MapleStone99, 05-28-2007 06:33:06  
Symantics are going to get us in trouble. My definition of lever movement is up and down rather than forward and backward. On my D series tractors, the operation is almost vertical.

Anyway, the lever closest to the steering wheel is the traction booster control. In most case, you want this lever all the way down. The lever closest to the gas tank is the lift lever. To lift, move this lever up until it begins lifting. When the implement is at the desired height, move it back toward the middle of travel. At some point as you move the lever down, you will feel a little resistance and possibly a feel of a click. You need to rotate it down until you feel the click. When the click happens, the control is no longer calling for the system to lift and it is now in hold position. When you put the implement in the ground, move the lift lever all the way to the to the bottom and leave it there. If the implement is going too deep, raise it to the desired level and bring the lever back to the click position. If you having trouble keeping it down, leave the lever down.

In the event the hydraulics are not set for "lift and hold" operation, and you want lift and hold, I recommend getting an operators manual.

If you are using Allis snap coupler implements, you can use the lever closest to the steering wheel to transfer weight from a plow or some disks to the rear wheels of the tractor. If you don't have snap coupler implements, the Traction Booster usually will be of no value. Most 3-point hitches will not effectively use Traction Booster.

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Marc in Va

05-29-2007 06:46:22




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 Re: D15 - Traction Boost Question in reply to Texas Denny, 05-28-2007 19:07:39  
Texas Denny has given you some excellent advice. I would just like to add my experience with my D-15 regarding using the traction booster with 3 point implements. The traction booster worked VERY well for me using a 3 bottom, 3 pnt plow (3-14) in hard sod. Mind you, this was a tractor with FACTORY 3 pnt hitch. 3 point conversions might not work as well. Enjoy your tractor!
Marc



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Texas Denny

05-29-2007 07:04:22




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 Re: D15 - Traction Boost Question in reply to Marc in Va, 05-29-2007 06:46:22  
Yes, the latest versions of D-15 and D-17 had a factory 3 point hitch - the traction booster should work fine with them. I was referring to the after market three point hitches which all of my tractors have. The after market versions usually do not allow the traction booster to move so it can not sense load and weight transfer.



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MapleStone99

05-29-2007 07:13:26




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 Re: D15 - Traction Boost Question in reply to Texas Denny, 05-29-2007 07:04:22  
Thanks for your advice.

The tractor is a 1966 D15 with factory 3 pt. It sounds like we were using the levers properly but the tractor wouldn't leave the cultivator in the ground. The traction boost lever was indeed all the way down but it still kept lifting the cultivator.

The one thing that I didn't mention is that the adjustable arms were at some time broken and welded and the cultivator wasn't perfectly level when lifted. We didn't feel this would make much difference for cultivating but maybe that wasn't helping.

Thanks again.

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Texas Denny

05-29-2007 11:44:51




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 Re: D15 - Traction Boost Question in reply to MapleStone99, 05-29-2007 07:13:26  
If both levers were all the way down, and the cultivator came up, the cultivator may need weights to hold it down in your soil. In most farming soils, the cultivator pulls itself into the ground. In your memo, I remember that you had the lever toward the gas tank in the middle position. It should be all the way down if you are having problems with the cultivator coming up. If you drive the tractor around without the cultivator mounted and the arms stay down, the hydraulics aren't bringing it out of the ground.

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MapleStone99

05-29-2007 12:36:47




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 Re: D15 - Traction Boost Question in reply to Texas Denny, 05-29-2007 11:44:51  
It was definetly the tractor raising the cultivator as it would raise the front tines right up in the air. (Our top link was too long at the time.)

We would have to hold the lever in the down position and that wouldn't help. It would raise up to a certain point then try and go down then raise back up.

Our soil isn't hard and we've had this cultivator for over 30 yrs and it's always worked with every other tractor.

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Texas Denny

05-29-2007 14:56:46




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 Re: D15 - Traction Boost Question in reply to MapleStone99, 05-29-2007 12:36:47  
Do the arms stay down when you are diving the tractor without the cultivator?



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