REAL position control

[GordNovo]

There's an active post going on in the Buying/Pricing forum regarding Postion Control and it got me thinking....

The one think I wish the "position control" had on my 2520 is the ability to lock it in into the lowered position. Unless I weigh my box scraper down with 16X16X6" cinder blocks, it tends to float right over the ground when I'm trying to "scrape".

I find I have the same problem with my middle buster when I'm cultivating the garden at the end of the season. Only problem there is I can't balance the cinder blocks on the plow, so I need to get the 'wife's help'.. he he .

GN

 

[JDFANATIC]

There's an active post going on in the Buying/Pricing forum regarding Postion Control and it got me thinking....

The one think I wish the "position control" had on my 2520 is the ability to lock it in into the lowered position. Unless I weigh my box scraper down with 16X16X6" cinder blocks, it tends to float right over the ground when I'm trying to "scrape".

I find I have the same problem with my middle buster when I'm cultivating the garden at the end of the season. Only problem there is I can't balance the cinder blocks on the plow, so I need to get the 'wife's help'.. he he .

GN

Gord,

Real position control has no effect over float -- where the 3PH is designed to hover over ground contours. As far as I know, only a few tractors have down-force on the 3PH and none will be on your big-three list.

 

[GordNovo]

Gord,

Real position control has no effect over float -- where the 3PH is designed to hover over ground contours. As far as I know, only a few tractors have down-force on the 3PH and none will be on your big-three list.

Thanks JDF, that's what I was thinking.. oh well, it's just a pain in the butt when I gotta hoist the extra weight onto the box scraper.

However, I just dble checked the manual, it seems to give the impression that the Rate of Drop/Lock valve would enable you to lock the position of the 3ph. I know it's referring to the drop lock, but maybe it'll lock in the upward position?!?

"Using Rate of Drop/Lock Valve The rate of drop/lock valve controls the rate of rockshaft drop when the rockshaft control lever is operated. This provides direct rate of drop control for 3-point hitch mounted implements. The valve can also be use to hydraulically lock the rockshaft (three-point hitch) in a desired position."

Hmmmm.. I've have to give it a try tomorrow (unless someone's really itchin' to find out tonight, and can convince me to crawl outta bed, put on my winter gear and go find out tonight!?!)



GN

 

[JiminGa]

Gord, I don't think it'll work, but heck give it a shot...what have ya (or we anyway) got to loose? let us know how it works out

 

[slipshot77]

You have probably been plowing longer than me but, Your middle buster or plow should pull itself in the ground. No weight needed. When plowing the point of draft is always changing with the terrain so it needs to float to maintain a constant depth. The only tractors I've ever had that had down pressure were Internationals with the two point hook. Just hang some extra steel on your scraper and run with it.

 

[GordNovo]

Well I got my wish today.. snowfall and high winds last night caused fairly significant driffting when I got up. Kids couldn't go to school and I couldn't go to work , but I was chained to the work laptop for the whole day unfortunately . Finally made it out the tractor after dinner... in the dark.

Turns out that even with the Lock Valve shut, the 3ph still floats up. Oh well.. guess I gotta keep on with the cinder blocks.. no biggie.

If I ever get a chance to ask a JD product engineer the question of why the 3ph can't be locked in the down position, I'll be sure to do so. Anyone have any thoughts?

Gord

 

[JiminGa]

I think that pump is one way, and the valve somehow shuts off flow to the pump keeping it from lifting...if that makes any sense

 

[jdbower]

I'm pretty sure the 3PH mechanism just pushes up on the side arms which rest on the end of the lift arm. This is desirable for most operations to allow for some amount of float, adding a "lock" mode would mean that they'd need to have some sort of a strong connector to this lift arm which would also be able to be disabled. Not an easy task but certainly doable, for a price... Remember that this connection would have to be able to support the full weight of the tractor or have a good relief valve setup, someone can easily push down on a middlebuster and end up in a bad situation.

 

[jd110]

I believe the reason for no down pressure is the lack of traction. If you put down pressure on the implement, it will try to raise the rear tires off the ground. As slipshot77 says, a well designed and properly adjusted plow tends to have "suction", it will pull itself down and it is up to the tractor hydraulics to keep it from going too deep. If you have adjustment either on the plow itself or your top link to change the angle of the shovel, you might get it to work better.