info and a question

JD 4020 hydraulics. This is news to me but I have never owned a JD as late a model as a 4020. This question and answer is from the Aug. issue of the Progressive Farmer. Writer said after turning off his 4020 to fuel it, the starter would spin slowly and then spin faster. Answer was that the 4020 has a closed center hydraulic system which maintains 2000 pounds of standby pressure. When there is no hydraulic demand, the pump does not pump oil and so requires very little hp to turn. When tractor was cut off for fueling, the tractor is at standby pressure. During the time spent fueling, the pressure leaks down some. When the starter is engaged, the pump tries to restore the lost pressure. Before the tractor starts, standby pressure is reached and the pump stops pumping(going out of stroke it is called) and the starter can spin the tractor faster. Some people jerk the steering wheel back and forth when starting which dumps hydraulic pressure making the tractor easier to start.


Question on another subject: I have been told that those rattle devices with a flat plastic container on the end of a handle work better at driving cattle than a hot shot. What is the reason given by for them working to drive cattle?

KEH

I don't think there's a 4020 around that maintains ANY main system hydraulic pressure for more than a few seconds after shutdown, due to LOTS of little "leaks to sump".

However, it IS true the pump will try to build pressure when you hit the starter button.

For situations where this is a problem, DEERE makes a "electric hydraulic pump destroke kit" that keeps the radial piston pump "out of stroke" while the starter is operating.

to solve the 4020 problem I always just set the hyd levers to float this will take all the pressure off the system .
and think about the prob vs a little whip they respond to noise better than several thousand volts .

Cattle all respond to how they have been worked. We work with our cattle regularly so they know who we are and are about as easy to work with as any cow is going to be with just a normal stick and a good hollar when they start going the wrong way. As was said earlier, they respond better to noise than shocks.

I hate seeing people who never spend any time with their cattle, come out with a prod when they decide they need to do something with them. From my experience, all shocking them has ever done was make them mad. Pretty much like it would do me or you.

Just my $.02

There is a $15.00 manual destroker as well.

If I shake a noisemaker in front of your head, tap you with it, you will be annoyed. But you will notice me, pay attention to me, and maybe do what I'm asking, just to stop the commotion.

If I jab you with an electrified rod & make you jump in pain, you will be angry, and looking to get away from me. You won't really want to do what I want you to do - you will just want to get away from me, whatever direction you think is the best - possibly through or over the top of me even.

You can work over cattle, or work with cattle. I find working with them ends up being faster & less tramma for both of us. Some days are going to be difficult either way.

--->Paul

My dad had a 4010, a 3020, and later a 4020, so I have spent hundreds of hours on those tractors. I do remember having to jerk the steering wheel because the starter would not spin. One or two quick jerks and all was well. Never knew the details of the problem other than it was related to the hydraulics.

Other folks have covered your hydraulic question(s); I guess they've answered your cattle prod question,also, but I'll chime in. (They don't shock, btw, at least the ones I've used; they burn). If you're dealing with cattle who all have names, I doubt that you need a 'hot shot'. I would never use one to 'drive' cattle, no matter the circumstances, but.........if you're dealing with range cattle that are only corralled/worked 2 or 3 times a year, a hot shot can be a definite asset, ONLY when she's in the chute and balks about going further.......usually just as she's about to enter the head gate. One jolt in the rear........WHEN SHE'S HEADED IN THE RIGHT DIRECTION can save a lot of frustration for you and her. There was a young lady (from Colorado, as I recall) who wrote for one of the cattle magazines a few years ago and published numerous articles about getting cattle to move forward in the chute by placing herself near their shoulder and moving backwards and forwards a couple of feet. She had extensive studies to back her up and with the right cattle, I'm sure her approach worked, but I'd loved to have seen her try it in the real world, where you've got a couple of hundred head of bawling, upset cattle who are separated from their cavles.........

Thanks for the replies on the cattle handling. I never use a hot shot except when the cow is in the chute and balks. It appeared to me the time I saw the rattle used that it could help getting the cow to go in the diirection of the chute to begin with. BTW,I've had the best luck loading cattle by getting them in a barn and loading them in the trailer which is outside. I have one loading facility set up that way and it worked fine. The cows seem to think they are escaping when they are going from a dark to a light place. One local stockyard has a flood light aimed toward the trailer for night loading, maybe the same idea.

KEH