Hydraulic for PHD ?

[G McCall]

OKAY.......

Regarding my Bush Hog Down Force Kit for my Bush Hog Model 2102 Post Hole Digger, here is the Final Solution per my Local Dealer.

First of all some parts come with the Down Force Kit that I did not need.
Specifically the relief valve and the extra hose and couplings that go with the relief valve. Dealer said I do not need the relief valve as my Kubota tractor already has a relief valve built into the factory hydraulic system on the tractor.

With that said the (same) dealer gave me one hose with the system, but discovered they should have given me 2 hoses. They gave me the other needed hose yesterday.

They said connect one end of each hose to the hydraulic cylinder ports of the Down Force Kit and connect the other ends of the hoses to the 2 hydraulic outlets at the back of my Kubota tractor. One port is an "out" and one port is an in (return). They said it will not matter which port a hose is connected as the kit will either go up or down by the control lever. If the kit does not raise when you raise the control, switch the 2 hoses at the tractor ports.

I could have installed the system from gregkabob's pictures, and I'm sure all would have worked, so thanks again for all the advice.

I may not get to the install for a few weeks, but soon I hope.

 

[MtnViewRanch]

OKAY.......

Regarding my Bush Hog Down Force Kit for my Bush Hog Model 2102 Post Hole Digger, here is the Final Solution per my Local Dealer.

First of all some parts come with the Down Force Kit that I did not need.
Specifically the relief valve and the extra hose and couplings that go with the relief valve. Dealer said I do not need the relief valve as my Kubota tractor already has a relief valve built into the factory hydraulic system on the tractor.

With that said the (same) dealer gave me one hose with the system, but discovered they should have given me 2 hoses. They gave me the other needed hose yesterday.

They said connect one end of each hose to the hydraulic cylinder ports of the Down Force Kit and connect the other ends of the hoses to the 2 hydraulic outlets at the back of my Kubota tractor. One port is an "out" and one port is an in (return). They said it will not matter which port a hose is connected as the kit will either go up or down by the control lever. If the kit does not raise when you raise the control, switch the 2 hoses at the tractor ports.

I could have installed the system from gregkabob's pictures, and I'm sure all would have worked, so thanks again for all the advice.

I may not get to the install for a few weeks, but soon I hope.

If it were me, I would install the relief valve as per Bush Hogs instructions. Your tractors relief is a lot higher than the valve that came with your kit. That Bush Hog relief is set lower so that you don't end up hurting something on the phd. I know that mine is set at 1500lbs, but my tractor is up over 2500lbs. And as far as how your dealer is telling you to hook this thing up, DON'T DO IT that way. You will end up bending something. They have you setting up your hydraulic cylinder as if it were a double acting hydraulic. It is to be used as a one way hydraulic only and that is one of the reasons for the Bush Hog relief valve. You really need to plumb as per the Bush Hog directions. READ THE DIRECTIONS, you will see that your dealer is telling you the wrong thing to do. If it is installed improperly, you will bend parts of your phd. There is a reason that the down force kit is the way that it is. Please, please, please install per manufactures instructions.

Good luck

 

[G McCall]

Uh oh

Well, we can still use the relief valve as long as the dealer is right that one of the outlets on the back of the tractor is a return line, or is that not right ?????

 

[gregkabob]

I agree with Brian, Hook it up per the BushHog instructions.

 

[G McCall]

Haa

I would have done that in the first place, but the Bush Hog instructions say to connect one line from the relief valve to the Hydraulic reservoir... and that is where I was stumped. I did not see any plumbing access to a hydraulic reservoir. I am told to use one of the lines at the back of my tractor for the return.

Of course I was also missing one of the hydraulic lines, but now have it.

 

[MtnViewRanch]

Haa

I would have done that in the first place, but the Bush Hog instructions say to connect one line from the relief valve to the Hydraulic reservoir... and that is where I was stumped. I did not see any plumbing access to a hydraulic reservoir. I am told to use one of the lines at the back of my tractor for the return.

Of course I was also missing one of the hydraulic lines, but now have it.

Do not do this. Your rear remotes run through a control valve. The fluid needs to return directly into either a main return line to the reservoir or directly into the reservoir. You may need to get a hydraulics schematic of your tractor to do this, but that is what needs to be done.

I don,t want to be brash about this, but it sounds like your dealer does not know how and has never done a down pressure kit before. The dealer has told you a few things to do that are hands down wrong.

First install the kit on your phd as per Bush Hog instructions. If you are missing a part, then go to the place that you bought it from and get the part, after all you did pay for the correct parts, right.

Second, locate a main hydraulic return place and plumb for a quick disconnect for the return line of the down pressure hydraulic.

Third, now you can plug the pressure line of the down pressure hydraulic into one of your rear remote outlets.

If you want (or may need to if your ground is very very hard) the valve can be held open so that you have constant down force with the hydraulic. The Bush Hog pressure relief valve allows you to do this, you have constant pressure being applied while the excess fluid bleeds off and returns to the reservoir. The tractor system is not loaded because the Bush Hog relief valve is set at a lower pressure than a tractor system is. You can screw up and accidentally pick up the phd while down force is being applied and all will be ok because the relief allows for this. When you are done with your hole, release the control valve, raise the phd and the hydraulic fluid returns to the reservoir automatically as the hydraulic is compressed (retracted) as the boom is raised.

I hope that this helps you some, I just hate to see you install this wrong and have serious problems. One last thing, all that I have told you is based on what I learned from my Land Pride unit.

Good luck

 

[banjodunn]

G'day Brian i hate to disagree with people i have never met but the last thing you want to do is to run hyd over relief all the time which is what you are saying to do, that is the quickest way to destroy oil as you will heat it excessively in no time , also ther should be no reason that you cannot hook straight up to your tractor remote hyd as the operation of the ram is double acting you lift it up and down on hyds you should only need to move the lever to operate if you strike a hard spot or you need to initially break into the ground , using the tractor relief should be fine you should not have to run a seperate valve, now that i've had my grizzle the idea of using a high flow coupling direct back into the hyd reservoir is something we only do to post drivers as you need to get the oil away fast from the dolly ram so it hits the post nice and hard anyhow enough from me good luck with it all

Jon

 

[G McCall]

It appears some of us have different opinions, but to be safe, I plan to install the supplied Relief valve.

The only question that remians is where I can find a suitable return line source. Sounds like I need to verify if one of the outlet lines on the back of my tractor is a suitable return line.

 

[Eric_Phillips]

If you look on the valve supplying the rear remotes there should be two lines coming out of the valve. One of those is the Power Beyond going back to the 3PH. The other is the return going directly to tank. That one is most likely labeled with a T on the valve - this is the one you want to tee into.

 

[G McCall]

If you look on the valve supplying the rear remotes there should be two lines coming out of the valve. One of those is the Power Beyond going back to the 3PH. The other is the return going directly to tank. That one is most likely labeled with a T on the valve - this is the one you want to tee into.

Thanks Eric, I will take a look at that when I get back to my land ..and tractor.