Power Beyond Installation

[RobS]

Aha! My ignorance has caught up with me... or I've learned something today and I can now go home. It seems the PB plumbing for the 4XXX series is entirely different than a 790. Now I'm very curious, but since I can go home I'll take my curiosity with me.

Interesting, there isn't a "blue-green-yucky-color" font choice here on TBN. Is that intentional?

/forums/images/graemlins/smile.gif

 

[rockyridgefarm]

OK, the 790 is WAY different! - we are learning together!

 

[RobS]

Hey, that looks familiar.

Getting back to the original post, I think it's still safe to assume that a person of average mechanical aptitude could install his/her own PB kit. It will likely require a good bit of disassembly/reassembly but nothing overly difficult.

Thanks for the education Mike /forums/images/graemlins/smile.gif

 

[kennyd]

I did mine on the 4110, took about 3 hours or so to get it done. wasn't all that hard, but there was some tight spaces in witch to work in.

 

[HobbleCreek]

Thank you both for a hugely helpful thread. I'm not certain that I qualify as a person of average mechanical aptitude.

In answer to Mike's question, I am installing the PB to power my backhoe. When I bought the tractor and the hoe my dealer suggested an alternative to the PB that would be much cheaper and that he thought would work just as well. He said that if I later wanted the PB I could add it and I'm pretty sure that I confirmed with him that it wouldn't cost me any extra to add it later. That does not now appear to be accurate.

Here's what we did to avoid the cost of the PB initially. I connect the hoses on the BH to third SCV (which I take it is the blue lines in the diagram). To power the BH, the dealer installed this little wingnut on the lever that controls the SCV --

I push the lever down into the forward position and then tighten the wingnut to hold it in position. While we're on this subject, and I have the attention of some guys who obviously know a whole lot more about this than I do, what are the disadvantages you see to this setup? Am I not getting as much power to my BH as I would with the correct PB setup? More importantly, am I risking any damage to the tractor?

With this setup the loader does not work unless I drop the SCV control lever into the "float" position, thus disengaging power to the BH. I have to do the same to raise or lower the 3PH arms which is sometimes an issue when attaching or removing the BH. With the PB installed would I be able to manipulate these features while the BH still had power?

Thanks again for all your help.

-- Grant

 

[rockyridgefarm]

I think you should get the PB, pronto.

The 3rd scv is designed to accept a high pressure return to the valve. The hoe is designed to return via a low pressure line to the sump resevoir.

The 448 is a real workhorse, and I think you are in danger of overheating the system.

I think. I am not an expert, and I hope some will chime in and correct me if I am wrong. But I bet that most will agree that you should get the PB.

And I tought that the PB was cheaper than the 3rd scv....

 

[rockyridgefarm]

Did you order the tractor, or was it already on the lot? Did it already have the 3rd scv or did they add it?

I am sorry to say it, but I think they sold you what they had, without regard to a proper application, and have jacked the price to keep you from getting the right product (so they don't have to mess with installing it...)

But it may damage the equipment.

There are plenty of users who try dumb things with their equipment ( And I may at times be just that kind of guy!) But dealers shouldn't fit in that group.

Is this an Ag dealer or Lawn and Garden?

Maybe another dealer would be the best answer...

 

[HobbleCreek]

I ordered the tractor, but I think they still would have had to do the install because it is (I believe) a dealer install item.

As for classifying the dealer, I'd say they're in between. They don't carry JD's full line of Ag tractors, mostly the compact utlities like mine and smaller--one or two on the lot that are a little bigger. They didn't have any 4720s when I ordered mine late last fall.

I wanted the 3rd SCV regardless of whether I got the PB. You're right about the price being higher. The PB Kit is a $232 add on the JD configurator, the 3rd SCV adds $329. Here's my take on what happened. When they ordered the tractor, they did not include the PB kit, depsite having ordered me a backhoe. When they faxed me the specs, I noticed that it didn't mention the PB and I asked them about it. I wonder if the tractor had already been ordered and couldn't be changed at that point. Either way, they said they could add the PB later. I don't want to take advantage of them, but I do think they ought to put the PB on for the same as it would have cost to have it added from the beginning.

Thanks again for your insight.

-- Grant

 

[RobS]

I'm not going to pretend to know enough about the hydraulics to say for sure, but I suspect Mike is right and the PB is the better way to power the backhoe.

Since you got the tractor from this dealer and they perhaps set it up "wrong", maybe you can negotiate to pay for the parts and have them do the install on their nickel? Best case, the parts come in at dealer cost but that will depend on your relationship with the guy. I'd push pretty hard, even call zone people if you have to. Everything I've ever seen about JD hoes mentions PB. I've never seen any Deere publication recommend running it through an SCV.

Good luck and let us know how you fare. It's been a lot of fun trying to help /forums/images/graemlins/smile.gif

 

[kennyd]

Grant,
IMHO, and take it for what its worth, your dealer has let you down. The wingnut is cute, but NOT the way to power a backhoe. I think your dealer is in way over his head.
I would go there and raise heck about it...try to get them to sell you the PB at their cost, and do the install yourself.
You will be so much happier not having to fiddle with that wingnut just to move your FEL or 3PH you'll smile from ear to ear /forums/images/graemlins/grin.gif

Didn't we talk about this about a year ago when you bought the tractor, or am I having deja' vue all over again /forums/images/graemlins/confused.gif