adding rear hydrauics for TNT on a 110 tlb

jenkinsph · Mar 9, 2015

disney said:
thank you!

Yes I will still have front aux, as this does not touch the fel aux circuit at all. When it is connected (backhoe off) it basically replaces/simulates the backhoe valve block (but with only two circuits instead of 6/7). When the 'hoe is installed, the hose loops back onto itself to keep everything clean (just like the 'hoe hose when you remove the backhoe)

Questions for you (if I may). Do you have any contact between your tilt cyl, and the pto shield? When the 3pt is completely lowered, and the ram extended, the cyl wall hits the shield. I just trimmed the shield a little, but as I have the oem TnT, wondered if that was normal?? I also can have some (light) contact between the top cyl 90 degree hose elbow/fitting at the cap end, and the rockshaft arm?? Neither of these should have anything to do with my install (as far as I am concerned) because I am using the oem deere TNT 'kit' , which I believe is oversized for the TLB.

I don't recall any problems with the tilt cylinder contacting the pto shield. It has been a couple of years since I used it on the 110 though. I have my hoe off right now changing all the fluids, I will see if it is an issue in the next few days and let you know.

disney · Mar 9, 2015

MtnViewRanch said:
Are your couplers big enough to flow the 110's GPM hydraulic flow? Is the valve big enough?

I am not a fluid power systems engineer, but I am going to say yes. The couplers that go to the new valve are 5/8 body #10 sae/orb, the exact same that deere uses for the backhoe connection. The hoe is rated for 14.9gpm, whereas the main pump only outputs a max of 10.5gpm. (the difference is the aux pump flow is directed to the hoe when attached, or the rockshaft when the hoe is removed.) Now the only hose I added is 1/2" diameter and less than 2ft in length. That should be fine for 10gpm. I would have gone larger, but bend radius, and clearance comes into play. Now technically the valve is not quite 'big' enough as it is only rated for 10gpm, but the tech specs in the 110tlb service manual state pump output should be between 8.4 and 10.5 gpm, so AT MOST, I might be undersized by .5gpm, or 5% over rated flow. Please note I have no intent to be rude in any way (you have helped so many, including myself), I just wanted to state my case I guess.

jenkinsph · Mar 10, 2015

disney said:
I am not a fluid power systems engineer, but I am going to say yes. The couplers that go to the new valve are 5/8 body #10 sae/orb, the exact same that deere uses for the backhoe connection. The hoe is rated for 14.9gpm, whereas the main pump only outputs a max of 10.5gpm. (the difference is the aux pump flow is directed to the hoe when attached, or the rockshaft when the hoe is removed.) Now the only hose I added is 1/2" diameter and less than 2ft in length. That should be fine for 10gpm. I would have gone larger, but bend radius, and clearance comes into play. Now technically the valve is not quite 'big' enough as it is only rated for 10gpm, but the tech specs in the 110tlb service manual state pump output should be between 8.4 and 10.5 gpm, so AT MOST, I might be undersized by .5gpm, or 5% over rated flow. Please note I have no intent to be rude in any way (you have helped so many, including myself), I just wanted to state my case I guess.

"the difference is the aux pump flow is directed to the hoe when attached, or the rockshaft when the hoe is removed" curious how that works, I know there is a switch that is activated when the hoe is installed, does this shift a valve controlling the aux pump flow?

For most uses I seldom run the 110 full speed, that usually occurs when in transport. Working in a field, using the loader or backhoe my speeds are between 1800 and 2000 rpm. That would be 10% below the rated hydraulic flow more or less. Assuming your plan is correct you should be okay with the valve flow you mention. It would seem your rear outlets will have the same flow as the fel circuits up front (roughly 12 gpm) less any losses. Not trying to argue, just trying to wrap my little head around the theory of operation in your set up.

On my 110 the diverter will shift between the front 3 circuits and the rear three circuits. I would assume all of these are using the 12.2 gpm pump (theoretical rating). The backhoe flow is 16.3 gpm (theoretical rating) which combines the 12.2 main pump with the 4.1 aux pump. I am asking about all of this because I am currently working on my Topcon automatic machine control set up to control my box blade, having two circuits to use on different pump sections would be ideal in an open center system. The aux pump would be enough flow to solve this I think. If not I may need to use a flow divider, just trying to understand this.

MtnViewRanch · Mar 10, 2015

disney said:
I am not a fluid power systems engineer, but I am going to say yes. The couplers that go to the new valve are 5/8 body #10 sae/orb, the exact same that deere uses for the backhoe connection. The hoe is rated for 14.9gpm, whereas the main pump only outputs a max of 10.5gpm. (the difference is the aux pump flow is directed to the hoe when attached, or the rockshaft when the hoe is removed.) Now the only hose I added is 1/2" diameter and less than 2ft in length. That should be fine for 10gpm. I would have gone larger, but bend radius, and clearance comes into play. Now technically the valve is not quite 'big' enough as it is only rated for 10gpm, but the tech specs in the 110tlb service manual state pump output should be between 8.4 and 10.5 gpm, so AT MOST, I might be undersized by .5gpm, or 5% over rated flow. Please note I have no intent to be rude in any way (you have helped so many, including myself), I just wanted to state my case I guess.

Not a problem, the reason that I even asked, is in the picture to me it looked like you had a 1/2" coupler, and I know that ALL 1/2" couplers that I am aware of are not big enough. I just hate to see someone do these things and then burn up their pump.

The other thing, in my case anyway is that as I get use to the machine, the throttle goes up and that means running the machine closer to or at it's capabilities.

I have come across people that went just a little small (10-15%) and ended up cooking the pump. A lot depends on how the machine is operated, just didn't want this to happen to you.

disney · Mar 10, 2015

jenkinsph said:
"the difference is the aux pump flow is directed to the hoe when attached, or the rockshaft when the hoe is removed" curious how that works, I know there is a switch that is activated when the hoe is installed, does this shift a valve controlling the aux pump flow?

The hydraulic schematic in the service manual shows a diverter valve that directs the aux pump flow to either the 'hoe or the rockshaft. basically if prevents the rockshaft from being raised if the hoe is attached. If the switch sticks (seems to stick on the hoe installed position) then the 3pt will not raise even with the hoe off. The numbers I posted are from the service manual, your #s are (I believe) from the sales brochure specs. Without having a flow meter, it might be hard to know which #'s are the honest #'s, but I would tend to lean toward the service specs, and away from the sales specs.

jenkinsph · Mar 11, 2015

Disney, thanks for clarifying the question about the diverter valve.

The numbers I used were from the operating manual. Notice I mentioned "theoretical" as I doubt these numbers are carved in stone.

gcfisher75 · Nov 11, 2015

I would love for you to come up with a "kit" price for this, I definitely woukd be interested!

disney · Nov 13, 2015

gcfisher75 said:
I would love for you to come up with a "kit" price for this, I definitely woukd be interested!

I have noted there appear to be two different seat mounting bases (when in the backhoe position), one is square the other is round. Mine is round, which style do you have? What year is your 110?

Zoomeroo · Sep 6, 2017

I realize this is an old post. I would like to add TNT and remotes to my 110. I really liked the way you did yours.
How well is it working. Is the valve big enough for GPM?

Did you ever come up with a kit price?
Or maybe kept a list of part numbers you used?