PTO Concrete mixer hydraulic control

[KonaKat]

I'm a newbie to this forum and have recently purchased a 2004 Mahindra 2615 with a concrete mixer setup that needs to be installed. I'm familiar with basic hydraulic function and terminology but definitely lacking in the mechanics and understanding to install the remote hardware. I've read many of the posts about remote installations and have come up with a circuit design to install a single spool 8GPM Prince DA Valve. The mixer came with this valve and a single acting cylinder plus two hoses ( 4" & 8' ).
I would like to know if this design is workable and if there are better ways to install the remote. Suggestions and advice on doing the installation would be greatly appreciated.

 

[dfkrug]

What is the "C" on the PB line coming from the AUX valve (black)? That line will be
needed for the 3-point cylinder PB.

What is the rated full flow of your implement pump, not including power steering? If
under 8GPM, that valve will work.

Have you done a search on TBN for PTO concrete mixers? There are numerous posts about
using them. I have posted about the use of the SA cylinder, and going to DA, due to
poor performance of the former.

You CAN operate a SA cylinder with a valve designed for DA if you let the pump go to
relief when dumping. I did it that way for a while. I have since converted my mixer
to hydraulic drive and FEL mount.

 

[KonaKat]

Aloha? thanks for the reply. I believe the "C" refers to the carryover plug in the PB port. Attached image: "INSTALL HIGH PRESSURE CARRYOVER PLUG FOR POWER BEYOND OPERATION. CONNECT "C" PORT TO DOWNSTREAM FUNCTION"
The rated flow of the pump is 7.8 GPM.

I did a search for PTO concrete mixer but couldn't find answers to my specific situation. The SA cylinder came attached to the mixer. Do I route the hose to just one work port on the valve and plug the other? I was also considering adding quick disconnects for more convenience.

Does the circuit as i have it drawn work and do you think it is practical using the parts that I have? Thanks again!

Being new to this tractor business brings up a lot of questions?ut sure is an exciting and rewarding project. I am recently retired and have a one acre garden, 8 tree orchard, aquaponic tank and grow beds for my veggies, and a well supplied machine and wood shop to repair things and just putter around. LIFE is GOOD!

 

[J_J]

If you are going to use the cement valve in series, then the PB From the cement valve should feed the next valve downstream.

If the cement valve is the last valve in the series flow path, then plug the PB port with no PB adapter and use the tank port.

For SA operation, either plug B work port, or run a hose from the B work port to tank.

Work port A will feed the SA cyl.

 

[KonaKat]

Thanks JJ
I redrew the diagram and added an image of the original FEL only circuit. I'm still a little confused (not unusual for me). What do I do with the"N" port from the block?

If you were adding the SA cylinder and valve would you do it this way or is there a better hookup? Maybe with a DA cylinder? I want the mixer to be easily controlled in both elevating and dumping, but would also like to use what I have. Your expertise is greatly appreciated.

Mahalo Nui Loa ( thank you very much)!

 

[J_J]

What port was the PB from the FEL valved connected to.

I suspect it was connected to the N port on the hyd block to feed the 3pt.

You will have to use the PB adapter in the mixer valve to feed downstream valves.

 

[dfkrug]

Based on your original setup (3rd picture), your Mahindra block 'N' is IN, and 'P' is OUT. So your first
diagram looks correct, and you do need the PB sleeve on the mixer valve.

Internally, the 3-pt valve seems to be connected after the Mahindra block and is the last valve in the
series of 3 valves.

 

[KonaKat]

Thanks dfkrug & J_J.... I will get some connectors and install the valve and hoses. Being on a remote island there aren't a lot hydraulic parts stores so will have to depend on the internet. I understand the Surplus Center is the place to go for parts that I can't get locally. Will post the completed installation. Again Mahalo Nui Loa to all!

 

[KonaKat]

Installation complete and hydraulics work well. Attached some images to show the new valve and connections. I found a local supplier (D&M Hydraulics) who was very helpful in sorting out the connectors. The fitting on the SA cylinder was British so I had to cut off the connector and braze a JIC male to it. All the hoses were made up with JIC fittings to simplify the installation.

The only thing that I would like to adjust is the PTO shaft joint. It becomes too acute when trying to dump so I have to lower the mixer close to the ground leaving only a foot or so. Impossible to get a wheelbarrow under the mixer when it is in the full down position. Don't know if I'm going to be able to fix this.

Thanks again for all your help!

 

[Redneck in training]

There are several holes for 3P hitch pins on the mixer (At least my have them). You have to put the pins in the holes that are in the same plane as the shaft. That way the length of the PTO shaft will will vary the least.