Front Hydraulics for Attachments

AndyMA · Nov 23, 2003

Just found these pictures in my collection and thought I'd post them to show how the front hydraulic option on the TN series of New Holland tractors work. These connectors are set up to mate with the standard connectors used on BobCat and Skidsteer type attachments. In addition to SkidSteer attachments I rent, I use then to angle my snow plow, open and close my grapple, and any other time I need a hydraulic outlet near the front of the tractor. Many times I use my 3 pt hitch log splitter by the front of tractor with out even attaching it to anything.

Andy

AndyMA · Nov 23, 2003

This picture shows how the front hydraulic option is connected into the rear hydraulics. It would be easy to fabricate a setup like this for most machines I suspect.

Andy

jinman · Nov 23, 2003

Andy, what is the silver "block" to the right of the front remotes? Is that a diverter valve? It looks like one input to two outputs, so I guess it could be a common point for both curl cylinders also. ...just curious.

DocHeb · Nov 23, 2003

Are the hoses rubber all the way from the back to the front, or is there some metal tubing interposed (like the FEL hydraulics)? What diameter is the hosing - is it larger diameter (like 3/4") to match the higher hydraulic flow of skidsteers?.

AndyMA · Nov 23, 2003

<font color="blue"> Andy, what is the silver "block" to the right of the front remotes? Is that a diverter valve? It looks like one input to two outputs, so I guess it could be a common point for both curl cylinders also. ...just curious</font>

Jim, I'm not sure abd I don't have the loader manual handy. In the quick glances I took at it and from the pictures I think i tmay be a "flow thru" block with a pressure relief- see gold thingie (technical term) at rear of block. Perhaps one of the other TN owners will know. I'll try and find my manual cuz now you have me curious. All I know is the loader works great and I never feel it pressure relieve.

Andy

AndyMA · Nov 23, 2003

<font color="blue">Are the hoses rubber all the way from the back to the front, or is there some metal tubing interposed (like the FEL hydraulics)? What diameter is the hosing - is it larger diameter (like 3/4") to match the higher hydraulic flow of skidsteers?. </font>

Doc, the hoses are rubber all the way. They are the same size as the rest of the loader hoses, which is larger than on my 2120 or the TC's but not as large as a SkidSteer attachment. The connectors are SkidSteer size. The pump capacity of my TN is 16.9 gpm and I'm sure the hose can handle that. When using SkidSteer attachments I need to select what are called "Standard Flow" attachments. Also remember in a series circuit, the limiting factor is the most restrictive point and that has already occurred at the tractor before it goes into this hose.

Andy

MadReferee · Nov 23, 2003

If your FEL uses 3/8 inside diameter hose then that should be ok for any other hydraulic lines. If it is 1/2 then thats what should be used throught the main supply system. Work ports, on the other hand, can and typically do use a smaller dia hose depending on the application. However some hydraulic professionals use the next biggest size in the return to tank circuit for safety reasons in case a relief valve pops.

I find it interesting that the picture shows both a 3/8 and a 1/4 inch disconnect. Is this just a picture illusion?

AndyMA · Nov 23, 2003

Yes it is an optical illusion. One of those connectors is male, the other is female. I'm not with the tractor now to take a measurement, but I'd bet the OD of the male connector to be 3/4".

Andy

40Kchicks · Nov 23, 2003

Hey Andy
Those flat face connectors work really good. However when I was building a hydraulic auger for my SSL I had to pay almost $50 bucks each for them. I was shocked.

Nice pictures
Eric

MadReferee · Nov 24, 2003

Thanks.

BTW, in hydraulics, always measure the ID (inside diameter) of the hose. The outside diameters will vary greatly due to number of wires surrounding the hose and pressure rating.

Those QD's are probably 3/8 even though you would think they are bigger. I have a couple of them on some of my stuff and they are similar in size. A 3/4 inch QD would probably have a female end ID at about 2 inches which is huge. The 3/8 are about 7/8 inches ID and are pretty much standard for ag equipment.