need advice on pressure line

[chaser]

After getting advice on how to interrupt 3ph pressure line for adding QD's so i could run a backhoe from my L4330, I started on it today. As one can see there is a high pressure line (from distribution block to top of transmission) that seems easy enough to disconnect and splice in QD's. I could then disconnect the line (using QD's) and hook it to the backhoe for pressure. Sounds simple enough. In fact, there are two indentical lines both on the left of the tranny and one on the r/s of tranny. Are they both high pressure? Both of them go directly from the valve assembly to the bottom ends of the lift cylinders for the 3ph. Or is one of them a return line. If they are both high pressure then where is the return line from the cylinders. Certaintly it can't be those two whimpy little hoses that connect from the two cylinders to the top of the valve assembly. I would think they would just be vent lines of some kind. Pretty much got a handle on where to splice in to the HPL (after the valve assembly and not before) but am needing help for return line from BH to trans case. Im new to this but once I get it figured out (with your help of course) will be a happy camper and post follow up photos for those willing to do the same procedure.

 

[J_J]

On the back of the hyd block, there is a banjo fitting and return hyd tube #170going to the side of the tractor.

You can tee in there.

On the top back, there is a hyd tube #140 in the parts manual that you could tee into. That is the return for the aux valve.

Can you not just plug into the remote QD's on the back. Just bungee the valve in the correct position.

Your pressure line is #10 from the hyd blk going to the top side front under the seat. The fittings are banjo fittings.

You could cut line #10 and add a female QD for the BH and and use compression fittings. You will lose 3pt.

If your BH has three lines, you can do something else.

Some people run the BH return hose to the filler cap.

 

[chaser]

Thank you for the response JJ. I have no remotes on my tractor and woods bh90x will come with a two hose kit. I labeled what I believe is the high pressure line from Hyd pump to the banjo bolt on the distrubition block. I marked it HP. I marked the return line (from fel) on distribution blk with letter "R" and then another "R" where it goes into side of trans. I then marked the HP line as it runs from the distribution blk all the way back and up to top of trans: I put "Tee ?" on it. It would seem like this is the best place to tap into or maybe further down below the floor where there is plenty of straight run to work with. I thought initially I should take the 3ph hose off where it exits the valve body assembly close to the banjo bolt marked "Tee ?" (on top of trans) put a longer hose on that that reaches rear of tractor with a female QD on it, and put a male QD on the hose leaving the bottom of the 3ph lift cyclinder and just reconnect the line for 3ph use. When I get the BH next month, or so, I would just disconnect them and connect to the BH. As for the return line, I think the ease of just placing the return hose from BH to filler plug is a great idea but don't understand how foreign matter woud not enter in. As for a shop manual I don't have one but am seriously considering the $100.00 purchase. On one last note, I don't see how tapping into a line prior to where it enters into the valve assembly on top of the trans will provide any pressure release, that is why I was going to do it where the rear lift cylinder hose attatches to the valve, near the banjo bolt, on top of the trans. Sorry for the lengthy inquiry, any help is always appreciated........

 

[J_J]

Sorry, but you can not tee into a pressure line.

You can tee the return line.

All valves have to be in series with the pump flow.

You will have to cut and use compression fittings. to use the pressure line for input to the BH.

In you last picture, there is a plate with two bolts. Remove the two bolts and see if there are two large holes with threads. There could be an adapter that will fit with IN and OUT ports.

I think I would cut the line in the vertical line and face a QD to the back, and put the opposite QD on the other cut line going to the 3pt.

Then make up a jumper to connect those QD's when the BH is removed.

 

[Leejohn]

In the last picture you have hyd pressure under the 2 bolts that are holding a plate on, right above the line with the banjo fitting. You can made a new plate and put threads in the new plate, there is no threads under the plate. Take it off and look at the under side, it's where the rear remotes hook up. The 2 hoses that go back on each side is for your 3 pt and are SA cyl's.

 

[J_J]

There is probably a factory made threaded plate for the ports.

You will have to figure which one is the pressure port. Just crank the engine over for a few seconds,and yu will see the pressure port..

There maybe three ports, a pressure port, a PB port, and a return port.

You could probably make a plate with threaded holes for the ports. A pressure port, and one of the other ports feeds the 3pt, and the third hole is a return port.

The manual should indicate which.

 

[Farmerford]

Chaser: In the third picture, aren't the hoses on the reverse side of the plate the pressure line to, the power beyond line from, and the tank line from your FEL? If so, then your two hose backhoe can be connected in one of two ways: 1. PWB line from FEL to IN or P line on BH valve and T or OUT line from BH valve to the port in the plate where the PWB line from the FEL was connected; 2. PWB line from FEL to IN or P line on BH valve , T or OUT line from BH valve teed into same port on the plate as the T or OUT line from the BH valve.

#2 is preferable because it lets the OUT flow from the BH valve go directly to tank. #1 directs the BH OUT flow through the TPH valve, so the TPH valve must be kept in the DOWN position at all times to keep the flow path open.

 

[chaser]

There is probably a factory made threaded plate for the ports.

You will have to figure which one is the pressure port. Just crank the engine over for a few seconds,and yu will see the pressure port..

There maybe three ports, a pressure port, a PB port, and a return port.

You could probably make a plate with threaded holes for the ports. A pressure port, and one of the other ports feeds the 3pt, and the third hole is a return port.

The manual should indicate which.

Yes, the pressure feed is the lower hole in the picture directly inline with the banjo bolt. The upper hole has a screen in it. There dosen't seem to be a third hole. I do like the idea of fabricating a plate ( or having a machine shop do it) as opposed to running a line from the loader valve.

 

[Leejohn]

Now you have a return line on the back side of the picture you just posted. It might be just a rubber plug.

 

[J_J]

Page 52 item #50 is the adapter assembly for the aux remotes.

Item # 140 is the return port for the aux remotes. Don't know what the backside if it looks like but it does face/connect to the stacked spool valves.

Even if you bore some holes, it looks like you will still have a crossover.