7308 hydraulic connections

[mandor]

When removing and re-installing my FEL, I find that I have a hard time with the pressure building up in the unhooked lines. I first noticed this when I removed the FEL and did not release all pressure before unhooking the lines. Yesterday I hooked it up after being off about a month and the lines had pressure again. Any suggestions to the correct and proper way to get these lines without pressure. Thanks in advance for any help.

 

[hazmat]

<font color="blue"> Yesterday I hooked it up after being off about a month and the lines had pressure again. Any suggestions to the correct and proper way to get these lines without pressure. </font>

Are all the lines building pressure? If yes see below.

Did you leave it out in the sun? When the oil gets hot, it expands slightly causing pressure buildup. I've had it happen when I took it off in the AM & tried to put it back on in the PM.

If one line out of each pair (curl vs. lift) is building pressure - maybe you aren't parking it on a firm level spot???

 

[J_J]

I would suggest un plugging after all power is shut off and the pressure has bleed down. I also plug the loose ends together. Less chance of dirt infiltration.

 

[jinman]

</font><font color="blue" class="small">( I also plug the loose ends together. )</font>

Most likely all the loose connections are male so they will not go together. Thats the way they are on my 16LA. If you purchase female quick-connects to put on the ends, your suggestion would work very well. If the oil heats up and expands, it will run out the connection. I just may give it a try.

This last weekend I had my loader quick-connects locked so tight that I had to loosen connections on my loader to relieve the pressure. My loader had been sitting in the sun for over a week and there was so much pressure I couldn't get the quick-connects to release even after tapping them with a hammer.

 

[DavidJ]

I have the same problem when I take them off cool and it try to reinstall them in the heat of the day. You have a few options.

1) Always let them cool to at least the temp it was when you removed them before trying to reinstall them.

2) Only take them loose in an environmentally controlled building. /forums/images/graemlins/grin.gif

3) Always take them off in the hottest part of the day and put them back in the coolest. /forums/images/graemlins/smile.gif

4) Wrap the fitting with a cloth (very very important) and tap the nipple with a hammer or against the loader frame to relieve the pressure.

5) install female fittings with bleed valves each time you take them off the tractor. /forums/images/graemlins/grin.gif


Number 4 is how I do it. Be sure to wrap a cloth around them (don't ask why I'm so adamant about this /forums/images/graemlins/blush.gif) before you tap on it.

 

[caddison]

I had the same problem with mine as well and now I have the same problem with the L114 on my DX33. I am thinking there should be a handy little tool out there in similar fashion to a C-clamp with and end like a pickle fork to catch the back side of the fitting with the screw end having a small cup type end to keep the fluid from getting all over everything.....I think heat and cold are the culprits most of the time....better get to work on that tool!

 

[J_J]

You might also activate the valve for that circuit.

 

[PineRidge]

If you are like me and have a FEL or even a BH then you know that even though you may equalize the pressure in the hydraulic circuit before you disconnect them, the sun beating down on the parked cylinders can raise the internal hydraulic pressure enough to make reconnection practically impossible. So you probably do just like I have done so many times in the past and wrap a rag around the male quick connect and sharply rap it with a heavy object to relieve the pressure. I was content with doing the very same until I thought of a better way. They say that necessity is the mother of invention. So I went to my pole barn and dug out a copper 1 inch cap and a short length of 1 inch copper pipe. I soldered the cap on the pipe and trimmed it up so that the overall length was no more than 1-1/2 inches. Then I took a piece of emery cloth and deburred the inside of the copper pipe so that it had no sharp edge on the inside to cut my hoses.

Now I simply place the copper cap over the end of the male quick connect and tap it with the palm of my hand, no heavy tool needed since there is more surface area there for your palm to hit. The oil will travel toward the open end of the cap and away from you and your face. You can make this gadget smaller or larger to fit the size of the quick connects used on your machine and it is small enough to be easily carried in your pocket or tool box. See the attachment, make one for yourself, and keep the hammer in the shed! /forums/images/graemlins/cool.gif

 

[jinman]

</font><font color="blue" class="small">( Now I simply place the copper cap over the end of the male quick connect and tap it with the palm of my hand, no heavy tool needed since there is more surface area there for your palm to hit. The oil will travel toward the open end of the cap and away from you and your face. You can make this gadget )</font>

I wondered how long it was going to take you to show your solution. /forums/images/graemlins/laugh.gif I started to mention it in this thread, but I was sure you would read it and put the link to your nifty invention.

Good job, PineRidge!

Now for the brutal truth of the Texas sun. I had such a hydraulic lock on my hoses that I braded the end of the male connector and it still didn't relieve the pressure. I've never seen anything so tight, but the pressure was so high my hoses actually straightened themselves out. I HAD to loosen a connection and oil really spewed out when the connection loosened. /forums/images/graemlins/shocked.gif For me, I think the female quick connects will work best. It only takes two since you only have to have one hose pressure relieved on each cylinder. I would never have believed such a high pressure lock if I hadn't seen it with my own eyes. /forums/images/graemlins/crazy.gif

 

[PineRidge]

Jim when that kind of a condition exists why not hit your cylinders first with cold water from a garden hose. It's sure to rapidly drop the internal pressures for you I would think.