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Loader connection

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bmark
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2001-08-07          30732


I've only removed my New Holland 7308 loader once and had some trouble reconnecting the hydralic hoses. When I removed the loader, I used the rubber covers to protect the male and female hose connections. The issue is that when I tried to reconnect the hoses the hoses from the loader had too much pressure and I could not push the hoses far enough into the connection for the connection collar to lock. I had to loosen fittings on the loader to bleed off pressure to get the hoses to connect. Am I doing something wrong or is this a common problem?Thanks, Mark



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Roger L.
Join Date: Jun 1999
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2001-08-07          30760


It's a common problem for me as well. And I hope somebody has a better cure than I know of.....which is basically the same thing that you did. I've also tried to unseat the ball valve in the quick-disconnect enough to get rid of some fluid....unsuccessfully thus far. My suspicion is that sometimes the loader settles on its stand, allowing its own weight to push on a cylinder and creating pressure. Other times it may be a difference in temperature creating the pressure problem.
Maybe someone knows a trick that works better.
....


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Randy
Join Date: Feb 2002
Posts: 76 myLocation
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2001-08-08          30765


Maybe this will help, maybe not. For no apparent reason when I put my tractor away for the day I lower the loader turn of the engine and then operate the loader control which seems to release the pressure in the hydraulic lines. However, I have not disconnected any of the hydraulic lines to see if this is the case. My brother is a mechanic for the local NH dealer, next time I see him I'll ask if he has any suggestions. ....


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Art White
Join Date: Jan 2000
Posts: 6898 Waterville New York
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2001-08-08          30768


What Randy suggested is the best you can do. Several people before you as well as some of my customers have told me of the problem. ....


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TomG
Join Date: Feb 2002
Posts: 5406 Upper Ottawa Valley
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2001-08-08          30775


Somebody mentioned a different type of quick connect fittings that don't have this problem. I don't remember what they are called--just that they are expensive. Myself, I sometimes have to unseat the ball end, but only once have had to loosen a fitting, so it's a problem that I'm not looking to cure. On the other hand, if I had to swap implements much in all the current heat, I might become more interested in expensive fittings. Another trick that sometimes seems to help is to operate control valve while trying to seat the hose. My loader SCV female connector ends face up and oil pools in the bottoms. I think the oil can become trapped which makes seating the fittings difficult. Operating a control valve allows trapped oil to be forced into the SCV. ....


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Murf
Join Date: Dec 1999
Posts: 7249 Toronto Area, Ontario, Canada
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2001-08-08          30781


Or, for about $30 in parts and a little elbow grease, you can put a Tee in each line and a High Pressure Hydraulic Valve (just a high pressure on / off valve) between the two 'sides' of each circuit. Open and close each valve just prior to connecting hydraulic lines, AFTER the loader is secured to tractor, if you do not have any static pressure between the quick-disconnect fitting and the SCV (cycle the valve BEFORE starting tractor to accomplish this) the connections will be a breeze, with minimal oil spillage also. This method keeps all the pressurized oil in the system where it belongs and is the safest way to relieve the pressure, give it a try, you'll wonder how you ever did it before. Best of luck. ....


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charlie
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2001-08-08          30799


i have that loader on a 1530.when we take it offwe shutff the engine,release the pressure by working the control in all directions,and turn the screw on the valve block to the off position before disconnecting the hoses.the service manager at thwe dealership told me to do this when the loader was put the tractor.i've fought hoses for alot of years but this setup works. good luck ....


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