hydraulic disconnect and reconnect

Larry Edmonds · Feb 26, 2009

I've got a 1987 Case/IH 35HP diesel 385 utility tractor with a DuAl loader. I want to disconnect the loader and leave it "parked" while pulling the brush mower. The two hydraulic lines between the tractor hydraulic system and the loader controller have a male quick connect on one and a female quick connect on the other. Should I connect these two lines together, while the loader is disconnected; or, should I leave the lines separated and the ends covered for protection from dust? Probably a "stupid question"; but a serious answer would be greatly appreciated. THANKS!

RayP(MI) · Feb 26, 2009

Either way, keep them as clean as you can between uses!

Uncle Ernie · Feb 26, 2009

Seems like a good way to keep the ends clean. As long as both sides of the system are relaxed pressure wise I do not see what it would hurt. Never have tried it though...

Uncle Ernie · Feb 26, 2009

Just had another thought on this. Make sure the loader clyinders do not need to be hydrauliclly locked to stay in place parked. Plugging the lines together may make an open loop. Hate to see it tip over or fall down.

Anonymous-0 · Feb 26, 2009

Shouldn't be a major problem, unless as others have said, the opening of the loop doesn't knock it off the stand. You will neutralize the pressure in both sides of the system, but if you disconnect on a cold cloudy day, and reconnect on a hot, sunny day, the pressure of oil in the system can lock the fittings together. Then you just need a couple of wrenches to crack the lines to relieve the pressure.

Don-Wi · Feb 26, 2009

As long as the cylinders don't have any pressure on them, go for it. It's a good way to keep both ends clean.

Donovan from Wisconsin

Larry Edmonds · Feb 26, 2009

OK ... THANKS for the replies. SO, it presumably is OK to leave the two lines "loose" and not connected to each other, and OK to connect them together. Of course the male quick connect has the requisite ball check. I was concerned that the tractor hydraulic system may "need" the lines connected to allow for proper circulation of fluid. Thanks, Uncle Ernie and RayP(MI), for your advice.

Anonymous-0 · Feb 26, 2009

I would check to be sure that the tractor side has a relief valve in the path with the lines disconnected. If it is allowed to deadhead the pump, with no relief, the pump may be ruined.

Larry Edmonds · Feb 26, 2009

I guess that is the kind of problem I am concerned about. I don't know if the tractor has such a relief. SO, it sounds like I need to connect the two lines ... to give the fluid a circuit to flow through, just in case there is no relief. QUESTION: If there is a relief valve, will it hurt to connect the two lines? THANKS for the advice !

Elroy Noreen · Feb 26, 2009

I have a 9n with a front mounted pump for my loader and one of my hoses got disconnected and i did not see it laying on my frame loose and when i hit the starter i blew the pump up accidently so i had to buy a new pump and got rid of the disconnects on my hoses.

showcrop · Feb 26, 2009

one of my tractors has a valve near the loader outlet that has to be turned when mounting and dismounting to keep the press. relief from operating. you may want to check your owner's manual

Larry Edmonds · Feb 26, 2009

I haven't seen that kind of info in the owner's manual. I will do a closer read, though. I will also pull out the service manual. I see now that there are variations regarding tractor hydraulics. I surely appreciate all the advice I've gotten. THANKS MUCH!

Don-Wi · Feb 26, 2009

Originally thought you were talking about the loader itself- Not the live circuit. I think lots of the other guys thought the same.

Now that I'm understanding what you're asking, I'd definately plug them together if it's an open center system. If it's a closed center, then you don't want to plug them together because with a closed center system the oil does not flow freely while not in use. Conecting them would allow it to free flow and could heat up the oil, or possibly take away hydraulics from other systems.

With an open center system, then you would plug them together because the oil must flow, otherwise you will constantly be dumping the releif valve if there is one, and heating up the oil, if not damaging the pump.

Donovan from Wisconsin

tg in VA · Feb 26, 2009

Why not just take the bucket off? That's what I do.

buickddeere · Feb 26, 2009

Not a stupid question and compacts the soil less and burns less fuel than hauling an unused loader around.
As previously stated, closed center leave disconnected. Closed center they must be connected to provide flow to other hydraulic circuits.

Larry Edmonds · Feb 27, 2009

WOW! I had no idea what I was getting into ... relief valves and open/closed systems. I will make sure I have a good understanding of just what kind of hydraulic system the tractor has before I proceed. I want to remove the loader to make it easier to get to the Master Brake Cylinders and related hydraulics ... removing the hood and other "in the way" stuff. Again, THANKS FOR THE ADVICE!...the saga continues...

Dieselrider · Feb 27, 2009

I think you will find that the loader is not as easy and convenient to take off and put back on as you might think.

hydraulic disconnect and reconnect

Larry Edmonds

New User

RayP(MI)

Well-known Member

Uncle Ernie

Member

Uncle Ernie

Member

Anonymous-0

Well-known Member

Don-Wi

Well-known Member

Larry Edmonds

New User

Anonymous-0

Well-known Member

Larry Edmonds

New User

Elroy Noreen

New User

showcrop

Well-known Member

Larry Edmonds

New User

Don-Wi

Well-known Member

tg in VA

Member

buickddeere

Member

Larry Edmonds

New User

Dieselrider

Member

Similar threads