Tired of dripping quick disconnects...

[Dougster]

Hmm.. non of my ford or JD female QD's drip... I think yours need orings.. or need to be repalced if they leak that bad.
soundguy

First off, the leaks are not horrible, but they are a definite nuisance.

Second, if the o-rings were bad, wouldn't they leak when connected and pressurized? These leaks I'm talking about are occuring on two sets of hoses when completely disconnected from the tractor and sitting around unused.

Third, both the male and female couplings leak about the same amount... and I don't believe the males have o-rings... or am I wrong about that?

Dougster

 

[Soundguy]

If they leak that bad.. I'd deffinately replace them.. I like nice clean tight well fitting...fittings.

soundguy

 

[Wayne County Hose]

Doug,

What I'm saying with the pressure issue, is that I like to build in a safety factor. Your pressure relief valve kicks open at 2500 p.s.i. of nice steady even pressure and flow. However, in the real world, I'll bet you are seeing spikes well over 5 k.p.s.i. before that little check ball can come off the seat in your relief valve and port the excess pressure back to tank. Your pump may only put out 2500 p.s.i., but it's all the other components of your system which give you pressure spikes.

I've seen large excavators with 6 k.p.s.i. relief valves absolutely grenade cylinder housings out on the boom. And I mean split them length wise from end to end. Would 6 k.p.s.i. do this? No way. Probably more like 12 k plus! These spikes happen way faster than the pressure relief can compensate for. Or, more hydraulic flow than the pressure relief can pass before coming down to rated system pressure. This is what happens when you bounce your FEL, or anything else for that matter. This is exactly why hoses rated at 4 k.p.s.i. blow in a system rated for 2500 p.s.i.

But, that all aside, I think you have defective q.d.'s, no matter where they came from or what color they are. I can't see TSC not making good on them. My guess is that if you had this problem, many more before you have already returned these.

As far as leaking under no pressure goes, the higher the pressure, the harder the fluid pushes the ball on the seat. No hydraulic pressure means only spring pressure holding the ball on the seat. If you have a minor imperfection on the ball or seat, the spring can't apply enough pressure by itself to make a good seal.

If they are all pioneer brand couplings, but different color and design, they were probably from different batches. The o-rings have no effect on leakage when the q.d. is disconnected.

As far as people with Aggie style tractors switching over goes, I tell customers that they are better off with the higher quality flush face q.d. For an aggie style tractor, it's probably the last q.d. they will ever buy. My customers that are always pinching pennies keep buying the old style stuff and keep replacing it year after year. The guys that want it done once and done right buy the flush face and I rarely see them. Just remember, the cheap pay twice. I hope this helps you in your decision.

Good luck, Andy.

 

[Soundguy]

Hmm.. I'm not replacing my ag style QD's year after year... In fact.. I havn't repalced them at all..... I can't see this as being a design issue.. but rather a 'care' issue.

many people I know don't use dust caps on their male ends.. or over caps on the female ends.. nor do they take any care to clean them when connecting up.

When I pull my QD's. I wipre the line for about a foot with a clean rag and some wd-40, i then wipe down the male end with a wd-40-wet paper towell, , clean the cap, cap it, and slip it in a sandwhich baggie, and then rubber band it. I usually hose out the female end with wd-40, clean their cap, and then cap them. When i hook up.. out comes that can of wd-40 and a quick shot to the male end, and then a good shot to the female end. The ends on my mower are 9ys old now. The fem ends on my tractors are all oem and thus between 6 and 32 ys old.. ( except that my JD-B is not using hte oem set, but has a set plumbed tot he outside on hoses.. and they are also a few decades old. ).

I have replaced orings in the female ends before.. though not more than once per machine that I can recall..

And yes.. new sandwhich baggie after each use. At much less than a penny a piece.. it's good insurance.

Again.. care and mainteance are of prime concern...

Soundguy

 

[sandman2234]

Dougster,
Ask Wayne County Hose what he would charge to send you a set so you could try the better ones, and if they leak we would know it is your care, and not TSC's lower quality that is causing the problem. If they don't leak, then TSC gets the blame, and you get off scottfree, even if you decide to do the maintence as Soundguy suggests.
David from jax

 

[Soundguy]

I'm sure that a lack of meaint will only show up as drips after time has passed.. IE.. they won't leak asap.. only after use.. if it is a lack of care issue.

Soundguy

 

[Wayne County Hose]

Soundguy,

Your application and Dougsters is like comparing apples and oranges. Using them on a mower, they should last forever. In Dougster's application, he will wear out more than o-rings but wear out the metal also.

On a mower, fluid flows one way all day long with no real pressure spikes, maybe a mild surge if you hit some heavy grass. Big deal.

Dougster is using his equipment on a daily basis, on equipment that is sending hydraulic fluid in one direction, violently stopping it, then sending the fluid in the other direction. This is the absolute worst application for a q.d. Nothing wrong or abusive about it, just not very good for longevity. That is also the application for most q.d.'s around here.

What kills a q.d. is not use, or the amount of fluid passing thru it. What kills q.d.'s is fluid stoppage and direction change. Ever notice that when you energize a hose, it wants to straighten out? A q.d. does even worse. A q.d. is a serious restrictor of flow, fluid pushing one way tries to separate the two halves. Now when you stop the flow, the q.d.'s rest. Flow the other way now tries to separate them again. It's like wacking a baseball bat against a tree everytime you stop fluid flow or change direction. Something sooner or later is going to wear out.

You want to see even the best q.d.'s last under a month before leaking? Go to a stone quarry and look at a hydraulic hammer on an excavator. The guys call q.d.'s in this application part of their automatic lubrication system. Oil just drips down and lubes all the pivots.

 

[Dougster]

Dougster, Ask Wayne County Hose what he would charge to send you a set so you could try the better ones, and if they leak we would know it is your care, and not TSC's lower quality that is causing the problem. If they don't leak, then TSC gets the blame, and you get off scottfree, even if you decide to do the maintence as Soundguy suggests.
David from jax

Thanks David... but I'm not out to place blame... and my use and maintenance practices are about as good as they get in the real world of jobsite operation. Unused couplings are routinely checked, cleaned and are always left plugged or capped when not connected. The fact is that I have other couplings that I can try on these problem hoses... and if it turns out that the inexpensive Pioneer "matched set" couplings are to blame, I will simply return them and get something better.

Dougster

 

[Soundguy]

Not exactly.... different varieties of apples maybee.. but similar types.. perhaps red delicious and golden delicious??

My mower is pto driven.. The hyds on the mower are hyd cyls.. not motors.

as for heavy equipment and hyd qd's..? I think it still boils down to maintenance and care. I work at a general contractor.. have since 93.. I personally get to see ( and hear about ) all the repair bills that come in. QD's are not a area of concern on our equipment .. ( IE.. we probably replace lost keys and seats and windshields more often than QD's ). We have our fair sahre of different types of equipment from skid steers, to pulverizers, screeners.. various and sundry back hoe and track hoe.. etc. We have a couple full time mechanics, and 1 full time 'lube' man that keeps all the equipment serviced and cleaned after hours. ( incedentally.. that is where I picked up my 'baggie' idea for disconnected hyd lines.. etc.. )

I'm not saying you are wrong.. I'm saying that the better you take care of a piece of equipment.. the longer it lasts... The owner of the company asks each employee to use the equipment is if the employee owned it.. not as if it was rented.. etc...

Soundguy

Soundguy,

Your application and Dougsters is like comparing apples and oranges. Using them on a mower, they should last forever. In Dougster's application, he will wear out more than o-rings but wear out the metal also.

On a mower, fluid flows one way all day long with no real pressure spikes, maybe a mild surge if you hit some heavy grass. Big deal.

Dougster is using his equipment on a daily basis, on equipment that is sending hydraulic fluid in one direction, violently stopping it, then sending the fluid in the other direction. This is the absolute worst application for a q.d. Nothing wrong or abusive about it, just not very good for longevity. That is also the application for most q.d.'s around here.

What kills a q.d. is not use, or the amount of fluid passing thru it. What kills q.d.'s is fluid stoppage and direction change. Ever notice that when you energize a hose, it wants to straighten out? A q.d. does even worse. A q.d. is a serious restrictor of flow, fluid pushing one way tries to separate the two halves. Now when you stop the flow, the q.d.'s rest. Flow the other way now tries to separate them again. It's like wacking a baseball bat against a tree everytime you stop fluid flow or change direction. Something sooner or later is going to wear out.

You want to see even the best q.d.'s last under a month before leaking? Go to a stone quarry and look at a hydraulic hammer on an excavator. The guys call q.d.'s in this application part of their automatic lubrication system. Oil just drips down and lubes all the pivots.

 

[JSharp]

I've been looking at couplers and fittings a lot lately since I have to add a remote circuit to my old IH 404. I'm certain I read somewhere the gold Pioneer couplers are higher quality items than the silver variety. My guess is TSC kept the price the same but is now selling the cheaper coupler.

Changing them out to a non Ag style coupling sounds like bad advice. You'll end up using adapters all the time since 99.9999% of the Ag equipment in this area anyway uses the Ag style couplers. Unless you plan on also changing out all of your equipment, then never plan to borrow or rent anything else, you'll be using adapters constantly.

You'll be right back to the bad old days when every color tractor had a different type of coupler and you needed a box full of adapters...