Styles of quick disconnect hydraulic connectors

adlertom · Oct 25, 2004

I have a New Holland TC33DA with one remote hydraulic valve and a pair of quick disconnect connectors. The connectors are both female, and consist of a spring loaded outer ring that is pulled back to accept a corresponding male connector.

I've noticed however that most rental skid steer hydraulic attachments use a different style of connector. First, the attachments have a male and female connector. Second, the connectors themselves have a flat face with a concentric spring loaded ring.

I'd like to be able to use certain skid steer type attachment with my tractor, such as a post hole digger. I have a quick attach FEL, so I could remove my bucket and attach other attachments. My questions are:

1. What are the proper names for these hydraulic connectors?

2. Why are the rental attachment connectors "polarized" with one male and one female connector, but my tractor connections are not?

3. Can I simply change or adapt my tractor connectors so that they will work with the skid steer style connectors?

Thanks for any info or advice.

Tom

markct · Oct 25, 2004

well first off skidsteer attachments usualy take alot of hydraulic flow or GPM, thats the resaon for the different style tips, the pioneer style on a tractor has alot of resistance when used for alot of GPM since the fluid has no direct path so to speak, but the flat style connectors on skidsteers are made to take alot more flow, now there is more to it than adapting the hoses to fit, first make sure your tractors internal hydraulics have enough GPM to operate the attachment, alot of skidsteers have flows of 40 GPM or sometimes even more, very few compact tractors have this kinda capacity, i know even my 105 hp ford 8000 only has around 15 gpm at the remotes, so check into it before you rent any skidsteer attachments

BarryinMN · Oct 25, 2004

1. Name is quick disconnects likely Pioneer ISO. they will pull apart before hose rips. - example - detach implement from tractor & drive away but forget hoses... they pop apart without high PSI spray or destroying tractor hydraulic pump.
2. Polarized so the function lever/pedal activates motion same direction everytime - safety item.
3. Adapters can be found at your dealers or www. speedco.com

dliston · Oct 26, 2004

Keep on thing in mind if you decide to adapt your tractor to accept rental attachments. When you hook up, you then are pumping all the accumulated junk that may be in residence in the rental's hydraulic system through your baby. Who knows how old the fluid is, who's system it was last on and how well they maintain their equipment.

I'd have reservations about accidently inheriting someone else's hydraulic shortcomings...

Doug /forums/images/graemlins/frown.gif

markct · Oct 26, 2004

i know at a construction company i worked for that whenever they got a used attachment or rental attachment they would hook up the in line and leave the out line off to flush old fluid out and into a bucket then once they had pushed about the capacity of the attachment thru it they then would reconect it and top of the machines hyd oil resivoir

adlertom · Oct 26, 2004

Thanks to everyone for the tips and info.

I had read elsewhere that skid steers have more hydraulic flow than tractors. So I might not be able to effectively use every kind of skid steer attachment, or perhaps only be able to run them at lowers speed. For some lower GPM attachments I should be OK, I'm hoping.

I purchased a male and female connector set from my dealer this morning. $70 bucks for the pair /forums/images/graemlins/shocked.gif They are Parker brand with part numbers of FEM-501-8FP and FEM-502-8FP stamped on them.

The dealer told me that most newer attachments use this style of connector. They are a flat front connector, designed for low drippage/leakage when disconnecting. He also said that the manufacturers went to this type of connector to comply with EPA regulations and minimize hydraulic fluid being released into the environment.

Interesting that New Holland doesn't put these low leakage connectors on their tractors. The EPA rules for tractors must be different?

Good suggestion about running the questionable fluid out of the attachment prior to hooking up to your own system!

markct · Oct 26, 2004

( The dealer told me that most newer attachments use this style of connector. They are a flat front connector, designed for low drippage/leakage when disconnecting. He also said that the manufacturers went to this type of connector to comply with EPA regulations and minimize hydraulic fluid being released into the environment )

thats a bunch of crap, the tractor type (pioneer style) dont leak when disconnected either, unless defective of course, both styles have been around for a long time, they are just for different applications, one is high flow one isnt

adlertom · Oct 26, 2004

( ( The dealer told me that most newer attachments use this style of connector. They are a flat front connector, designed for low drippage/leakage when disconnecting. He also said that the manufacturers went to this type of connector to comply with EPA regulations and minimize hydraulic fluid being released into the environment )

thats a bunch of crap, the tractor type (pioneer style) dont leak when disconnected either, unless defective of course, both styles have been around for a long time, they are just for different applications, one is high flow one isnt )

I'm sure you're correct that the flow capacity is different. However, looking at the Parker web site, they list their poppet style connectors as "general purpose", and their flush face connectors as "non-spill". So, at least they are marketing them as having a difference in terms of the amount of fluid "spillage"

texbaylea · Oct 27, 2004

marlct

I dunno.. My pioneer type QDs all leak about a milliliter evry time I disconnect them and they are new. Their design with a ball poppet insures that there is a small void space between the halves.

Vernon

markct · Oct 27, 2004

i see what your saying now, i was thinking of leakage once they were disconected, i can see how there is a little oil in between the two balls in there, not enough to matter i would think but who knows