not been picky but I have question
The hydraulic breakaway couplings appear to be back to front if the draw bar pin fell out it looks like there is no way for the hoses to let go or maybe they are different types of fittings than what Im used to

just wondering

a very neat job there of the pump install

Paul

Paul, I dont think it makes a difference as I understand it is just the pull on the connection.

I have never had this happen so I really have no experience. However, both my cats that have hydraulics are wired so that the hoses get get hooked up correctly, ie: one each way.

Just for us ole farm boys, a PTO has a specific meaning. What we are discussing on this thread is not really a PTO as we know it but a power output.

In order to get a PTO out of a CAT takes an adapter specific for that purpose.


From Wiki

Technical standardization

Agricultural PTOs are standardized in dimensions and speed. The ISO standard for PTOs is ISO 500, which as of the 2004 edition was split into three parts:

ISO 500-1 General specifications, safety requirements, dimensions for master shield and clearance zone
ISO 500-2 Narrow-track tractors, dimensions for master shield and clearance zone
ISO 500-3 Main PTO dimensions and spline dimensions, location of PTO.

The original type calls for operation at 540 revolutions per minute (RPM). A shaft that rotates at 540 rpm has 6 splines on it, and a diameter of 1⅜". Two newer types, supporting higher power applications, operate at 1000 RPM and differ in shaft size. The larger shaft has 20 splines (1¾" diameter), while the smaller has 21 (1⅜" diameter). All three types rotate counterclockwise when viewed from the tractor (When standing behind the tractor, the shaft turns clockwise). A 10 spline type was used with some early equipment such as the 1948 Land Rover, a six spline adapter was usually supplied. It is customary for agricultural machines manufacturers to provide the nominal PTO power specification, an indication of the available instantaneous power at the shaft.

The first industry standard for PTO design was adopted by ASAE (the American Society of Agricultural Engineers) in April 1927. The PTO rotational speed was specified as 536 ± 10 rpm; the direction was clockwise. The speed was later changed to 540 rpm.[7]

"mrsmackpaul" wrote:

not been picky but I have question
The hydraulic breakaway couplings appear to be back to front if the draw bar pin fell out it looks like there is no way for the hoses to let go or maybe they are different types of fittings than what Im used to

just wondering

a very neat job there of the pump install

Paul

You are right. Those couplings are threaded together, so if the drawbar pin did happen to come out I would pull the hoses apart. My drawbar hole is built up and the triangle pin retainer works properly. The couplings are stucci (spelling might be wrong) they have the best flow rate for -12 coupler. I tried the cheaper pull apart ones but they can't handle the hydraulic flow I was putting though them. I would cook the relief valve in a couple hours of steady use. Since I was changing the hyd. Setup anyway the control valve I used has a detent on one spool to return the ejector and close the apron so I don't have to hold the handle the whole time.

"cojhl2" wrote:

Paul, I dont think it makes a difference as I understand it is just the pull on the connection.

I have never had this happen so I really have no experience. However, both my cats that have hydraulics are wired so that the hoses get get hooked up correctly, ie: one each way.

With the break aways I have used and still use the knurled piece you pull or push with your hand when coupling or uncoupling has to be gripped otherwise they wont break away because there is nothing there too hold the knurled piece like your hand when uncoupling most have clamp that goes around those knurled pieces and that clamps to the tractor to work the breakaway

I have found when using the laser scoop because it corrects it self 5 - 10 times a second the couplings un hook them selves so I dont use the clamp but if I break something and the scoop parts way Im make one heck of a mess to everything

Paul

"mrsmackpaul" wrote:

With the break aways I have used and still use the knurled piece you pull or push with your hand when coupling or uncoupling has to be gripped otherwise they wont break away because there is nothing there too hold the knurled piece like your hand when uncoupling most have clamp that goes around those knurled pieces and that clamps to the tractor to work the breakaway

I have found when using the laser scoop because it corrects it self 5 - 10 times a second the couplings un hook them selves so I dont use the clamp but if I break something and the scoop parts way Im make one heck of a mess to everything

Paul

Aha, thanks Paul, that is the answer. But I still don't understand on second thought. The knurled piece has to be slide toward it's own base so how is it hooked up? I am not next to my tractors right now but will be in a couple of weeks and I've gotta look this over to understand.

Or wait, does that knurled knob slide both directions??

The couplings I use thread together.

For the sliding collar type couplers there is a holder that holds the sliding collar of the female coupler that mounts to the back of the cat/tractor. So when the hose gets caught or pulled, the male coupler pulls on the female one but because the collar is held it disconnects. That is the best that I can help explain it. It just sounds dirty

Bert

"657cat" wrote:

For the sliding collar type couplers there is a holder that holds the sliding collar of the female coupler that mounts to the back of the cat/tractor. So when the hose gets caught or pulled, the male coupler pulls on the female one but because the collar is held it disconnects. That is the best that I can help explain it. It just sounds dirty

Bert

Yep that sounds about right to me
cojhl2 that knurled piece slides both ways and is clamped to the tractor and goes in either one of these

the first type you clamp the knurled piece in in the holder



the second type you use a big cir clip in the grooves of the knurled piece



I have only ever had things come away when something has broken like a drawbar pin when we are digging into hard soil with the laser scoop and well it the pin can fail the tractor takes off might quick when it happens LOL

Paul

"cojhl2" wrote:

Just for us ole farm boys, a PTO has a specific meaning. What we are discussing on this thread is not really a PTO as we know it but a power output.

In order to get a PTO out of a CAT takes an adapter specific for that purpose.


From Wiki

Technical standardization

Agricultural PTOs are standardized in dimensions and speed. The ISO standard for PTOs is ISO 500, which as of the 2004 edition was split into three parts:

ISO 500-1 General specifications, safety requirements, dimensions for master shield and clearance zone
ISO 500-2 Narrow-track tractors, dimensions for master shield and clearance zone
ISO 500-3 Main PTO dimensions and spline dimensions, location of PTO.

The original type calls for operation at 540 revolutions per minute (RPM). A shaft that rotates at 540 rpm has 6 splines on it, and a diameter of 1⅜". Two newer types, supporting higher power applications, operate at 1000 RPM and differ in shaft size. The larger shaft has 20 splines (1¾" diameter), while the smaller has 21 (1⅜" diameter). All three types rotate counterclockwise when viewed from the tractor (When standing behind the tractor, the shaft turns clockwise). A 10 spline type was used with some early equipment such as the 1948 Land Rover, a six spline adapter was usually supplied. It is customary for agricultural machines manufacturers to provide the nominal PTO power specification, an indication of the available instantaneous power at the shaft.

The first industry standard for PTO design was adopted by ASAE (the American Society of Agricultural Engineers) in April 1927. The PTO rotational speed was specified as 536 ± 10 rpm; the direction was clockwise. The speed was later changed to 540 rpm.[7]

Of course it is a PTO, just not an ASAE standard PTO. ..any shaft where power is taken off is technically a PTO.