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LouSWPA 
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Joined: 11 Sep 2009
Location: Clinton, Pa
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 Topic: Hydraulic question
Posted: 01 Oct 2025 at 5:00pm |
I have a Royal King 37 hp tractor, with the backhoe attachment. If I don't bleed down the hydraulic system, tractor shut down, cycle all controls in tractor and hoe before I disconnect the hoe from the tractor, then I cannot get the quick disconnects reconnected when I setting up to use the hoe again. In that case, I then need to take cover off of controls and open the system to relieve the pressure. PITA! my question is there something I can put in line that I can relieve the pressure w/o taking it all apart?
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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DMiller
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Posted: 01 Oct 2025 at 5:33pm |
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Have same issue with a 2305 Deere loader attachment, anything functional would be ridiculously expensive.
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LouSWPA
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Posted: 01 Oct 2025 at 7:23pm |
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Dave, I'm sure you are right, but it sure would be nice to have a manual pressure relief that could be installed in line with the two hoses going to the hoe.
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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HudCo
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Location: Plymouth Utah
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Posted: 01 Oct 2025 at 7:29pm |
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pioneer 9500-4 series couplers connect under preasure
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LouSWPA
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Posted: 01 Oct 2025 at 9:13pm |
 HudCo wrote:
pioneer 9500-4 series couplers connect under preasure
Thanks Hud! Dave was right, not cheap!
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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steve(ill)
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Location: illinois
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Posted: 02 Oct 2025 at 3:16pm |
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could you put a 3000# valve with a couple 1/4 inch hoses between the supply and return lines as a JUMPER... open the valve and relieve the pressure back to suction side ?
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Like them all, but love the "B"s.
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LouSWPA
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Posted: 03 Oct 2025 at 9:45am |
steve(ill) wrote:
could you put a 3000# valve with a couple 1/4 inch hoses between the supply and return lines as a JUMPER... open the valve and relieve the pressure back to suction side ?
Steve, I don't think that would solve the problem completely. It would equalize the pressure between the supply and return on the hoe, but not necessarily between the hoe and the tractor. Most often it is only one line that is pressurized, but on a couple of occasions it is both. I know I am prone to 'forgetfulness', but I am pretty sure I am bleeding them at least most of time, yet, when it comes time to reconnect, I find one or both lines w/some pressure prohibiting me from making the connection. I suspect that as the hoe settles, the weight of the hoe on one or more of the cylinders is causing the issue. I need to discover a way to support the hoe better, I think. I was hoping for a relatively inexpensive solution of an inline pressure relief, but what I have seen so far is beyond my budget. |
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Tbone95
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Location: Michigan
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Posted: 03 Oct 2025 at 11:03am |
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Hmm, so cheap and dirty? Heavy on the dirty? Not much is cheap these days. How about just before the hose tip, put in a tee and a little ball valve on the branch of the tee. Carry a coffee can with you when you hook up and crack the valve into the coffee can. If you can keep it clean dump it into your oil supply. If not pour it on moving parts. Not elegant but beats slamming the hose tip onto the drawbar and spraying oil everywhere.
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LouSWPA
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Posted: 03 Oct 2025 at 2:26pm |
Tbone95 wrote:
Hmm, so cheap and dirty? Heavy on the dirty? Not much is cheap these days. How about just before the hose tip, put in a tee and a little ball valve on the branch of the tee. Carry a coffee can with you when you hook up and crack the valve into the coffee can. If you can keep it clean dump it into your oil supply. If not pour it on moving parts. Not elegant but beats slamming the hose tip onto the drawbar and spraying oil everywhere. I tried the slamming trick, but not enough man in me to get it to work!3000 psi system |
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Les Kerf
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Location: Idaho
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Posted: 03 Oct 2025 at 3:24pm |
A quick google search came up with this:
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DiyDave
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Posted: 03 Oct 2025 at 4:00pm |
Where are you storing the backhoe? If it gets full sun, the fluid can heat up and lock the fittings up, don't ask me how I know... 
Come back in the early AM or on a cloudy day, and sometimes the locked fittings work like a charm...
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Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need!
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Coke-in-MN
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Posted: 03 Oct 2025 at 6:34pm |
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Have that problem on Skid Loader and Snow Plow Shut off engine , cycle the valves , make connection , restart engine
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Tbone95
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Posted: 03 Oct 2025 at 7:05pm |
Coke-in-MN wrote:
Have that problem on Skid Loader and Snow Plow Shut off engine , cycle the valves , make connection , restart engine |
But it’s on the hoe side? When disconnected?
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Tbone95
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Posted: 03 Oct 2025 at 7:07pm |
LouSWPA wrote:
Tbone95 wrote:
Hmm, so cheap and dirty? Heavy on the dirty? Not much is cheap these days. How about just before the hose tip, put in a tee and a little ball valve on the branch of the tee. Carry a coffee can with you when you hook up and crack the valve into the coffee can. If you can keep it clean dump it into your oil supply. If not pour it on moving parts. Not elegant but beats slamming the hose tip onto the drawbar and spraying oil everywhere.I tried the slamming trick, but not enough man in me to get it to work!3000 psi system |
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Bah! Don’t hit it with your purse, act like you mean it!!!🤣. So anyway, what about the tee and dump valve thing? Still too expensive?
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LouSWPA
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Location: Clinton, Pa
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Posted: 03 Oct 2025 at 8:00pm |
Les Kerf wrote:
A quick google search came up with this:
AH Ha! now we are cooking! thank you sir |
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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LouSWPA
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Joined: 11 Sep 2009
Location: Clinton, Pa
Points: 25298
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Posted: 03 Oct 2025 at 8:06pm |
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Les Kerf
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Joined: 08 May 2020
Location: Idaho
Points: 1356
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Posted: 03 Oct 2025 at 8:37pm |
LouSWPA wrote:
Les Kerf wrote:
A quick google search came up with this:
AH Ha! now we are cooking! thank you sir |
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You are most welcome  I remembered reading about those in the Farm Show Magazine some years ago; I have never actually touched one myself.
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DMiller
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Posted: 04 Oct 2025 at 6:38am |
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Caution on adding a cross connection. What I see most times on simpler hydraulic systems is No Pilot control from one function to another. IE Boom Up or Boom down, or as with outriggers leg extend or retract. Placing a cross connect without concern can lead to a system immediate drain off and the machine settling in a less than optimal configuration, or the potential to fall onto the person connecting hoses.
On heavier or more complex systems they do have pilot valve blocks to block flow from one function to another to ‘Lock’ the major components in position. Simpler systems there is no pilot block set ups to cancel that.
My lawn mower has a loader attachment, no pilot system where will settle and hydraulically end up with system pressure on a cylinder side. Makes a mess every time I connect it back up but is expected.
Edited by DMiller - 04 Oct 2025 at 6:38am
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LouSWPA
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Posted: 04 Oct 2025 at 6:50am |
DiyDave wrote:
Where are you storing the backhoe? If it gets full sun, the fluid can heat up and lock the fittings up, don't ask me how I know...
Come back in the early AM or on a cloudy day, and sometimes the locked fittings work like a charm...
Dave it lives outside, so your point is well taken. |
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Tbone95
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Joined: 31 Aug 2012
Location: Michigan
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Posted: 04 Oct 2025 at 7:23am |
LouSWPA wrote:
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LouSWPA
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Posted: 04 Oct 2025 at 2:19pm |
Tbone95 wrote:
LouSWPA wrote:
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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DaveKamp
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Location: LeClaire, Ia
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Posted: 05 Oct 2025 at 8:41am |
My backhoe attachment is self-contained, driven off PTO pump, so I don't have the disconnect problem there, but the FEL on my uncle's tractor DID, and HE had to fight with it same way (sat in the sun, and as Dave said... don't ask how I know...)
Shutting down the engine on the tractor, then wiggling the valves to equalize relieved the tractor side. Wiggling the valves on the loader side (valves are on the loader side) cleared the bottled pressure on the loader side.
In the beginning, God gave us Plumbing, and contrary to what you MAY HAVE BEEN TOLD, PLUMBING was the ROOT OF ALL EVIL. Pipes were always in the way, subject to damage, and constantly leaking. Quick disconnects were a really great invention to add to implements... a great idea, but on the other hand, a bad idea... as they allowed great places for fluid to leak out, and even worse, dirt to get in. From this came a plethora of covers, caps, shields, plugs in all sorts of materials and colors... then covers, caps, shields and plugs added into the coupling to break off, fail, get stuck, snagged in hoses and PTO shields, then ripped off and lost. Then came fancy connectors WITH shielding and seals integrated in, again, causing a further schism between mating flavors, and implement manufacturers and equipment manufacturers all picked different favorites, making previously compatible stuff now at-odds. As companies developed different kinds of QD connectors, there became a great diaspora of incompatible mismatch, wailing, and grinding of teeth...
SO... it was another classic case of a good idea, but a bad idea.
The unfortunate reality of hydraulics, is that it doesn't take much heat for fluid to expand a little, and worse yet, if there' aeration in the fluid (air bubbles) they'll expand too, resulting in residual pressure in the lines. Having a crossover valve to equalize CAN help, but sometimes it still doesn't... and frequently, it's too much for a clutch or a purse, and if your fanny pack is sideways on your hip, it obstructs the sidearm-sway of the swing, so a medium tote, preferably full of scented candles, rather than three bottles of wine, will work better at slamming those couplers in... but if not, the scented candles will survive still useable, the wine bottles will probably be broken, leaving a stained slurry of broken glass and swill... so bring a straw and a sock to suck it out afterwards, and don't mix your wine flavors- that's a heathen act of unthinkable barbarism that will strip you of your high-heels and little black dress for at LEAST a year.
By the way, be very careful when sucking up the mess, because many hydraulic fluids look very much similar to Cabernet Sauvigion... but it sure-as-heck don't TASTE like it... it'll leave you with the same headache, but it WON'T make the sex any better...
Edited by DaveKamp - 05 Oct 2025 at 8:46am
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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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