My BX23MLB recently developed a slow seep at the Snap-Tite Series 72 Quick Disconnects on the LA210-1 Loader control valve to the 1/4" hydraulic hoses from the tractor.
Noticed a wet spot in my driveway where I left the BX parked overnight. Closer look noted the QDs at the loader control were wet with oil running down the tractor frame.
Sprayed off oil, cleaned up, disconnected, checked inside QD, reconnected, ran tractor, parked it and rechecked a couple days later- oil seeping down loader control.
Pricing out replacement QDs was fairly pricey considering there were 4 at the Loader valve and 2 more at the Backhoe connection/bypass hoses. Best prices would run me about $120 for all six (July 2025). Ouch.
I was able to remove an O-ring and size it.
Turns out O-ring sizes to:
AS568-015 O-ring (aka #15), Nitrile Rubber, Buna-N (NBR), 70A Durometer (hardness).
ID = 9/16" (0.563) x OD = 11/16" (0.688) x CS = 1/16" (0.063)
These are nominal numbers with a range give or take a couple thousands. Temperature range -34F to 250F.
These can be gotten inexpensively at Grainger's or Amazon; Seen at Amazon for $10/100, Grainger for $4/100 (July 2025).
Looking inside the Snap-Tite QD you will see a white Teflon back-up seal with a rectangular cross-section (flat edges) and a black round cross-section O-ring in a groove. The Teflon ring is on top (closest to the QD opening), black O-ring is at far end that screws to hose.
With flash light carefully inspect the all the white Teflon seals for damage. If they are smashed, cut, or twisted, replacing the black O-ring may not fix the leak at the QD. From the info I've given for the black AS568 O-ring, you should be able to look up the correct Teflon back-up ring.
Mine were all good so I didn't look them up.
Sorry.
If somebody does have a number for the Teflon seals please add them in comments.
If you decide to order O-rings and replace them you will need a mini hook and pick set (pretty cheap at Harbor Freight).
Reach in with an angled hook and carefully pull out the O-ring. Getting the new O-ring in the groove is the hard part, requires good light and patience. I found that using the angled tool I could push in the new O-ring and get it past the groove and white Teflon seal, albeit a bit bunched up around the circumference. Then using the angled tool I could pull the Teflon seal up in the groove to give a gap in the groove below it, then pull that part of the black O-ring nearest the gap up, and slide it into the groove. Holding that section in the groove with the straight pick I worked around the groove with hook pulling up the rest of the O-ring into the groove, eventually getting the black O-ring completely seated in the groove with the white Teflon seal on top.
If you think you got it in completely, take a second look to verify. If the white Teflon seal is below the O-ring the QD will hook up, but hydraulic pressure will blow out the new O-ring.
Took me about 45 minutes to replace all six QD O-rings.
Saved $120.
No mas leaky leaky.
Noticed a wet spot in my driveway where I left the BX parked overnight. Closer look noted the QDs at the loader control were wet with oil running down the tractor frame.
Sprayed off oil, cleaned up, disconnected, checked inside QD, reconnected, ran tractor, parked it and rechecked a couple days later- oil seeping down loader control.
Pricing out replacement QDs was fairly pricey considering there were 4 at the Loader valve and 2 more at the Backhoe connection/bypass hoses. Best prices would run me about $120 for all six (July 2025). Ouch.
I was able to remove an O-ring and size it.
Turns out O-ring sizes to:
AS568-015 O-ring (aka #15), Nitrile Rubber, Buna-N (NBR), 70A Durometer (hardness).
ID = 9/16" (0.563) x OD = 11/16" (0.688) x CS = 1/16" (0.063)
These are nominal numbers with a range give or take a couple thousands. Temperature range -34F to 250F.
These can be gotten inexpensively at Grainger's or Amazon; Seen at Amazon for $10/100, Grainger for $4/100 (July 2025).
Looking inside the Snap-Tite QD you will see a white Teflon back-up seal with a rectangular cross-section (flat edges) and a black round cross-section O-ring in a groove. The Teflon ring is on top (closest to the QD opening), black O-ring is at far end that screws to hose.
With flash light carefully inspect the all the white Teflon seals for damage. If they are smashed, cut, or twisted, replacing the black O-ring may not fix the leak at the QD. From the info I've given for the black AS568 O-ring, you should be able to look up the correct Teflon back-up ring.
Mine were all good so I didn't look them up.
Sorry.
If somebody does have a number for the Teflon seals please add them in comments.
If you decide to order O-rings and replace them you will need a mini hook and pick set (pretty cheap at Harbor Freight).
Reach in with an angled hook and carefully pull out the O-ring. Getting the new O-ring in the groove is the hard part, requires good light and patience. I found that using the angled tool I could push in the new O-ring and get it past the groove and white Teflon seal, albeit a bit bunched up around the circumference. Then using the angled tool I could pull the Teflon seal up in the groove to give a gap in the groove below it, then pull that part of the black O-ring nearest the gap up, and slide it into the groove. Holding that section in the groove with the straight pick I worked around the groove with hook pulling up the rest of the O-ring into the groove, eventually getting the black O-ring completely seated in the groove with the white Teflon seal on top.
If you think you got it in completely, take a second look to verify. If the white Teflon seal is below the O-ring the QD will hook up, but hydraulic pressure will blow out the new O-ring.
Took me about 45 minutes to replace all six QD O-rings.
No mas leaky leaky.
