ISO 5675 Hydraulic fitting O-Rings?
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rademamj1
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The ISO 5675 hydraulics commonly called Pioneer connections, do come in 1/4" and 1/2" and 3/4" sizes. A majority of tractors typically use the 1/2" size, but SOME 25Hp and under do use 1/4" and many over 115Hp tractors use 3/4" connections.
So I would confirm your size of Pioneer Hydraulic connections and then check online at following hydraulic super store site:
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OP
FTG-05
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Mine are 1/2" They are on the FEL valve body for L4330.
Neither HD nor Discount Hydraulics show any o-rings for 5675 type connectors. I e-mailed DH and asked them, no beuno.
Neither HD nor Discount Hydraulics show any o-rings for 5675 type connectors. I e-mailed DH and asked them, no beuno.
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OP
FTG-05
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Found it: https://promo.parker.com/parkerimag...ownload/quick coupling/Pioneer-4000Series.pdf
4050 Series Replacement O-Rings
Body
Size Material Part Number Durometer
1/4 Nitrile 50001-113-0260 90
3/8 Nitrile 50001-116-0260 90
1/2 Nitrile 50001-211-0260 90
3/4 Nitrile 50001-215-0010 70
1 Nitrile 50001-218-0260 90
4050 Series Replacement O-Rings
Body
Size Material Part Number Durometer
1/4 Nitrile 50001-113-0260 90
3/8 Nitrile 50001-116-0260 90
1/2 Nitrile 50001-211-0260 90
3/4 Nitrile 50001-215-0010 70
1 Nitrile 50001-218-0260 90
OP
FTG-05
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And the tech specs, according to Grainger.com is: https://www.grainger.com/product/GR...HB7?searchQuery=50001-211-0260&searchBar=true
If the Grainger specs are true, then it's SAE standard AS568 dash #211. The McMaster part number is 9452K31. It's also part number 211 in this kit from Amazon: QLOUNI 826 Piece Universal O-Ring Kits Assortment SAE + Metric Rubber NBR O-Ring Gasket Set for Plumbing, Automotive and Faucet Repair + 4 Piece O-Ring and Seal Remover - - Amazon.com
MSC version: https://www.mscdirect.com/product/details/96986831
Note that the Grainger version is polyurethane, the amazon and McMaster versions are Buna-N and the MSC is Nitrile. Parker specifies Nitrile for this o-ring.
If the Grainger specs are true, then it's SAE standard AS568 dash #211. The McMaster part number is 9452K31. It's also part number 211 in this kit from Amazon: QLOUNI 826 Piece Universal O-Ring Kits Assortment SAE + Metric Rubber NBR O-Ring Gasket Set for Plumbing, Automotive and Faucet Repair + 4 Piece O-Ring and Seal Remover - - Amazon.com
MSC version: https://www.mscdirect.com/product/details/96986831
Note that the Grainger version is polyurethane, the amazon and McMaster versions are Buna-N and the MSC is Nitrile. Parker specifies Nitrile for this o-ring.
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thunderbirl
Member
At seven years old, my Yanmar SA424 recently developed a slow leak at the hydraulic connection for the FEL. No issue without hydraulics hooked up, but a slow drip when the couplers were connected.
I'll point out that the 1/4" variety of the 5675 coupling uses a "standard" o-ring number size 113 (embedded in the middle of the parker part number cited above!). I just got a pack of seven for $3 at Tractor Supply where you can find them listed on-line as "Double HH 9/16 in. x 3/4 in. O-Rings, 7-Pack". They have a 3/32" thickness which is standard for the size 113. Yes they are a 70 durometer hardness rather than 90, but other resources on the web say that's ok specifically for the fittings that are being discussed here.
I've only changed one out because it was the only one that was dripping (so far!). I may get to the other three on a rainy day.
Changing it out was a bit of a PITA - but a lot easier than sourcing and changing the whole fitting! There's little room room to work and the groove is a bit down the hole - almost around a corner. My o-ring hook tool didn't work at all, so I used a welding pick to pull it out. I was careful not to scratch the metal surfaces. I cleaned out the groove in the fitting with compressed air and a little nylon brush. I then lubed the new o-ring with hydro fluid and fiddled around for a couple minutes to get it in place.
Hope this helps someone!
I'll point out that the 1/4" variety of the 5675 coupling uses a "standard" o-ring number size 113 (embedded in the middle of the parker part number cited above!). I just got a pack of seven for $3 at Tractor Supply where you can find them listed on-line as "Double HH 9/16 in. x 3/4 in. O-Rings, 7-Pack". They have a 3/32" thickness which is standard for the size 113. Yes they are a 70 durometer hardness rather than 90, but other resources on the web say that's ok specifically for the fittings that are being discussed here.
I've only changed one out because it was the only one that was dripping (so far!). I may get to the other three on a rainy day.
Changing it out was a bit of a PITA - but a lot easier than sourcing and changing the whole fitting! There's little room room to work and the groove is a bit down the hole - almost around a corner. My o-ring hook tool didn't work at all, so I used a welding pick to pull it out. I was careful not to scratch the metal surfaces. I cleaned out the groove in the fitting with compressed air and a little nylon brush. I then lubed the new o-ring with hydro fluid and fiddled around for a couple minutes to get it in place.
Hope this helps someone!
WranglerX
Super Member
Same sort of issue and size of "O" ring for my MF 17xx series tractor....