B2601 - LA435 Quick Connect Manifold and Flat Face Coupler Leak/Service?

GreatDivide

New member

Equipment
B2601
Jul 13, 2022
3
4
3
Colorado
Hi All,
Not exactly 'new' to reading here, but new to posting.
For starters, I am no mechanic, but do a lot of my own work because of where I live.
I have a 2019 B2601/LA435/Grappler with 186 hours. I live rural in the foothills of Colorado close to treeline (9200ft) and have been clearing our property of slash due to dry conditions this year.
Two coupler 'o-ring - type' seals' on the LA435 popped over the weekend (red and blue lines). In addition, one seal on the tractor side became slightly marred (blue).
I have read extensively about complaints on this design/concept, about pressure checks, by-passing altogether, etc. But, are they serviceable?
LA435 side (PN 7J065-85160 - $92.00) seems to not be serviceable, as the 'seal' (not exactly an o-ring) is a polymer collar with an o-ring type seal bonded to the outside. You can access this seal for inspection by placing the JCI connector on a bench and pushing down on the outer steel collar of the connector (i used needle nose). This compresses the internal spring and exposes the seal below the piston head (the piston head on this side does not move).
The tractor-side coupler seal (PN 7J626-85290) can be inspected by using a small screwdriver to push the piston into the coupler, which reveals an orange colar-shaped seal. The coupler can be removed by heating the JCI with heatgun (new tractor - JCI had a hard yellow glue) and removing the snap ring below the manifold frame.
As I mentioned above, this seal was only marred on my blue line. I discovered it after replacing the red and blue couplers on the LA435 side (much slower leak). I was luckily able to remove this orange seal and turn it inside out, which stopped the leak (I know this wont last - part will be ordered soon ($55.00).

My question: These couplers must have other industrial uses. And, I have a very hard time throwing away $250 of parts with 186hrs on them because a 10 cent seal popped (engineered obsolescence or not). Is anyone aware of seals kit for these? Or, other applications where the parts might be cheaper?

I have plenty of pictures if anyone is interested.

Note: It was handy to pour talc over the lower manifold and coupler nuts to identify which coupler was leaking and verify it was from the coupler face and not the JCI.
 
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jkrubi12

Well-known member

Equipment
B2601/LA435/QA54"/BH70/B8160box/BB1254/PFL1242/SGC0554/WC-68 Chipper
Sep 24, 2012
397
289
63
right coast
Perhaps if you could find a dealer that will take your unserviceable coupler in 'partial trade', AKA as a 'core', then the dealer could service & resell as rebuilt. If you are replacing one side (or both) of the four-hose Swift-Tach quick-connect(er) devices it might be cheaper to replace that system with standard-type couplers (not recommended).

This issue you experienced is likely an issue experienced by numerous others; I would be very interested in your pics with captions if possible; perhaps you could load them here(y)

I assume with a 'grapple' you have a third function kit; Kubota or LP?

What's your estimate on the number of times you've removed/installed the loader?
 

GreatDivide

New member

Equipment
B2601
Jul 13, 2022
3
4
3
Colorado
I only have one dealer option and it is about 90+min drive. I asked them about re-man / core, but that isn't an option. I have to believe there is a seal kit out there for the 7J626-85290 coupler, so easy to service. If anyone knows of one please post.

The 7J065-85160 does not seem serviceable because the polymer collar/seal seems to be cooked on - it should be able to be re-man'ed though.

The grappler is an LP SCG0660 with dealer installed 3rd function switch, I paid around $3k for it back when. My most used/hand implement.

I've removed/installed the LA435 2 or 3 times for maintenance. It's not an implement I need to remove in my situation. For this repair, I have had it off several more times.
In 2020 the lever on the manifold was popping open on its own randomly (under load and not under load). The dealer performed some adjustment under warranty and it happens much less now. So add 10-12 for that.

Here are pictures of the tractor side (PN 7J626-85290). I'll upload PN 7J065-85160 later.
This is the manifold with talc. It was taken after replacing the red and blue 7J065-85160's. Fluid washing over coupler housing showing the leak was at the coupler face.
AEFBFCA5-AE3F-4841-965F-E838C3ACE1AA.jpeg

A0E756C6-DFBE-4D07-BEDB-C844ECB0867D.jpeg


PN 7J626-85290 on tractor seal inspection
73D11AD6-1273-4604-B7D4-5FA4DCF0DC24.jpeg


on bench inspection (damage to seal)
C1A18779-89D2-4478-B12B-9DC5F34B070A.jpeg


Removing
06C2A365-791E-4A61-B9A1-669B26E9E796.jpeg

8AB33E34-33A1-490D-AFB8-4F8D82220CF8.jpeg
4C9A00C7-D988-432A-BD62-7E2CEACBB816.jpeg


snapring
942DFB98-C522-424D-BA09-15A1424615E4.jpeg
 
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jkrubi12

Well-known member

Equipment
B2601/LA435/QA54"/BH70/B8160box/BB1254/PFL1242/SGC0554/WC-68 Chipper
Sep 24, 2012
397
289
63
right coast
Excellent photos & description.

That device on your workbench is incredible!(y)

I would look into another 'adjustment' on the manifold connection, once you are satisfied with the seals.

Do you have any ideas on how the seals & manifold connection got compromised?

I'll admit I've never even come close to this level of a problem with the 435 loader Swift-Tach system.

I did some hunting, and found a diagram, showing the entire single coupler available as part number '070', perhaps you've seen it? It was an exploded view of the entire tractor side coupler system.
 

JimmyJazz

Well-known member

Equipment
B2601
Aug 8, 2020
1,202
722
113
Pittsburgh, Pa
You might try calling a hydraulic service shop. I had an ancient forklift truck lift cylinder rebuilt not long ago and I was amazed by the thousands and thousands of fittings ,seals, and whatnot filling shelves from floor to ceiling in the place. Worth a try. Good luck.
 
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GreatDivide

New member

Equipment
B2601
Jul 13, 2022
3
4
3
Colorado
Thanks all!
The leaks are fixed and I'm back to work. I will research and call a shop in Colorado Springs when I have time.
I did look at the website - lots of 'everything' there! I will research the tractor side seals there too https://www.mcmaster.com/o-rings/cross-section-shape~rectangle/

I made the welding platform/bench with my 14yr old last year. He has since built the clap apparatus to practice his inverted and vertical welds. Its a sort of fifth-arm modification that's handy for holding almost anything in any possitition. He made four articulating C-clap arms or various sizes.
PAX
 
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