|
|
Got a thumb on order and need couplers. I'm guessing this is a very common question for people - which ones do I buy?
I did some online searching and came up with these numbers for the ones possibly on the machine.(need some to hook to them)KV13884, sub for 4486229KV13885, sub for 4486230Also found listed:AT312877Does that help narrow down what I would buy to plug into them? Thanks in advance
I'm very much a novice to excavators...been using my old WD Allis Chalmers since the 90's for everything.Got tons of work done with that tractor, but it's amazing how fast and versatile this excavator and the Bobcat 873 are in comparison.Oh, the thumb is a 27" hydraulic: https://linvilleindustries.com/produ...backhoe-thumb/Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:Thats a very good price for a hydraulic thumb. I can't help you on the couplers
Reply:Can't help you on the couplers normally I'd just buy a set and change out what's on the machine... especially if their some odd ball ones
you might post up pics of the ones on the machine along with measurements...
One thing I'd definitely do is check and reset the thumb pressure relief to 3500PSI
Reply:For that setup you can probably use standard ag type 1/2" pioneer couplers. Is the machine pre-plumbed? I like to stay away from pipe threads for that stuff and use O-ring boss fittings on the hose ends that connect to the coupler halves. If you do go pipe threads, Loctite 567 pipe sealer is the stuff. I've used it on drill rigs that had some heavy pressure spikes and it holds up well and you can still unscrew the fittings.
Reply:Oh... forgot to add earlier... on a thumb like you're getting you really don't need quick-couplers.... anyways... unless you're planning on getting more attachments like a hoepac, woodsplitter, breaker,mower,etc... if you do put QC's on it then don't use them for a year or two they will probably be stuck/rusted on and won't come off quick anyways
Reply:
Originally Posted by ronsii
Oh... forgot to add earlier... on a thumb like you're getting you really don't need quick-couplers.... anyways... unless you're planning on getting more attachments like a hoepac, woodsplitter, breaker,mower,etc... if you do put QC's on it then don't use them for a year or two they will probably be stuck/rusted on and won't come off quick anyways
Reply:Can’t help with the connectors but wanted to comment that you’ll wonder how you ever did without the thumb. I’ve had them on excavators and have one now on my Kubota backhoe.Miller 350 DynastyMiller TrailblazerMiller 625 Plasma Lincoln Power MIGVictor oxy/acetyleneHyperthem 85
Reply:
Originally Posted by 12V71
True.... Especially those flatface types. I hate them.
Reply:
Originally Posted by ronsii
Can't help you on the couplers normally I'd just buy a set and change out what's on the machine... especially if their some odd ball ones
you might post up pics of the ones on the machine along with measurements...
One thing I'd definitely do is check and reset the thumb pressure relief to 3500PSI
Reply:
. This is the best stuff I've ever used for pipe threads. Even on angled fittings that you can't always get tight enough it never fails to seal. Pretty pricey but it's a one and done deal.Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.
Reply:The permatex # is 5454O , which works equally as well.Miller xmt304, Miller S22 p12, Miier Maxstar SD, Miller 252 w 30A, Miller super32p12, Lincoln Ranger 9, Thermal Arc 181I with spoolgun, Hypertherm 10000 ,Smith torches. Esab 161lts miniarc.
Reply:
Originally Posted by MinnesotaDave
I looked up 1/2" pioneers, they look to be cheaper to buy all 4 parts than it will be to buy just the 2 ends I need.I wonder if the ends of the pre-plumbed pipes are just NPT or some weird o-ring connection.
Reply:Funny though... Out back, the backhoe fittings are flat faced and they work fine....
Miller 211Hypertherm PM 451961 Lincoln Idealarc 250HTP 221 True Wisdom only comes from Pain.
Reply:All, and I mean ALL my hydraulic threaded connections get the Teflon Tape treatment. Because...............ya might wanna take them apart one day.
Reply:
Originally Posted by farmersammm
all, and i mean all my hydraulic threaded connections get the teflon tape treatment. Because...............ya might wanna take them apart one day.
Reply:Tape can get a bad rap because of faulty installation procedures. 4-5 wraps, and tighten her down WITH LESS THAN A 6 FOOT BREAKER BAR
Make sure you wrap the tape in the opposite direction of the thread. A taped joint doesn't require excessive torque to seal perfectly.
Reply:
Originally Posted by ronsii
why????
Reply:Might I want to get this apart sometime in the future?
You betcha
I put it together 20yrs ago with tape, and it was a snap to get it apart again for the rebuild. Plus, ya don't have all that hardened crud floating around in your cylinder from the pipe dope that ya slathered on the threads.
Reply:Pro tip: If you leave them a bit loose the oil leak will prevent the threads from seizing
Reply:
Originally Posted by ronsii
Pro tip: If you leave them a bit loose the oil leak will prevent the threads from seizing
Reply:
Originally Posted by 12V71
True.... Especially those flatface types. I hate them.
Reply:
Originally Posted by ronsii
Pro tip: If you leave them a bit loose the oil leak will prevent the threads from seizing
Reply:
Originally Posted by farmersammm
I can hardly count the number of times I've dealt with an old piece of equipment that the previous owner had slobbered pipe dope on the threads. Takes an Act of God to get it loose
Reply:
Originally Posted by 12V71
And I can hardly count the number of times I've had to trace out a sliver of tape plugging a tiny orifice that's keeping a quarter million dollar piece of equipment from working. Most good sealers will dissolve in the system and not cause a problem. Most every hydraulics manual for Caterpillar, etc. says DO NOT USE TAPE. I been there and seen that. Rebuilt a very expensive Cat loader transmission over a plugged .030 orifice, it wasn't getting full clutch engagement pressure and we all know what that leads to. Stupid part was that some idiot used tape on a bunch of O-ring boss fitting that didn't even need it.
Reply:
Originally Posted by Lis2323
Yup. HATE HATE HATE Sent from my iPhone using Tapatalk
Originally Posted by farmersammm
The trick is to wind the tape short of the end of the thread so that it pushes back up the thread as it's tightened. I guess I've been lucky.Dunno why anybody would use tape on ORB fittings (shrug) it's only for NPT stuff.
Reply:I like the yellow "teflon" tape, for gas pipe, it's supposed to be more hydrocarbon resistant. I've never had any problem with the white stuff either though.
Reply:Dont you guys just love using Teflon tape on a machine fitting outdoors and there is NO WAY to block the breeze????Sent from my iPad using Tapatalk:
Reply:
Originally Posted by Lis2323
Don’t you guys just love using Teflon tape on a machine fitting outdoors and there is NO WAY to block the breeze????Sent from my iPad using Tapatalk
Reply:AHA. I just managed to find a photo ( no comment please 12V71
)These are METRO couplers we used to use on the farm. We converted EVERYTHING to them. They connect and disconnect under pressure with about a 90° rotation. Worst case scenario if you were wimpy you could always say your hands were greasy and you used a big adjustable wrench for the part turn.
Sent from my iPad using Tapatalk:
Reply:
Originally Posted by Lis2323
AHA. I just managed to find a photo ( no comment please 12V71
)These are METRO couplers we used to use on the farm. We converted EVERYTHING to them. They connect and disconnect under pressure with about a 90° rotation. Worst case scenario if you were wimpy you could always say your hands were greasy and you used a big adjustable wrench for the part turn.
Sent from my iPad using Tapatalk
Reply:
Originally Posted by ronsii
I haven't seen those on any machines around here... )
Reply:
Originally Posted by Lis2323
It would be a bit of an exaggeration but I’m tempted to say I may have bought them all...
Sent from my iPad using Tapatalk
Reply:
Originally Posted by ronsii
Do those still have a slip ring on them for release? or is it simply a twist that 'unlocks' them?... I see you have them mounted in bulkhead type configuration... would make a slipring harder to use...
Reply:I'll bet you guys remember when I retrofitted my setup to ball valves. I was having the same problem mentioned. Total PITA to connect/disconnect implements. I lived with it for over 20 years, then got fed up with it FINALLY.Relieve the pressure on the tractor side coupling by closing the ball valve allows you to shove the implement line into the coupler even if it's pressurized, and you don't care to crack the line to relieve pressure. The trapped pressure simply doesn't affect how the two leeeeetle balls interact, because your tractor side is already depressurized. Implement ball thingy just goes in eeeeezy peeeeezy.I still pop the sleeve to remove lines after working, but it's with about 10% of the effort it used to require. Simple tap with a wrench/hammer/hitch pin. My life got so much easier.
Reply:I guess I coulda done a simple bullkead thing......................BUT THAT WOULDN'T HAVE INVOLVED HOURS OF MACHINING, AND MEGA PAGES OF THREAD CONTENT, REPLETE WITH GOBS OF PICTURES
Reply:
Originally Posted by farmersammm
I guess I coulda done a simple bullkead thing......................BUT THAT WOULDN'T HAVE INVOLVED HOURS OF MACHINING, AND MEGA PAGES OF THREAD CONTENT, REPLETE WITH GOBS OF PICTURES
Reply:
Originally Posted by ronsii
I haven't seen those on any machines around here... yet. I can see where they would be handy
Reply:Well the hydraulic cylinder was 2" too long, so a farm scrap took its place
The thumb was well used immediately, and for the rest of the day
(
not having a thumb from the factory is stupid....)Sweetie thinks it looks redneck, I say it's a beautiful thing - LOL
Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:Ran it all weekend again, remembered to take pics of couplers this time
Anyone recognize the couplers?
Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:
Originally Posted by MinnesotaDave
Ran it all weekend again, remembered to take pics of couplers this time
Anyone recognize the couplers?
Reply:Although yours don't seem to have as much taper(1) as they should???I do see some numbers(2)
Reply:
Originally Posted by ronsii
Although yours don't seem to have as much taper(1) as they should???I do see some numbers(2)
|
|
发表于 2021-9-1 23:14:42