It's Not Magic. Bobcat Excavator Swivel Joint Repair.
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- Опубліковано 21 сер 2023
- Bobcat 341 Excavator has a hydraulic leak at the swivel joint. The swivel joint allows the excavator to rotate 360° while supplying hydraulic oil to drive motors and blade functions.
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The in the field version of this video is probably rated R you're a better man than I !!!
Thank you so much for taking the time to produce this content! Greatly appreciated.
Any serious repair shop should not be without your seal stretcher and clasp. Great idea.
Awesome video! Hardest repair I have experienced, it was on my X337. Nothing like standing your head trying to get the hoses back on the topside.
My dealer told me it would take a miracle, he wasn’t kidding.
I did the one on my 331 last fall and wish that I had that tool. I ended up using larger hose clamps to get the bands contracted again and it worked but definitely could have marked up the new bands. There was plenty of access from the top with mine though and that is a good thing because I never would have thought to grab the plasma cutter.
Always enjoy your videos, thanks for the time to make them!
For self install without a helper. Try a Harbor Freight atv winch with remote control. Hook up to 12volt and use remote to raise or lower unit into place. I have used this method on heavy control values lifting into position while under a machine.
I wish i would have saw this video sooner. I made the mistake of turning it 14 times and it came unscrewed. Really hard to restart the threads to screw it back on since the house weighs about 5000lbs…
Sou do Brasil e acompanho seu trabalho. Parabéns grandes ensinamentos👏👏👏
Would it not be safer to use the ring compressor as each o-ring is being installed into the bore , as one would do when installing piston rings into a block?
hard plastic wrapped around with a hose clamp will resize rings also
I thought you could turn 16 times!
unrelated, how much for your service truck crane in east tennessee? I need to pick the top of my excavator up out of the road
Superb instructional video. Thanks 👍😊
Unlucky 13 spins and then you are having a bad day lol.
Thanks!
Great videos when useing hot oil to install bearings how hot do you get the oil got a couple to install thanks
thank you for all the insight. will help me one day with my bobcat 430
Where do you get the hydraulic caps? Thats a smart idea
Nicely done
Can you please make a video on the t870 hydraulic track tensioning system. Mine has issues!
We had some issues with those aswell
13 spins? How do know over time, months or even years, where your at with those 13 spins?
It's BS. I don't know why he's perpetuating that myth. It isn't threaded and has no reason to be. You can spin it around all day long if you want. This is evident by the design of the swivel... the channels are circular, not threads
The easiest way to keep track of the rotations is to set a bucket of steam on the counterweight at the start of each job. As the machine turns it spills a little of the steam each time. Keep an eye on the bucket. As the steam gets close to the bottom then you know you only have a few turns left. 😉
@rrrusted2883 I prefer the rope method!!
You just wrap your rope around the base 12 times right at the point that the entire cab unscrews itself and falls off, then spin back 12 times until the rope is completely loose!!
...the only drawback is when you go to move and forget to pickup the rope before running over it with the tracks! 😬
It is Ok to use Petroleum Jelly or hydraulic oil to lube hydraulic seals. works good. I worked for Amoco in the RD fuels lubricants division and am Master Certified. Also you can use the looped end of a piece of piano wire looped and crushed in a piece of tubing to ease in seals, or plastic pry for windshield repairs...
Awesome video, very thorough, great camera angles, explanation on poi t etc. I don't think people understand the money you would have to pay for a course containing this info. Greatly appreciate it!
Good info. Now, I may try rebuilding mine.
Good video!
Have a question 2003 mustang 2044 lost all hydrolics moves back and forth fine but dump and lift don’t work I put a gage on the house straight out of the pump and I’m getting 500 psi at full trotle. Think it’s the pump?
Where do you find those big snap ring pliers?
Where can I find (buy) both the seal stretcher and the clasp tools?
I find it’s easier to jack up the cab and screw the track assembly back if my excavator comes unscrewed. Lately I’ve had to be really careful on rotating around because I lost count.... so hopefully I’m not at 12 revolutions.
I use to make these . Machining and assembly at the bobcat plant in Bismarck ND.
Question about case return. I have a 2019 T770 enclosed cab. Is there a case return is there a filter or some type of check valve? I have blown the motor seal on the output shaft on two different disc type forestry mulchers allowing hydraulic fluid to go into the gear box then blowing the bottom seal on the gear box. One Kubota and one Diamond brand mulchers. Mulcher dealers say when the cutter disc gets loader to heavy or stalled the return on the Bobcat is not accepting enough fluid. Any suggestions?
No checks or filter, only main hydrostatic filter. Back pressure on case drain line could get up to 50 psi. Tee in a gauge to the case drain line at the quick connector and monitor pressure. Replace main hydrostatic filter as well.
Could that inner section be put in the freezer to shrink, or would that not be as good idea?
... i would think it could, and put the outer assembly in the oven, just set it at the lowest temperature, and lube the hell out of it when trying to assemble it... ✌🏼
A friend of mine did that with a press on ball joint for a power control arm, for a Civic. He lubed it with slick 50 or some Teflon lube, the joint slid down itself into the fitting by itself.
I currently have the swivel out of a 2011 E50 for seal replacement. I want to replace all the rings on the fittings. Are the rings standard or metric? Durometer 70? Anything special. I want to use quality replacements as we all no a real pain to access. Any help or suggestions appreciated.
You should be able to order the seals straight from Bobcat, that way you know you have the correct quality seals.
Thanks! That's exactly what I will do.
That’s totally magic!!
How many connections can be obtain on a swivel rotary union?
As many as you want!... until you run out of space because it becomes too large!
Bobcat dealer told me that they would have to separate the top on machine from the track frame to replace that joint I see they where wrong. Is it true it will come apart after 13 turns in 1 direction. Have a great day be safe
No, just a bad joke. It will spin in any direction indefinitely
@@tetradgroup I figure it was a joke but just wanted to make sure cause I didn't want some rookie on my excavator just to see if that was true. Nice video. I Learn something today about how to repair something. Thanks
Does swing motor gets the fluid from swivel or control valve?
The swing motor should be with the cab, so it doesn't run through the swivel joint.
Yes, it's operated from the control valves (as it's controlled from the joysticks).
@@jasono2139 thank you jasono
Tom Scott shows a nice animation on how this works, but for fluids on a roating house.
Why there is 13 rotation is limited
Just a joke
...because it's an unlucky number... and excavator engineers thought 14 threads would cost too much!
...that Swivel Joint, is where the "FM" happens. I heard many complex things called that, when I was working for G.E. Computer Services at DFW Airport. A lot of ex-military guys used to work for RCA/G.E. Computer and Electronics services, many with Radio and electronics military training.
I was very naive at the time, back in 1996. I asked one of the Senior techs what "FM" stood for, he replied, that's where the "F@#King Magic happens 🤣🤣🤣🤣🤣🤣
its a rotating oil distributor not a swivel joint 🤣
you're gorgeous ♡
What’s with this turn 13 times and it unscrewed itself joke being so serious always
Ya’ll keep confusing peeps
Why are you perpetuating that myth of unscrewing the cab? That's total BS. You can spin it in circles all day long if you want.
No its not a myth. You can only spin an excavator so many times before it unscrews itself
What do I do now? I'm not sure if I went 10 × 2 the left or 8 × 2 the right. What if the last guy didn't write it down? The 4 times he went left. I'm so confused😅
I’m curious..did I hear you correct? The house can be swung 13 times in any direction and it will come loose? Is that a joke or are you being serious? I’ve never heard of anything like this.
No, he's full of BS. It just spins around in circles... it's not threaded.
@@pegbars lol..good. Thought I missed something
@@pegbars 🙃
How many years of experience have you got with heavy equipment? @@pegbars
People... come on! 🤣