ฝัง
- เผยแพร่เมื่อ 11 พ.ค. 2024
- Troubleshooting a Bobcat E55 Excavator with very slow and weak hydraulics
Check out our special tools and don't forget to ask us about our diagnostic computers.
www.4tetradgroup.com
www.southvalleyequipment.com/
Tools We Use:
Hydraulic Cylinder Spanner amzn.to/3SAlHYw
Another Spanner Option amzn.to/3LR1JFb
Hydraulic Seal Clasper www.4tetradgroup.com/shop/p/s...
Hydraulic Seal Stretcher www.4tetradgroup.com/shop/p/p...
Injector Block Off Cap www.4tetradgroup.com/shop/p/d...
Bobcat Fuel Filter Bowl Wrench www.4tetradgroup.com/shop/p/f...
Wrench Extender amzn.to/3Yt2yvl
Spring Compressor Tool amzn.to/4fA030n
Hydraulic Seal Installation Kit amzn.to/3Yrs6sV
Hand Impact Tool amzn.to/3Sz0yOk
Common Rail Fuel Injector Test Kit amzn.to/4dasD6T
Injector Leak Back Test Kit amzn.to/46Btf3i
Electrical Supplies:
Milwaukee Solder Iron amzn.to/4dpp0cY
Tesa Harness Tape amzn.to/3SAdG60
X Fasten Harness Tape amzn.to/4cbItNA
Non-Insulated Terminals amzn.to/4dp18XH
Shop Supplies:
Gloveworks Nitrile Gloves amzn.to/3WADdwW
Oil Absorbent Pads amzn.to/4ckYq48
Absorbent Pads amzn.to/3WOX64P
Brake Cleaner (Its Really Good) amzn.to/3yse3sA - ยานยนต์และพาหนะ
This guy is a real champion bloke, and a genius. Always helping, saving thousands to his viewers
so was that orifice clogged and thats what cause it to start moving slowly?
No wonder this is the go-to channel for equipment techs.
Im a big cat equipment dealer tech, but man I love your videos. I’ve worked on maybe a handful of bobcats in my life as a tech, but I still like learning how you do it on these machines. Lots of carry over.
The best bob cat maintenance channel!
Thanks for the class!
But why does the basic design require a design change in order to function. That is, why have it, if removing it proves it’s unnecessary?
The benefit of years of experience! Thanks for sharing.
Thanks expose how hyd systems work.lots remove pump get new one and found out is wrong.i work 40 years in heavy equip.western canada the main problems is dirty oil+change oil on time and filters help lot.thanks video.😊
A plugged fuel filter and or air filter can cause a slow non responsive machine. The ecm (engine control module) senses the load and backs off the hydraulics on the pumps so the hydraulics can’t stall the engine. The engine will sound and speed up to the no load speed just like normal. Years ago before the computer controls if you had a plugged fuel or air filter the hydraulics would stall out the engine and misfire because of the lack of horsepower to run the hydraulics at full load.
When new hydraulic hoses are made installed always clean out inside of new hoses .
When shop cuts hose it leaves metal rubber shavings inside hoses.
Which when installed clog stick things ruin a machines pump etc .
I seen so many people just put a new or used hose on never cleaned it out .
Such a fine detail that can have serious consequence over time. What a good comment, great attention to detail, never even considered this👍👍
@@johnathandoe3558 saw it happen.
People in hurry rushing to get machine back in operation.
One small fragment in a spool , valve or something.
Disaster.
That's why when a pump fails debris is pushed throughout entire system almost impossible to get all chips out.
I had a CAT 320 spent days flushing all cylinders all motors valves hoses out.
Still has issues .
תודה רבה שלום
I agree. I used to work at a place where we made hoses and they just cut them with a chop saw. They would have all kinds of rubber and metal still in the hoses. I always flush mine out with diesel fuel before I install them.
@@dwilley3754 Makers of hoses like Aeroquip usually clean out but I always flush out well regardless
seen....
Awesome video, great detail, thanks so much
Wow very interesting. Makes me think bob cat doesn’t like you sharing these issues because they rather you bring the machine in so they can charge you an arm and a leg to fix it.
Impressive and to the point 👍
Thanks for the content!
I've been dealing with this on my sk45. I'll definitely see if I have that on my pump. Thank you!
very well explained, it is a lot easier to see it on a video than reading about it 👍
Thank you for making this type of video
It was working when it was new , what changed , if it's not needed then why have it in the first place?
'then why have it in the first place?' Similar idea to water hammer in pipes, something tells me that orifice system was put in place to stop the extra wear from 'bang-bang' type control.
@@ModelLights
I see , makes sense.
It sounds like that orifice is acting similar to the pilot controls for the cylinders, but to control the swash plate.
Without it, it's making the pump run full pressure all the time.
Sort of like a pressure washer running hard even when the line is at full pressure and the trigger on the wand isn't pulled.
... just a guess, though. 🤷
Great video 😊
Great video straight to to point! Was wondering if you just left the part out or was it clogged? Thanks?
I have an older Komatsu pc50 that does this exact thing is that something that is in most excavator hydraulic pumps?
Hello thank you for sharing your expérience, I have a bobcat e26, sometimes (rarely) my boom won't lift UP back but when I use thé joystick to regain power I just have to pushh back down against the ground and it lift it UP and it IS running back good,
What could be the reason, the spool ?
Thanks for the informative video.
I have an '06 435 with a similar issue. It just recently developed this, and the machine has over 6,500 hrs on it.
Does the 435 pump have the same orifice in it?
Does the orifice need to be replaced, or just removed?
Did you discover the root cause of the issue? What I mean is, for many hours, the machine worked as intended, as designed (with the orifice installed). What caused it to suddenly slow down, when it was working fine before?
Hey Brady, Would the sticking torque limiter valve also cause the hydraulic oil temperature to increase?
So why does the manufacturer put that in? IE what is the purpose of the orifice you removed?
What caused it to go bad?
It is my understanding of Load Sense Hydraulics that is the pressure drop across this orifice that starts the "sense" part of the downstream valve(s) that actually shift to apply hydraulic pressure to move the swash plate inside the pump. Or it could be I am just full of it!
Do the IHI 's have that also? I have an ihi 80 and the hydraulics are slow, all the hydraulics. Mine does not stop and the catch up, they are just slow. Mine is slow tracking, sick boom, everything. I have changed the hydraulic fluid and filter.
I'm assuming since you said there's nothing wrong with leaving the orifice out that this is some what similar to the T590s "over the shoulder piece" the little pintle and spring that cause the joysticks to lock up 🤔🤔🤔🤔🤔
Must have air in system.i was wrong good job
Is this on an E26 and would that explain why it would move slow for maybe 3 seconds then speed up to normal? Most of the time it's fine, but every now and then any movement will start very slow up to 3 seconds, then suddenly to go full speed. In 50 hours or so it has probably happened 8 or 9 times and while colder, doesn't do it when hot (yet).
Thanks for your videos. Does a bobcat t590 work the same way? My t590 responds the same way.
That would not be the same on loaders
So is leaving those parts out considered a fix for this problem ? Will it have any knock on issues ?
I'd like to ask about a 324 I have. The swing is slow, but I can speed it up by moving the crowd or the curl stick a bit. It is like it ups the fluid flow. Would this be the same sort of issue ?
Hope I'm describing that right.
Actually had to do the same on e35
Bizarre. Why would it work with it then need to be removed randomly to keep working normal?
I have an E35 have the same problem
Have several of those in my spare junk. With about a 50% success rate. Crap in margin spool will cause simular problem.
Great point, that would've been my next step if that didn't work.
Not really on the same subject but, what is your opinion on Friday Parts Kubota Engine Parts for V 2203 in a 753
@sandyjoseph9880 over had mixed reviews with friday parts, sometimes orders take a long time to get. I got a head for a v2203, installed it and then found they machined thru a cooling jacket into the exhaust port. Flooded my engine with coolant. That cost me time and money.
Hi. What is margin spool please ? Relief valve maybe ? Unload valve ?
is it same on 341 G 2004 ?
The problem is still there, you just bypassed it, right ?
I have this same problem on an E10. Does this fix apply? It's quite a different animal compared to the bigger models.
Same... expect it's only on certain cylinders.
I have a feeling mine is more of a "controls" issue (pilot controls or control valves).
Both joysticks have a ton of excess play in them.
Hey, i have the same situation on a Takeuchi tb145, year 2006, but I have just 1 cilinder really slow, the stick cilinder. What do you recomand to look? It is posibile to have this orifice / plug / pin for only 1 cylinder? I change all the seal of this cylinder. Thanks
I used to be a Bobcat dealer tech.. every excavator with this pump in cold weather would suffer! all got deleted
My name is also Brady!
Is there any longterm downside to leaving the orifice out?.
Dealer told me not a problem when I had this issue 2 years ago. Not sure why it’s there if it’s not needed
@justinb3758
Just like an EGR valve... your car will run fine without it, but its function is for non-performance issues. 🤷
Was the other parts sticking? That fixed it but i would say there is another issue to consider causing this problem...if it worked with that part in from new ok..then now there is another problem causing it to need removal to work..
50 plus years fixing stuff
🇨🇦🤓🤟
The orifice is designed to help smooth the operation of the pump. However, there is no noticeable difference with or without the orifice. The flow of oil is too slow to get the pump stroked with the orifice over time. We've been through many pumps trying to find the cause with no luck. The theory is there is a minimal amount wear on the torque limiter, causing it to not shift smoothly. The only option is to replace the pump or the torque limiter, which is more than the pump, then it will need a pump setup once installed. This could be around $5k to repair. Removal of the orifice is a Bobcat suggested repair process which we've done for many years, and never have I seen an issue after removing it.
@@tetradgroup
yes as i thought...another part causes this problem..but expensive to do the full repair..this is a cheaper option and what i would choose...thanks..👍
🇨🇦🤓🤟
To slow where?
It’s a 2017
So, leave it out. Clean it. Replace it.
Throw it away.
Throw it away
on my farmall m paulson loader it's called drop retarding valve I removed it because with a worn pump that valve was slowing flow
Not the same function at all.
That doesn’t really fix the problem that port was in there wen machine was new its starts to not work u take a part out that been in there for how every many years what did you actually fix??
Out of the three of us only one doesn't have a clue what they are talking about.... I wonder who?
To, two, too
So in the end, do you leave the orifice out? Why do the engineers put it in if down the road it’s going to fail? Good video, BTW.
Yes we leave it out, the orifice, in theory, is supposed to help keep the hydraulics smooth during engagement but its hardly noticeable with or without the orifice.
Ditching parts isn’t a fix, there is a reason for that part I am sure, what’s the purpose and what’s the downside of not having it…. Clogged perhaps, maybe it’s to slow the flow so it’s not jerky… seems sketchy to just ditch a part and call it fixed.
Too, not to. 😉
Poor design?
Bobcat shouldn’t have it in there to begin with.
You mean TOO slow, NOT to slow
New equipment is junk
To, too, and two. Who cares? Right?
FFS, if you’re going to put a headline on your video, at least learn how to spell correctly. Hydraulics are TOO slow and NOT to slow
My new 19 e35, less than 2 hrs had the exhaust manifold fall off the first day I used it. Bobcat makes shitty excavators, they are Dooson garbage
Just shows you can't buy experience.
And common sense is not a thing.