Bobcat E55 Excavator with slow and weak hydraulics. The cause may surprise you.

Troubleshooting a Bobcat E55 Excavator with very slow and weak hydraulics
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[@windzer]

so was that orifice clogged and thats what cause it to start moving slowly?

[@Dadnatron]

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?

[@vincentcalcopietro6970]

This guy is a real champion bloke, and a genius. Always helping, saving thousands to his viewers

[@chargermopar]

No wonder this is the go-to channel for equipment techs.

[@alexandretorres9851]

The best bob cat maintenance channel! Thanks for the class!

[@jonb7470]

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.

[@brucejensen3533]

Thanks for the content!

[@jix177]

The benefit of years of experience! Thanks for sharing.

[@johnathandoe3558]

Awesome video, great detail, thanks so much

[@constructionduru5195]

I've been dealing with this on my sk45. I'll definitely see if I have that on my pump. Thank you!

[@hphillips7425]

Impressive and to the point 👍

[@Thebutteredsausage]

Great video straight to to point! Was wondering if you just left the part out or was it clogged? Thanks?

[@lucmarchand617]

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.😊

[@gregoriotrujillo5706]

Thank you for making this type of video

[@bjarnevarme9830]

Great video 😊

[@gearhead181]

I have an older Komatsu pc50 that does this exact thing is that something that is in most excavator hydraulic pumps?

[@jasonchapman6058]

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?

[@hardialsawh9843]

Hey Brady, Would the sticking torque limiter valve also cause the hydraulic oil temperature to increase?

[@Suds649]

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.

[@iowegian72]

I have this same problem on an E10. Does this fix apply? It's quite a different animal compared to the bigger models.

[@brandoneads5496]

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.

[@GoneUraling]

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).

[@skipwilson4792]

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.

[@keithsharratt3402]

It was working when it was new , what changed , if it's not needed then why have it in the first place?

[@ModelLights]

'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.

[@keithsharratt3402]

@@ModelLights I see , makes sense.

[@sobeit1927]

So is leaving those parts out considered a fix for this problem ? Will it have any knock on issues ?

[@sdk1076]

What caused it to go bad?

[@fonickel6634]

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 🤔🤔🤔🤔🤔

[@antoineturpin9201]

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 ?

[@AutisticDigger87]

very well explained, it is a lot easier to see it on a video than reading about it 👍

[@MitzvosGolem1]

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 .

[@johnathandoe3558]

Such a fine detail that can have serious consequence over time. What a good comment, great attention to detail, never even considered this👍👍

[@MitzvosGolem1]

@@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

[@dwilley3754]

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.

[@MitzvosGolem1]

@@dwilley3754 Makers of hoses like Aeroquip usually clean out but I always flush out well regardless

[@I_Am_Your_Problem]

seen....

[@andyfields3248]

So why does the manufacturer put that in? IE what is the purpose of the orifice you removed?

[@stormqazx]

is it same on 341 G 2004 ?

[@billyhorton5779]

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!

[@precisionfilms3777]

Bizarre. Why would it work with it then need to be removed randomly to keep working normal?

[@ecosmart-buteliiegalizare3001]

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

[@timharlow736]

Thanks for your videos. Does a bobcat t590 work the same way? My t590 responds the same way.

[@tetradgroup]

That would not be the same on loaders

[@shanehumphrey4827]

Must have air in system.i was wrong good job

[@user-xo5bl6yt5q]

Actually had to do the same on e35

[@steveashworth6707]

Is there any longterm downside to leaving the orifice out?.

[@justinb3758]

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

[@bill3641]

The problem is still there, you just bypassed it, right ?

[@garymallard4699]

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 🇨🇦🤓🤟

[@tetradgroup]

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.

[@garymallard4699]

@@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..👍 🇨🇦🤓🤟

[@blondeguy08]

My name is also Brady!

[@sandyjoseph9880]

Have several of those in my spare junk. With about a 50% success rate. Crap in margin spool will cause simular problem.

[@tetradgroup]

Great point, that would've been my next step if that didn't work.

[@sandyjoseph9880]

Not really on the same subject but, what is your opinion on Friday Parts Kubota Engine Parts for V 2203 in a 753

[@tetradgroup]

@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.

[@renesolaire8319]

Hi. What is margin spool please ? Relief valve maybe ? Unload valve ?

[@oscaralvarado9148]

To slow where?

[@jasonmushersee]

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

[@I_Am_Your_Problem]

Not the same function at all.

[@ktuga11]

I used to be a Bobcat dealer tech.. every excavator with this pump in cold weather would suffer! all got deleted

[@blackout7615]

To, two, too

[@antoniocrisafulli4177]

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??

[@I_Am_Your_Problem]

Out of the three of us only one doesn't have a clue what they are talking about.... I wonder who?

[@timharlow736]

It’s a 2017

[@jonathanmcdaniel3081]

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.

[@zaineridling]

Too, not to. 😉

[@pjp80s]

Poor design?

[@Hjfvvdst]

So, leave it out. Clean it. Replace it. Throw it away.

[@tetradgroup]

Throw it away

[@samuelw.3992]

Bobcat shouldn’t have it in there to begin with.

[@bigwoodrz]

You mean TOO slow, NOT to slow

[@johndorazio3759]

New equipment is junk

[@bryanmontgomery996]

To, too, and two. Who cares? Right?

[@earlbrown-ee2nk]

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

[@tommyk1073]

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.

[@tetradgroup]

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.

[@JasonBauder-ki9ji]

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

[@richardedwards2269]

Just shows you can't buy experience.

[@I_Am_Your_Problem]

And common sense is not a thing.