Mini Excavator from Alibaba - 10 Problems after 50 Hours
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- Опубліковано 3 жов 2024
- After 50 hours of operating my mini excavator, which I ordered from China via Alibaba, I have had some issues. I'll cover 10 issues, plus how I fixed them and the cost, in this video.
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How much did you pay after shipping, tax, etc. If i may ask? I may be interested in purchasing one also.
There is a full breakdown in this video:
ua-cam.com/video/jfaxFafO8uc/v-deo.htmlsi=FlHyD14bIOqKfiUl
26.500$
@@TK-mk3vq ok thanks for that👍
@@TK-mk3vq 26000 for that chinese pos?
@@TK-mk3vqthat was not cheap for all the quality shortcomings. I've purchased a LiuGong 9027 this summer and after 250 hours it is still like new. Every part of it is just as high quality and the kubota. It has a yanmar diesel engine that runs like a champ. Very happy with my purchase.
I loved your idea that the factory has quality control.
😂
I thought that was funny, too.
Am I the only one that noticed he used 15w/40 motor oil not actual hydraulic oil
@@keziahjones7887 Construction workers don't give a fuck, lmao. I've worked with many of them.
@@keziahjones7887 A lot of small machines use/used motor oil as hydraulic oil. It’s becoming less common though because of some additive that’s no longer put into most motor oils. Toro called for 15w40 for the hydraulics in the small Dingos up until a few years ago.
Good review 👍🏼
You are helping a lot of people to find out the real world differences between cheap Chinese copies and more expensive 'name brand' machines.
In regards to your hydraulic thumb losing pressure, they can develop internal pressure/fluid leaks, with everything looking fine on the outside.
I suspect that is the problem with yours.
Similar story to your other hydraulic leaks, probably a very cheap O ring or seal to replace, but this time a lot of work to replace it.
Keep up the good work 👍🏼
Thank you!
ENGINE OIL in the hydraulics!!!!!! ( 1:00 min in )
@@chrishanson9542 Yes engine oil not all that long ago was superior
to hydraulic oil.
He knew it was cheap and anyone who buys these machines is cheap you don't need to watch a video to know chinese cheap is junk shit haha but good vid
@@chrishanson9542that's not crazy, we have a John Deere dozer and they recommend 15W40 in the hydraulics on it.
Nice to see that you've been able to get lots of work done with it! Hopefully it holds up for many years to come.
I hope so too!
This thing has exactly 0% chance to run for years to come.
@@levanat13you are a pretty cool dude.
Then again, I just watched a video of a guy who had 1,700 hours on a smaller version 2 years ago, and he's still using it today as happy as can be.
So you just may be talking out off your a**🤷
So as an operator and an equipment mechanic i can answer all three of your thumb issues.. it doesnt have the protruding grease nipples because they are prone to getting broken off and allowing dirt into the joints as they are directly in in the path of dirt and rocks from the bucket... the big manufacturers have solved that with moving the zerks to the other side or (more commonly in the pin end rather than the hydraulic cylinder...
The pressure bleed of is most likely caused by oil getting past the piston in cylinder to the other side of the piston thus allowing it to relieve pressure on whatever your holding... now that could be the thumb cylinder OR the bucket cylinder doing it. Best to test the bucket bleed off with substantial pressure on it b4 you just rebuild the thumb cylinder.
And last but most definitely not least... that bent pin is a manufacturers defect and definitely not caused by you.... a quality pin wouldve held straight and the log wouldve just slipped in the thumbs grip when you hit the tree or whatever it was you hit. Thanks for the most comprehensive series ive seen so far on buying and running one of theese machines. I was looking at this exact machine and found your first video when i searched for the hidden import costs, i now know its considerably out of my price range and that for me im better off with a used cat or deer machine
Thank you so much for the insight. I am brand new at this and learn so much from the UA-cam community.
Yep, was thinking the same as you about the bypassing piston, I’ve stoked the rod out and have taken off the low pressure side hose and stalled it out while watching for hydraulic oil to bleed out
@johnpike9612 The pin didn't bend it was the "pin bracket" also called a " pin boss" that bent,they are not using a high carbon steel or heat treated steel on this.
Metalurgy is an understanding of what types of steel you need to apply to your product!
Stock mild steel bends easy,and it's what appears to beuseds here.
Note,hit it back over if you can,or it'll wear the pin boss out of alignment, and removing the ram later will be harder.
But then these are cheap products compared to our American made units.
And that being said,a lot of them are made in China!
I'm not a hydraulics expert,and your point about poor seals in the rams may be valid.
But with hydraulic valves, they come with a preset pressure relief valve, which on my system was adjustable.
That being said,I built my own 30' roll off truck bed with 10 foot long rams out of a garbage packer,one leaked,but I never had too much problem with pressure.
There is also a separate pressure relief valve that can be in the pump,or somewhere inline.
I'd say the way tgey plumbed the hydraulics,was to save a few bux,instead of using the proper plumbing or valve body at the hydraulic controls.
The owner should get a copy of their hydraulic schematics and put a pressure dial on ot (temporary or permanent)that shows how much pressure drops off when he moves it.
If they used a hydraulic valve gor a lower pressure, and a smaller gpm pump,you definitely will get a pressure drop.
This could be a serious issue in an area full of trenches, etc.
@davidrussell8795 a two way cylinder has fluid on both sides of the piston separated by seals that are wear items....failure to maintain position can be caused by your diagnosis but 90% of the time the seals on the piston allowing pressure to switch sides of the piston unless you can find a visible leak somewhere. As for the bent pin, you weren't wrong, (intirely) it is indeed mild steel and junk but considerably larger than EVERY SINGLE other part of the thumb and shouldve never been able to bend IF that adjustable pressure relief you mentioned is adjusted CORRECTLY, therefore its still technically a manufacturing defect
@johnpike9612 Well,ya buy a coffee at McDonald's and ya can't expect a nice porcelain coffee mug to go with it, canya?
Orr,as they say: ya get what ya pay for!
But on the other hand,our equipment is wayyy overpriced!
So this little digger can save a fella or gal,a lit of $ in do it yourself projects.
And fix the quality control mishaps yourself!
10 problems after 50 hours is far better than 50 problems after 10 hours.
You have a solid point 😁
Yep. Seems like normal break-in hiccups for any new vehicle or machine. Try as they might (if they try?) they cannot catch everything at the factory. I've had similar little items on a brand new boat, trucks and a trailer over the past 25+ years. First experience had me fuming mad. Now I know--like it or not--it's to be expected.
On the bright side in the winter you have a nice cosy warm cab..
Winter is coming
Nice review. The thumb circuit relief valve is probably set very very low and won't hold pressure. Follow the thumb circuit back to the valve tree and locate its valve layer. Look on line for how to set the relief valve - generally loosen a jam nut and back out or drive in the relief valve spring screw. You should use a pressure gauge in the thumb circuit to see what the peak pressure is - it is generally set lower than the bucket relief pressure setting - so that the bucket can overdrive the thumb if it needs to and nothing breaks.
Thanks! I'll give it a try
Well said . I’m a caterpillar dealer mechanic for 35 yrs and would start with what you suggest. Best case scenario is a relief set too low and only needs adjustment.
Another very good presentation which seems surprisingly absent with the thousands of other reviews. Really appreciate the honest and open perspective.
Much appreciated!
I just released a video after 150 hours of operation.
I used to be a heavy equipment mechanic, my company sold Terex equipment. They all had the same quality control issues
Sounds like the entire industry needs an overhaul
I hope problems won't start now I write it, but I have a Bobcat 2,7t Excavator purchased new. 140 hours now and zero issues 😉 But I guess the price difference is remarkable as well. I didn't get a Chinese machine since I wanted something that simply works.
Yeah that wasn't in my budget. Your Cat should keep on going strong for many hundreds of hours.
@@einarmikkelsenPNW Absolutely fine, I considered a Chinese machine as well to save money but in the end my time is quite constrained. Still, you will get a lot of useful work out of it and enjoy using it!
@@einarmikkelsenPNWmany 1000.of hours u mean. Standard western diggers 8to10000.hours
@@jasperaj1 Keep her maintained, you could probably push 20,000 hours outta her. Make sure her engine oil is changed and you use good fuel too.
@@britishgamer666 not a chance your average 345C and D models do 16000 and its pretty well worn after that smaller machines you will get a good 5000 then they will start costing more than they are worth
I think you have a good buy, many of the big name machines have lots of problems too, but are a lot more costly to fix.
I think you are right.
They look super easy to work on compared to cats or Kubotas. Can probly upgrade all the shitty parts as they break whereas I higher end machine cost 3 times as much to repair
The thumb fitting is different because what your grabbing would just sheer of any extended grease fitting. What your describing on the hydraulic issues is internal bypassing of fluid. A cab with no A/C would not work well in the south west in the summer time. Very good video. The main question is are you satisfied with the product? You answered that question. Bring up all the flaws helps the manufacturer know how to make the product better, Thanks for the video.
Got it. Thanks 😊
@@einarmikkelsenPNW You like did a quality assurance program on their equipment , they should at least refund your cost. Maybe pay you some extra.. The main question I would have being in Aridzona . It's at least 100 degrees seven months out of the year. Can you get A/C units installed. I wish they they would put a lot more effort in cab design. I want A/C and comfort. A person is going to be sitting in a cab for hours at a time. it really needs to be the best as can be. Climate control is a major issue. I do like the video, and I have a degree in aircraft maintenance , Specializing in fighter aircraft . The new cockpit designs are awesome, and each aircraft newly built normally has better cockpit designs. Temperature control is a top priority. You are correct to point out all the flaws in their product as now they know they could do better, or use better materials.
@@troyb.4101 Thank you! I am a former Airline Transport Pilot, and currently work as a firefighter at an international airport, so I know exactly what you talk about. I wish there was an AC option for my rig. My solution was to remove the door, duct tape the sliding window in the open position, and keep the fan going at all times. I haven't looked into AC, but it would be a game changer. I would first install a fan to exhaust the heat from the engine compartment and add insulation to the fire wall.
@@einarmikkelsenPNW I Will be putting a lot of money into one of these machines soon. I want certain items, and abilities from the machine as I'm 62 years old, and have to maintain my ranch on a very limited income. I only hope some MAJOR improvements are coming soon. It would be better to have the manufacture design every thing for operator comfort. I'm just too old to be cooked all day long!
Thank you for your review Einar!
My pleasure!
Minor issues my man, I'd be quite happy if those were all I had after 50 hours.
The great nipples on the thumb are different because standard zerk fittings would get broken off in that location, it's normal practice.
Thanks. Yes, all minor issues. I love the machine.
Kind of concerned about the oil you pictured at 0:59 - Mobil does have a Delvac brand hydraulic fluid, but what you pictured is engine oil. Is that what the manufacturer specified?
Glad I wasn’t the only one who saw lol😂
Scrolled so long to find first comment about engine oil vs hydraulic oil
I accidentally showed the wrong container
It’s normal that you can’t keep pressure on the bucket/thumb. On all excavators it’s similar. It’s because the oil is not compressible and to keep the pressure is a matter of few ml. And with conjonction with the cylinder seals, that are not supposed to be super sealing, because they are heavy duty sealing, they are not rubber but metallic rings, similar than the ones on piston motors. This technology is super durable but it does have a slight leak. The light duty cylinders have rubber seals and can keep pressure a long time.
About the tracks and bucket/arm/boom plumbing disorder : it’s not a disorder, it’s a matter of oil sharing in the system and all excavators are similar. But complex excavators does have very complex priorities systems that makes the problem much less obvious. A tracking excavator normally have 2 pumps, one for each track, and from those 2 pumps the other functions are also plumbed. Usually the boom is not plumbed on the same pump than stick so they can move 100% independently. But normally boom is plumbed with bucket so if you want to use both the same time you’ve got to learn how to manage, the one with less pressure will move first !!
If you want the pressure to be kept you have to install an accumulator on the pressure side of thumb. Choose one that can withstand the max pressure of your machine. But I think it’s not necessary, for short time holding time the small amount of accumulation provided by the flexible hoses during pressure build is enough.
Thanks
the lot of these "mechanical" issues could be fixed if they had trained mechanics at their factory. Seems like they might be stretching o-rings to fit. Or just low quality o-rings in general. The thumb losing pressure on squeeze can be fixed if you can find a similar cylinder size and length to install. Or the valve spool allows too much leak by.
Only way to know for sure is hook up flow gauges in certain spots to know what is leaking internally where. Im sure there are youtube videos somewhere or online guides if you wanted to know for sure if it was the cylinder or the valve spool.
Edit: additionally, if there is a seal kit, you could redo the seals for the cylinder. Also do a visual inspection of the valve body that controls flow to the thumb incase there is no external leaking
Thank you very much for all the great info. I'll be checking it out.
ENGINE OIL in the hydraulics!!!!!! ( 1:00 min in )
@@chrishanson9542 engine oil for hydraulics is normal. we use 10w30 engine oil for case skid loaders. scissor lifts use automatic transmission oil
@@InevitableTruth247 you can get problems with cavitation and rust using engine oil as water is absorbed by the engine oil while hydraulic oil would not.
In Italy we say: "the less you pay, the more you'll have to pay"
In English we say you are correct
so if you do not get the enclosed cab many of these problems will disappear.
The majority!
Your thumb is bypassing hydraulic oil in the cylinder of at the control valve.
Thanks
great details, love this video
Thank you!
You buy cheap you buy 5 times, But I hope you get a good run out of it. I bought a used Yanmar Vio17 with 800 hours on it. Several hundred hours of heavy use later, and zero problems. Kubota and Yanmar every day of the week (in my opinion)
At least mine has a Yanmar engine 👏
The grease fittings are different for range of motion. The thumb would crush the fitting during operation
That makes sense.
@nathangregory9002 is that how he acts?
Got it
The grease fittings can be swapped easily, Unbolt them and bolt in the correct fitting.
Thanks
They are that way for a reason. That is a high material handling area and will plug up or break off
The low pro fittings on thumb are a must... I’m surprised they even put them on there. Standards ones will be broke off in no time
Thanks. That is what I have since learned.
Changing grease fittings is an extremely easy job to do yourself
Absolutely
Not as easy as breaking it off will be if it’s changed to the style that sticks out.
Man, thanks for showing.
You bet
The central hydraulic pump is not strong enough to run all the hydraulic motors at one time.
Got it.
Sounds like the thumb is bypassing internally. The seals on the piston are likely not properly installed, since it's new they are likely installed wrong or damaged. You can try and tear it down and replace the seals yourself or take it to a hydraulic shop and get the pros to do it. Some of these seals can be a real pain so they will likely make you bleed, be warned.
I bet the hydraulic motor doesn't have enough juice for both tracks and whatever else you try and do at the same time. I think that's something you'll likely have to keep in mind.
You'll have to switch out those fitting on your own bud. I bet the thumb isn't even made in the same factory lol.
I'm also willing to bet there is HOT HOT engine components behind that back wall and that is why it gets so hot in the cab from it. You could try looking in the engine compartment to see what is in there and attach a fan to blow across the engine compartment.
Thanks!
@@einarmikkelsenPNW Or have a separate plate to take the radiant heat. Just like under cars they have this barrier of standing air between 2 plates between exhaust and the body of the car. If there is room for it, but that is a diy and a half :)
@ 5.37 when you change direction by curling the bucket. Effectively you starve 1 track motor of oil when you curl the bucket. The digger is built down to a price, and this is 1 area it shows.
That makes sense
My Yanmar B22 will slow down one motor when traveling and trying to lift the boom or another control.
But the motors aren’t effected if you operate the blade when traveling, I think a lot of smaller machines make the blade priority when traveling for grading. Most of the time you don’t need to travel and dig at the same time. I’m pretty sure that’s not a “problem” on your machine, it’s more of the functionality of the hydraulic spool valves. Thanks for posting 😊👍
@Mikefestiva I appreciate your insight and feedback.
pressure relief valve may be actuated and cause the thumb to lose it's grip. might need it to be set a little higher pressure before the relief pops off.
It could be, but be careful with that. Remember seeing Jesse Muller bending the rod for his thumb, but that was because of NO pressure releif valve. He mentions that you can adjust it. ua-cam.com/video/XDNcNV6lPhg/v-deo.html
@@djdeaf13 remember the "quality control"
For sure be careful with adjusting that valve, use a gauge to adjust it.
Thank you
Thank you
Good call.
Thank you for posting this
You're welcome
You can put in a grease zirc for that thumb that will match the others. Can likely get at Tractor Supply - or that type of store.
The thumb hydraulic creep on the thumb is likely leakage inside the hydraulic control valve...that can be difficult to fix.
Thank you. I think I will keep the fitting that is there now, as many people say that I would break off a zirc fitting. It is flush for a reason. Makes sense.
all i find strange about the thumb grease zerks is...why not drill the pin and recess it in there? like all the other pins?
"options that i got".
its the afterthought sitting on the shelf over there, and we throw it on the orders that asked for it... if we remember to...
the hot firewall may be nice in winter. may want a decent auto fan stuck under there for summer? may find its more about heat flow management rather than any insulation... badly placed oil cooler, and yeah... its pretty tight in there...
I'll look into getting an auto fan.
Really not bad
Id get that thumb checked
Sounds like another o ring on your thumb is leaking back
Check your cylinder o ring
I think you are right
You will find that while tracking and move the boom at same time it will affect the direction of travel I find it’s more of a problem with smaller machines the thumb might be losing pressure internally in the ram good luck with it personally I would never buy anything but a Kubota
Thanks
In Australia when you are paying 70 - $80,000 for a 2-3tonne mini excavator and you can get the same size out of Chine for $10 - $25,000 ( cheapest to medium ) get it back in your country, put $5 - 10,000 into it to upgrade most of the running gear, you have your self a pretty good machine for $30,000. For $30K in Australia you would get a small machine with about 6- 8,000 hours on it that looks like they just dragged it out of an old army machine graveyard Fromm WW2
I am very happy with my excavator so far. I like the idea of putting money into upgrades
Not sure about the accuracy of your pricing for a new name brand excavator in Australia. I found a new Kobelco 2.7 excavator for sale in NZ for a price of AUD$35000 which includes a GST rate of 15%. I think the new price would be similar in Australia. However in general we do get scalped with highly marked up prices in Australia. Not even mentioning real estate.
I may be mistaken. But the 15w-40 your using for hydraulic oil is actually motor oil. Might want to check on that before you lose your hydro pump
I accidentally showed the wrong fluid container
15W40 Engine oil is used by many, many heavy equipment dealers in all types of equipment. As to the high temperatures behind the operator's seat, personally I would concern myself with that issue before the others as the manufacturer put a larger engine in your machine and I can only assume it's Not being cooled or vented properly or good enough. Buy a cheap laser temperature tool and see how hot the engine compartment is, the heat is not good for the machine and could even be causing hydraulic oil issues on the machine! I'll also guess the hydraulic fluid cooler is way too small and possibly not vented properly leading to even more issues down the road. I suggest a trained heavy equipment dealer looks it over as they know best, most times! 😊
Thank you. I accidentally showed the wrong hydraulic fluid in the video.
Thumb issue could be a few things, bad relief valve for close function, cylinder seals bypassing. The travel issue or it turns when multi function operation is lack of pump oil for all functions so the travel circuit is the one that suffers the most. Better machines with slightly more complex hyd systems ensure travel circuit is priority and it’s the other functions that suffer the loss of speed. Hard to say otherwise without hooking some gauges up to it and seeing what’s going on.
Thanks
Nice machine.. thanks for sharing your experience. What is the digging depth.
10 feet
The travel issue is probably because the pump can not supply enough fluid to do multiple actions at once.
Thanks
😂😂 hydraulic thumb "....it slowly releases presure...." *walks under boom*. Interesting review series, often wondered at just how bad the cheap offshore stuff is, and if it's possible to do like you are, and just go through it as stuff breaks and falls off to sort it out.... but looking at that thumb... You are a braver man than me.
😂 It releases pressure over a long time, not seconds. I have been able to fix everything so far.
@@einarmikkelsenPNW yeah I get that... but if it releases, it releases. Just be careful bud. Dont put yourself between a machine and something that is less squidgy than you. Be it the ground, a wall or another machine.
@@breaking_mowers3811 good call
Who advised you to use that oil as Hydraulic oil? Because that is not Hydraulic oil. Thats a lube oil for Diesel engines. Its gonna wreck the Hydraulic pump if you keep running on that. It slowly eats the hoses en rubber seals from the inside contaminating the system .
I showed the wrong container in the video by accident.
im going to buy one in the philippines .....but im thinking of buying used...thank you for the video....the only Chinese brand I like is xcmg
Good choice!
Don't feel bad about your thumb. Mine was brand new from cat, and it loses pressure over a while. Not really an issue since I just use it to pickup trees and toss them.
Also about your zerk fittings, rotate the ram to the other side and replace the zerk with a standard size. If you leave it in that spot, it'll probably snap off picking up logs 🤣
Same here. I don't know if I will take mine apart. It works too well.
That is a very good point
9. and 10. thats a problem with hydro pump . its weak so cant do it all, you need go one by one
Thanks! I'll check it out.
The thumb probably releases slowly because of air in the hydraulic lines.
Thanks
Bypassing
Is it still working ? 😅
Yeah, man. There are a few follow-up videos you can watch. I love it.
The thumb doesn’t have a zerk fitting because it would get broken off by debris where they are located.
That makes sense. Thanks.
Thank you for making this, not sure why you would recommend it though. I got the impression that Chinese build things like they build their buildings…
All these issues are very minor. If you look over the comments on this video, people are having the same issues on all name brand units as well.
the cylinder for the thumb probably needs a better seal on the inside. if you pull it apart you can usually just measure the old one and find a replacement. You already can see the seals on this machine are junk as you replaced multiple already LOL
I will do that. Thanks!
i would check up with your walmart or the person who recommended the 15w-40 engine oil as hydraulic oil cause my guess would be that that stuff is way to thick to run properly seeing regular hydraulic oil is alot less viscose than 15w-40 which is normally a engine oil for engines with some wear or big diesels hell it even says it on the can you showed "heavy duty diesel engine oil" which is a very different application than hydraulics
So sorry. I showed the wrong container. It is so similar to the hydraulic fluid container.
Do theses implement work on other mini
Yes. It is a standard size
At 37 seconds in looking at track drive, was that a snake???🐍
Hahaha 😂 No, that was the track moving in the background.
I import a small tractor from Alibaba. To my surprise so many taxes and other hidden cost. it went from 3,000 to 19,000
it is mind buggle to import without experience.
That is insane! So many fees that you cannot know about ahead of time.
how much did excavator cost you?
hope you dont mind.
👍
Please check out my video on ordering and the video on taking delivery. I have a spreadsheet of all the costs broken down. I just can't remember. $27k?
@@einarmikkelsenPNW
Hello sir
thanks for your kind answer.
real question is how much time you have to work to earn that machine. I think That's realy money valiue of stuff.
Im not great In english hope you can read my try 🫣.
wish you all the best
greetings from Slovenia EU
Buy a kubota
The best part is when you sell the machine. Lol
It wont resale for much
Interesting video
I am so glad I buy kubota 🙂
Thank you. I will keep it.
Actually, I don’t think that’s true at all. A great thing with the Chinese machines is that the spares and accessories are much cheaper, and a lot of the mechanical equipment…engines and pumps are mainstream, proprietary makes anyway.
@@martinsaunders2942
Do you actually own any machines?
Moving and using boom or stick... there is two hydraulic pumps, when tracking each motor uses a pump each, boom and stick use pump each, so when tracking/ moving then use any other hydraulics your taking power from motor using same pump.
Thanks
All the machines do that at 6.27 from cats to chinese, if it did not move because you are working the levers all together, if they didnt do that you would have valve blocks everywhere, normally blade goes up and down and the turret spins while travelling- because it has a rotary distributor in middle of machine on platform.
Thanks
It's normal for the travel motors to slow down and cause you to veer right or left if you use the bucket or some other function while moving. ,y takeuchi Wil do that. It's a symptom of some ofmthe hydraulic flow being robbed from the travel function to do another task.
My machine has 2 pumps, one works the right track, boom, swing.....the other works left track, blade, bucket etc. So the right side will slow down if I swing the machine while moving since that side pump is running 2 functions while the other side is simply travelling
Now I know. Thanks
exactly, i own the smalles yanmar mini(0,8T) and it also has only 1 pump, same "problem" while moving the machine.
@@B100-c4m It is a bit annoying, but for the price, I can deal with it.
My New Holland doesn't.
as far as you comments related to the tracking while doing another function. - the problem is will all excavators. my CAT304 does this worse then any other. This is due to the mashine having limited ways it can use its 1-2 hydraulic pumps. the same pump that controlls your tracks is shared with something else so you can't spin them in different directions at the same time.
also with the thumb bleading off. this is likely a problem with the cylinder it self. the packing/seals on the end of the piston rod (also known as the pistion seal) is bypassing slowly. this problem will get worse over time. i would recomend handling it before it gets worse as damaged seals can cause contact with the rod seals and the inner bore of the cylinder wall making what is likly a sub 50$ fix a 500-1000$ one.
Thanks!
Those two grease fitting are in an area that would possibly be compromised when using the thumb.... I know, they thought this through but missed so many others.....bummer
Good point. Thanks
You are loosing griping power on the thumb is because the seal for the hidraulic piston is worn out. Thats one of the causes i wod start there(rebuild kit for the hidraulic cylinder.
Thanks!
@@einarmikkelsenPNW i would do a full rebuild not just the piston
the hydraulic cylinder is bypassing internally , its a small cylinder it would be easy and cheap to reseal
Thanks
The thumb cylinder may be leaking internally
I think you are right.
Hello there. Accidentally saw your video. About the thumb- that's kinda normal to lose pressure (I own multiple brand new kubotas and caterpillars and all of them lose grip tension on the thumb overtime) .it's the solenoid inside losing pressure most likely.
About that brush strip I can give you part number from my caterpillar one(which visually looks very similar only longer).I recently bought one at cat and it's 3 ft long with super sticky tape in the back. Paid $6 or 7.
How much this machine cost you if not secret?
I have an entire video about the order price and import charges. I think it was about $25k total
Please keep accidentally watching my videos :)
I want 3 of them with attachments.
Nice!
Your video shows a container of Mobil Delvac 1300 15w40 desiel engine oil being used as hydraluic fluid. I hope this is an error in editing. 15w40 engine oil should not be used on hydraulic pumps as the additives will damage internal seals and bearings and poses a fire risk. Mobil Does make a Delvac hydraulic oil, Delvac 15w40 is not it.
I showed the wrong container. Sorry
So, pretty typical for a Chinese assembly. The thumb losing pressure is a major disappointment. Could be a leaky piston seal inside of the ram?
It could be. I haven't opened it up yet.
I checked the price of hydraulic oil in China and found that 16L is priced between $18 and $32 based on different grades
Thanks
6:14 its a weak pump
Thanks
The thumb is bleeding off internally on a valve, and you are correct the hydraulic system isn’t strong enough to do multiple things
Thank you!
Yes, the thumb is bypassing on a valve and the tracking issue might be related to valving also.
@@phatboizbackyardkustomz9006 thank you.
@@phatboizbackyardkustomz9006 ENGINE OIL in the hydraulics!!!!!! ( 1:00 min in )
Not gonna lie, your observations are minor gripes. I'd buy it and give it a good torque, before use.
*The creeping is a check valve, oring, more than likely.
*The dual comtrol, is a flow by issue, that would be a nuisance, but it still work.
* The heat is because of the design, look at Fire Wall Material and thatd take the heat off the cab. But being CHY-NAH, have a fire extinguisher mounted on it, for quick grab.
Should see the condition of full size equipment, after use.
I agree. All minor, but I want people to see exactly what to expect. I freaking love this thing!
Thumb maybe passes by the the orientation valve (not sure how you call it)
True.
Do these Chinese mini excavators have good manuals to help you with repairs, finding compatible spare parts?
Absolutely. I have found everything locally.
Grease fitting on the thumb maybe be like that so it doesnt get messed up when grabbing material.
Also your cylinder maybe leaking pass the seals on the end of the rod. Wouldn't be surprised if the cut one while assembling it.
Wanted to say the same about the cylinder seals. When you are 100% sure that there are no leaks anywhere, then it's most likely, bc I don't think that even chinese mess up the valve block. Possible, but since you already had one damaged seal from the factory assembly, it doesn't take much to make a little nick into the pressure seal when installing the cylinder rod. It shouldn't be an expencive fix when you can get it open by yourself, but it is quite messy and have to top off hydraulic fluid after (again).
Thanks
Thanks
Great video!
Thanks!
Did you keep the receipt?
In hand
I wonder how many kids it took to put this thing together? In all seriousness, the cheap stuff like this is perfect for those of us who don't have 100,000 to spend on a new or used name brand machine. But with the cost savings comes a bit of diy repair and tlc. There's no quality control in the factories, the quality control is you! The end user.
That is what I have discovered.
@@einarmikkelsenPNW Yes sir! I bought a brand new eBay Chinese diesel engine that I'm going to pull apart, inspect , do my little diy quality control and put it to good use.
@@cadenswain158 the diesel motor on this one is actually a Yanmar, so it is high quality and EPA certified.
@@einarmikkelsenPNW I've heard of Yanmar. They do make good engines. I was actually looking for a Yanmar 10 horsepower with electric start for a go-kart that I'm building. It was about a thousand US dollars, but I seen a Yanmar 6hp knock off diesel engine for 200 bucks before tax new on eBay and snagged it up. I think it'll be interesting to see how it does. Of course its not EPA certified or anything, but I don't mind for what its being used for.
@@cadenswain158 depending on where you are importing it to, you will need one that has a certain clean running certification.
stupid question, you should a bucket of motor oil, not hydraulic fluid. did it really get recommended to you?
i'd be running AW46
I showed the wrong bucket in the video by accident 😁
Alot of them run 10-30 engine oil.
Thanks
Welcome
Good follow up video
Thanks!
the thumb ram is i 5:52 n your hydraulic vave
Thanks
Thanks
I sold Terex mining equipment for 3 years and Case equipment for 26 years. One important thing to remember when buying construction equipment, good equipment is not cheap and cheap equipment is not good!
I get that. This isn't for general construction. It is just for me on my property.
The hydraulic issue why you got to keep putting pressure on every so often is because the hydraulic is leaking back inside the hydraulic cylinder the seal is not holding pressure and allowing the hydraulic to leak back
Thank you. Another bad o-ring...
ENGINE OIL in the hydraulics!!!!!! ( 1:00 min in )
Yea that’s not hydraulic oil dude. There’s your problem
@@calspaugh8078 I know that the can in the video is engine oil. I picked up the wrong one for the video. They look similar, but the hydraulic fluid used is regular hydraulic fluid.
So, I don't want to be one to defend a chinese manufacturer over better brands, but all these problems are pretty minor in my opinion. In my 15 years as a heavy duty mechanic, I've seen far worse manufacturer's defects from Cat, John Deere and the like, but I guess the difference is service (depending on your local dealer).
The bad o-ring is a pretty common one, they often get overtorqued and ripped, or undertorqued and prolapse. The window is pretty bad, that should never happen. Track motor valves being out of sync is also pretty common, and is something that periodically needs to be adjusted. I've seen the bad weatherstrip adhesive quite a bit too, a lot on Kenworths. The light switch is kind of funny, but what I would do is bypass it for power to the other accessories, and then use that switch to run a nice LED light bar. The thumb creep is not bad at all, most cylinders even when new have a little bit of creep from internal bypass, the seal is rarely perfect. You shouldn't be suspending loads for any long period of time from the boom, it's unsafe. I've never ran a mini hoe where you can use boom functions while walking the tracks. Most machine cabs without AC get pretty hot, my guess though is that it's intentional to use engine heat to heat the cab, instead of installing a proper HVAC system. You will probably be grateful for it when it get colder. The thumb grease fitting is that way because if you put a regular zerk on, it would break off very quickly due to it's location.
I don't know what you paid for this thing, but I'm actually pretty impressed.
Thank you for the amazing feedback. I am super happy with the machine. I think the total cost was about $17k, but another $9k in import taxes and shipping-related fees. I have an Excel sheet on it in this video:
ua-cam.com/video/jfaxFafO8uc/v-deo.htmlsi=7t6GM3Y4o2Y_ER0O
do you have a video with the excavator in action?
I am going to put together one shortly. I have to dig a sewer line.
How loud is your digger? My brother bought 1 and with a diesel single cylinder engine it is LOUD. There is also no room to upgade the exhaust, either.
It isn't very loud. It has a Yanmar engine
Sounds like hydraulic actuator causing all your hydraulic problems. Orings have been trash so far and probably holds true throughout. Actuator orings probly letting fluid slowly drain back. That grease fitting can be replaced in 30 seconds long as you don't break it.
Thanks
Why use 15-40 motor oil for hydraulic fluid?
Cheap hydraulic fluid would work for it.
I showed the wrong container in the video by accident.
I was just watching the same thing and rubbing my eyes - did you just add motor oil to the hydraulic tank :D :D
@@JaanKaer yeah no. Actual hydraulic fluid onboard. Just the wrong container in the video
I have a 1ton hightop ht10b. Paid 11,500 after taxes. If i had bought in Kubota in the same size would cost 22,000.
So if you buy cheaper unit you will have to fix some thing.
As far as the thum blending off. It may be cylinder in side.
I'll take the thumb apart to inspect and let you all know when the problem is.
ENGINE OIL in the hydraulics!!!!!! ( 1:00 min in )
@chrishanson9542 who put engine oil in the hydraulic
@@jtsokiehobbyandadventures6666 @einarmikkelsenPNW did. he showes the oil he is using and it motor oil.
@chrishanson9542 sorry didn't pay attention to that. But you are righr
You showed engine oil when talking about the hydraulic fluid. I hope that was an editing mistake. If you mixed engine oil into your hydraulic system you will have bigger issues soon.
You are right. I accidentally showed the wrong container.
While you,re tracking & you use another function and direction changes. That is normal it has 2 hyd pumps it may look like one hyd pump but its 2 so whlie tracking each one of the pumps supplies oil to each track seperately equal amounts. All the other functions are cotroled by either one of the pumps. So while tracking & you use one of the other functions it takes oil from one of the pumps so that will slow down one or the other track drive. As far as the thumb cylinder losing pressure thats either the piston seals in the cylinder bypassing oil (leaking internaly) or just low quality control valves leaking internaly. Just remember aĺl hydraulic control valves leak internaly as in the wont hold pressure forever. How fast they leak down has a lot to do with the quality of the hydraulic valves.
Got it. Thanks.
you replaced the hydraulic fluid with diesel engine oil? am I missing something here?
No. I showed the wrong container. Sorry
This is a standard Chinese built-for the home market machine....The manufacturers' belligerent attitude throughout China is ''Well it worked perfectly well when it left the factory...!!! This is your problem now...!!!'' There's a world of difference between products manufactured for the Chinese home market & for export.
That makes sense.
If you change greasing nipples on the thumb to regular ones, it will for sure break at some point, cause it is pointing out and will catch on someting...
Okay, but that isn't an issue on any of the other ones?
Other nipples are not in the area which is in direct contact with materials that will be handled or are in enclosed area, which prevents most of the possible cases where they can break...
@@marioivkovcic3253 I get it now
What is the weight?
3 ton
Is there aircondishoner in this cabin？
No. Just a fan.