Importing and modifying a new mini excavator from China

[D'oh]

But the Intermediate Plate, doesn't make any sense? Why is it just Capped Off? 1 Inlet, 1 Outlet won't increase Flow unless the first stage is acting like a suction pump to feed the pressure side, like it's an Open System.

Lumi builds them both ways, Single and Stacked but 2 Outlets Lumi gear motors

 

[Rich B1]

An unloaded pump has 2 gear sections. At low pressure, both gear sections supply oil. At a preset pressure, the unloaded valve opens and dumps one section.

 

[dfkrug]

But the Intermediate Plate, doesn't make any sense? Why is it just Capped Off? 1 Inlet, 1 Outlet won't increase Flow unless the first stage is acting like a suction pump to feed the pressure side, like it's an Open System.

The intermediate plate between the two pump sections has a cap that covers a "load-sensing" valve. At a certain pressure, one section of the pump is shut off by routing oil from the outlet back into its internal inlet. A 2-stage log splitter valve.

 

[Mldsr5]

Yes, it looks like the pump may have an RV on the center section (unloader valve). I should have taken it off to see what it is.

In operation of the excavator, I was looking for signs of a 2-stage pump with internal RV. Could not detect that it behaved like it had one. I would have expected that the flow rate would have been higher when moving a given cylinder until it met resistance. Then it would slow down. I did not experience that behavior.

I did notice that the machine exhibited signs of low main RV setting, which I adjusted. Pix are next.

I‘m new at this. I purchased the diggit em15 at auction recently. What are the signs of low main RV setting?

Also, I found that rustoleum 2x ultra cover in marigold is an almost perfect match for this mini x.

Mark

 

[D'oh]

Welcome to the discussion Mid.

Together we can keep these things running!

Heat seems to be the Major Obstacle Any thing you can do to get the Hot Out, and Cool Air in helps.

 

[dfkrug]

I‘m new at this. I purchased the diggit em15 at auction recently. What are the signs of low main RV setting?

Congrats on the buy, Mark. What was your total cost, including all fees and taxes? And where?

Most of these units are set way too low at the factory and they do minimal, if any testing and QA.

When I opened up and inspected the EM15 last week, I failed to bring my gauges, which I use to test the relief pressure at the AUX hose. I have fittings for the 2 different sizes I need to connect there. I suggest you get a gauge and fittings to make this test. 2500psi is the target.

So, just going by my experience, I should be able to embed the bucket about halfway in the dirt and dig or drag the machine using just the dipper. Blade down and toward the front. I turned the RV adjuster clockwise until it did.

 

[dfkrug]

Reminder: please post your general location in your profile

 

[Mldsr5]

Congrats on the buy, Mark. What was your total cost, including all fees and taxes? And where?

Most of these units are set way too low at the factory and they do minimal, if any testing and QA.

When I opened up and inspected the EM15 last week, I failed to bring my gauges, which I use to test the relief pressure at the AUX hose. I have fittings for the 2 different sizes I need to connect there. I suggest you get a gauge and fittings to make this test. 2500psi is the target.

So, just going by my experience, I should be able to embed the bucket about halfway in the dirt and dig or drag the machine using just the dipper. Blade down and toward the front. I turned the RV adjuster clockwise until it did.

Thank you for the info on the pressure. I’d like to get everything out of it that I can.

I purchased it in Marysville,Wa
$5900 for the machine, another went for $5700.
3% auction fee and 9.4% sales tax.

Teeth vertical in the dirt, no curl?

 

[dfkrug]

Teeth vertical in the dirt, no curl?

Dig normally, so curl as you go. This is not the best way to estimate if the RV setting is correct. I have operated 6 different Chinese 1-ton-ish mini-Xs, from 4 different makers. I know what these can do.

Get a gauge.

 

[dfkrug]

I purchased it in Marysville,Wa
$5900 for the machine, another went for $5700.
3% auction fee and 9.4% sales tax.

So, under $7K total. Nice.

I assume yours is just like the one I posted about, with no counterweight and no hyd return filtration. Filtration is really really important. Even the cheapest log splitters sold usually have it.

 

[brandonb]

I'm interested in purchasing one of these units. For posterity sake, I'm sharing these details:

YFE10S (New design) 1 ton excavator. $2990
Unit will have swing boom (+$400), telescopic chassis (+$550), hydraulic thumb (+$150), quick hitch (+$90), 200mm bucket, 800mm bucket, raker (+$90), auger drill (+$330) with shipping to port $4,900usd. These prices are listed prices, have yet to negotiate anything.

The agent I'm working with says it comes with a hydraulic oil cooler and I can pick my color.

Assuming I increase this price by 50% for tax tariff and other fees; I should be driving away from the port with this unit for $7,350.

How does this sound to you all?

 

[TimberFarm]

The tariff is 25%.
How did you figure the total price?
The machine and all those attachments is $4600. $350 for shipping?

 

[brandonb]

The tariff is 25%.
How did you figure the total price?
The machine and all those attachments is $4600. $350 for shipping?

Yes, that is what the agent I'm working with through alibaba is telling me. I'm using 50% as a worst case scenario number. I'm glad to hear it should be less than that.

 

[Mldsr5]

So, under $7K total. Nice.

I assume yours is just like the one I posted about, with no counterweight and no hyd return filtration. Filtration is really really important. Even the cheapest log splitters sold usually have it.

I was very happy with the price.

Yes, mine is the same as your posted mini-x. I am wanting to add some weight to the back. Do you think I could add 3-400 lbs without trouble?

I am looking at screw on filter assemblies. They range from 10-30 microns or so. Any thoughts on the appropriate filter size? Also, I can’t find any information on the digget em15 hydraulic pump gpm rating. I’d love a ballpark number so that I can size the filter fairly close.

I found metric din fittings and adapters at discounthydraulichose.com, does anyone have a better source, their prices and selection seemed ok. Again, this is all new to me.

Im thinking about sharing some pictures as I go, I like to do little mods. Hopefully you all wouldn't mind. I have really enjoyed this thread and there is not much out there for the import mini-x’s. This is my version of a hot rod.

Thanks, Mark

 

[dfkrug]

I am looking at screw on filter assemblies. They range from 10-30 microns or so. Any thoughts on the appropriate filter size? Also, I can’t find any information on the digget em15 hydraulic pump gpm rating. I’d love a ballpark number so that I can size the filter fairly close.

SurplusCenter has a very good and inexpensive 10 micron hyd filter system. Look at my installation above. This should be top priority.

I would estimate the hyd pump is between 5 and 10 GPM at 3600 RPM.

If you find any info at all on the Diggit EM15, please share. I have not found anything, including which factory made it.

 

[ArlyA]

SurplusCenter has a very good and inexpensive 10 micron hyd filter system. Look at my installation above. This should be top priority.

I would estimate the hyd pump is between 5 and 10 GPM at 3600 RPM.

If you find any info at all on the Diggit EM15, please share. I have not found anything, including which factory made it.

SurplusCenter rocks!

 

[dfkrug]

YFE10S (New design) 1 ton excavator. $2990
Unit will have swing boom (+$400), telescopic chassis (+$550), hydraulic thumb (+$150), quick hitch (+$90), 200mm bucket, 800mm bucket, raker (+$90), auger drill (+$330) with shipping to port $4,900usd. These prices are listed prices, have yet to negotiate anything.

Note that some attachments are worth buying and others are not. I posted about them. Spares are very inexpensive if you include them. I don't know what the tariff is in other countries, but here in the US it is still 25%.

Big Qs you need to ask about the YFE10S is if it has oil filtration and what engine do you get. I would still go for the B&S gas over the ChangChai/Koop diesel, even if you are not in the US.

 

[Mldsr5]

SurplusCenter has a very good and inexpensive 10 micron hyd filter system. Look at my installation above. This should be top priority.

I would estimate the hyd pump is between 5 and 10 GPM at 3600 RPM.

If you find any info at all on the Diggit EM15, please share. I have not found anything, including which factory made it.

I have been looking for more information. There is not a lot. On the auction sites some list a 5.5’ dig depth, about 8.5’ dig height and 9’4” reach. For weight I found one auction site listing at “880 kg load capacity“ and another “GVWR 2425 lbs”.

 

[D'oh]

I would second Filtration, and Hydraulic Cooling if I had to do it over again.

Not sure what the "S" suffix means, but it looks like SHANDONG INFRONT shares the Model Number
Year
2023
Manufacturer
SHANDONG INFRONT MACHINERY CO LTD
Model
YFE10

2023 SHANDONG INFRONT MACHINERY CO LTD YFE10 For Sale in Grants Pass, Oregon

2023 SHANDONG INFRONT MACHINERY CO LTD YFE10 For Sale in Grants Pass, Oregon at MachineryTrader.com

www.machinerytrader.com

 

[Fredrik]

Just a note on this installation. The outlet line should be looped over the top of the cooler. Or the inlet and outlet mounted to one side with the outlet on top. Otherwise the oil takes the path of least resistance and possibly the cooler never runs full of oil.

It does make sense that the cooler should look more like a radiator with top and bottom inlet/outlet configuration.
From what i can tell all the small coolers are arranged like mine.
The coolers are small ( 11" x 12" ) and the plates are less than an 1/8" thick Od. I was more afraid that the interior volume was insufficient.
The volume of added oil was 20 oz. My oil temp went from 58c to 35c .
All this being said, if there was room to turn the cooler on it's side thus working more like a traditional radiator I would have done that.
The problem with this is the very limited room. you need to be able to access the inside of the dog house and running hoses that don"t become pinched , collapsed ,or fried by the engine or exhaust becomes a challenge.
None the less pmsmechanic you are correct.