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Chinese Mini Excavator Hydraulic Controls Explained (Pilot System + Relief Valve)

The Garage Connection

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Hydraulic Test Kit: https://amzn.to/4hmoLER

Is your diesel chinese mini excavator pressure relief set up effectively? Find out how to check and fix it with this video!

In this video, I explain how the pressure relief valve and pilot control system work on a Chinese mini excavator. Understanding these hydraulic components is critical for diagnosing slow operation, weak digging power, jerky controls, and other hydraulic performance issues.

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20 Comments

@thegarageconnection Creator 2 months ago Pinned

Order Test Kit: https://amzn.to/4hmoLER

@stratcom9338 4 hours ago

Useful explanation without a lot of useless filler. Thank you!

@inhabor1 1 month ago

You definitely have a gift for teaching. Excellent explanation. Thank you.

@markc-jb2kt 5 days ago

Thank you, this will help. I have a 18b. Explains it well. Thanks again.

@Chrisk45k 1 month ago

After watching your video, several times, I set the pilot control to 400 lbs. and the main pressure to 2600. Very happy with the results. I've got 64 hours on my HY16C now. I did the 50 hour inspection and changed out the engine oil. I see the manual says to change the hydraulic fluid at 2000 hours but I'm going to change that out now and also clean the suction filter inside the tank and the pilot filter. I just think it's a good idea to get all that break-in debris out of there. Great information in all your videos.

@justdoityourself7134 2 months ago

Day care not a bad idea, kids love mini excavators.

@ShaneWatson-d9l 2 months ago

Well done Cam, process explained thoroughly as usual, you are clearly a well trained tradesman.

@justinstripe3437 1 month ago

TY, TY, TY. I LEARM SO much from you. Cam is still the BOSS.

@EK10241024 2 months ago

Cam, this was very informative for me. By the time, I've viewed this on three different machines, it will be engrained into this thick skull of mine. Pressure relif valve adjustment..... got it. This is what I love about your channel - practical learning for those of us who aren't mechanics or hydraulics pros. Thanks. PS, the Derette V1000s are so close to the panama canal. I wish my 3 full containers were as close. We will get together again soon!

@billbuesseler6597 2 months ago

Thanks for sharing your knowledge- super helpful.

@withoutprejudice8301 2 months ago

This tutorial came at the perfect time. I had that same test kit delivered last week and was wondering where i was going to get info on how/where to use.
The Garage Connection is a great informational source for those of us trying to figure out our Chinese bargins and to actually LEARN things regarding hydraulic systems.

@ningenix3 2 months ago

Great video. Thanks for sharing your knowledge

@mlimey 1 month ago

Excellent video, thanks for taking your time to explain how to adjust etc.

@Acme-s8z 1 month ago

Just bought a mini from Cam. Very helpful. Good unit

@AM-dn4lk 2 months ago

Bro, you are an excellent teacher. Thank you for this video.

@JJM935 1 month ago

I appreciate your time and information. Great help for me.

@normhowes2975 2 months ago

Thanks for the video. Getting the kit sure is cheaper than bringing my unit all the way down to you. Now just have to get the kit and get MY hands dirty.

@larsydreskog4811 2 months ago

Thanks for a great video, really pedagogical. I have the pressure kit and adjusted main pressure but need to fix the pilot pressure to get it smoother. Better to understand than complaining.

@PlayscBricks 1 month ago

Great Video and thanks for the very clear explanations. I did find another pressure test kit by Aikyciu that is 100% identical to yours for only $130.