Importing and modifying a new mini excavator from China

[dfkrug]

I've got about 45 hours on my mini now and my only complaint is retightening every bolt before use.

Which bolts are loosening? I don't have that problem at all.

As for buckets, even a 20-incher is going to experience high torques with such a thin carcass. And they only have 25mm main pivot pins. Sadly, most of the makers do not mask off the pivot holes when they paint them, so they need to be sanded out for the pins to go in.

Glad you got he heat issue managed, Fredrik.

 

[Fredrik]

Which bolts are loosening? I don't have that problem at all.

Last week the bolts holding the ring gear in place got so loose that the upper section almost came loose from the track assembly.

 

[MattB4]

It is rather interesting how alike but different some of these 1-tons are. I am noticing several things as I review other peoples models vs mine. I have not found any loose bolts with the exception of a seat bolt had come free during shipping. Perhaps with more run time (only at 7.5hrs) it will become noticeable.

 

[dfkrug]

Last week the bolts holding the ring gear in place got so loose that the upper section almost came loose from the track assembly.

Wow, never heard of that in my 5+ years of involvement with Chinese minis. I have hands-on with units made in 6 different factories; 5 if you exclude Sany.

I will go check mine. Thanks for posting.

 

[scsever]

Hi all,
I'm a new member today. I found the forum after extensive searching for a solution to my AGT ignition problem. Besides the mini excavator I have a Bobcat tractor loader with a tiller, tooth box scraper, rake, and PTO chipper. For lawn work I have a Hustler Raptor SD-60, Cub LT 1046, and a National 84".
So, back to my ignition issue. I purchased the AGT H12 this summer in an auction, image attached showing mine on the left. The electric start did not work when I went to pick it up, fortunately they have a recoil start. I got some of my initial projects done and decided it was time to work on the ignition switch, it's an Xoingda with 6 solder terminals. What I believe is the solenoid wire was rusted off the switch and I could see there was no hope of repairing it. I ordered one off ebay and wired it exactly the same as the old one, it will turn over, but won't start, I've confirmed that I don't have a spark at the plug. I realize after reading all 67 pages in this thread that I should really replace the ignition switch, but for now I'd just like to move it our of the way of my overhead shop door.
Lights work, starter cranks, but no spark. It's the Briggs XR 13.5, I've tried disconnecting the oil level sensor. I noticed there are two wires going into the engine case, I believe one is for the ignition coil (ground to kill?) there's another wire along with it that was never connected, not sure what that is. That's one's in the bundle of my other image attached.
I apologize in advance for my lengthy first post.

Any help would be greatly appreciated!
Steve

 

[MattB4]

Not sure if I can help but B&S engines kill by grounding out the spark. You having no spark would indicate that the contact from the ignition switch in On that opens the grounding wire is not happening.

 

[dfkrug]

I got some of my initial projects done and decided it was time to work on the ignition switch, it's an Xoingda with 6 solder terminals. What I believe is the solenoid wire was rusted off the switch and I could see there was no hope of repairing it. I ordered one off ebay and wired it exactly the same as the old one, it will turn over, but won't start, I've confirmed that I don't have a spark at the plug. I realize after reading all 67 pages in this thread that I should really replace the ignition switch, but for now I'd just like to move it our of the way of my overhead shop door.

Welcome to TBN, Steve

If you go back to page 160 of this long thread, I have posted my replacement wiring diagram.

I don't know what they are using for an ignition switch in your unit, but the replacements I have used in the 3 units I have rewired has the logic of a riding mower switch. You will need to figure out the logic of your switch and trace the wiring to see why the ignition seems to be grounded when you are trying to run the starter motor.

Update:
The switches I used were STENS 430-706 ($20), which is a 5-terminal riding mower ignition switch. I see the AgroTK website sells replacement switches ($45!) that are only 4-terminal units.

 

[scsever]

Looks like I've got a bad ignition coil. According to my research, although not directly from B&S, the coil resistance should be 2K-5K, mine was 11.6K. I ordered a new coil and the Sterns switch from Amazon. I hope my coil diagnosis is correct.
It's going to be a few days, but I'll reply when I get it back together.

Thanks guys.

 

[MattB4]

I notice that there is another price drop. They are now selling the Typhon (with hydraulic thumb) for $5750 plus free US delivery. Getting to be a race to the bottom amongst the importers. I would hate to be one of those folks/companies that imported earlier this year or last year for resale and are sitting with mini excavators that they are wanting $9-10k for.

Market saturation I guess.

 

[Fredrik]

Market saturation I guess.

Yep , looks like the bubble has burst . I'm waiting for the 2 tons to get below 8 grand and I"ll pull the trigger. Might not have to wait too long.