Chipper Jinma Chipper Self Destruct

[Smalljobs]

Here's the back side of the flywheel. I'd like to find a way to fix it. Since I bought it factory direct I'm trying to get a price for the flywheel alone and ship it back with some other things.

 

[LD48750]

Jinma Wood Chipper Parts | Jinma Woodchippers | Circle G Tractor Parts

 

[Smalljobs]

Thanks. I know where to buy the flywheel but I'm not ready to buy one if I can repair it or find another way.

 

[aczlan]

Thanks. I know where to buy the flywheel but I'm not ready to buy one if I can repair it or find another way.

That looks almost like it is cast, if it's cast iron you will have a very hard time welding it, let alone welding it and then getting it balanced again.
If it is cast steel, that is easier to weld but you will probably still have to figure out how to get the whole thing rebalanced afterwards.
Either way, you're probably going to have to get the whole thing up to 400 degrees or so before you start to weld it and then keep it warm so the whole thing can slowly come down together in temperature.
If you don't do that then the piece that you weld back on will just break right off.

Aaron Z

 

[Smalljobs]

Thanks Aaron. It's cast and I'm familiar with the weld repair problems. It just won't be worth it because of the danger of it failing, or just plain warping the flywheel and creating a new problem.

I think eventually I'll have to buy another flywheel. We've been importing custom machined parts, 12VDC wire harnesses, and hydraulics for many years from China so my first step is to see if it makes sense to just import another flywheel or to import a couple of chippers and sell one, while keeping the other one for myself. By starting over with another one, I can keep the existing one for spare parts but I already have spare bearings, gearbox, in-feed roller, etc.

 

[mikester]

Does anybody use a slip clutch to prevent tractor damage from incidents like this? I hate the idea of damaging an expensive tractor because of a cheapo chinesium chipper self destructing.

 

[Smalljobs]

Does anybody use a slip clutch to prevent tractor damage from incidents like this? I hate the idea of damaging an expensive tractor because of a cheapo chinesium chipper self destructing.

I doubt a slip clutch would have made a difference. Once something fails, the flywheel momentum will just keep it going. Once the blade failed, the flywheel just coasted to a stop after I shut the machine down and disengaged the PTO.

I've found this China chipper to be of high value after using it for hundreds of hours with no issues. It's been reliable and easy to maintain. At this point I'm pretty sure a stone cracked a cutting knife last year and led to the recent failure. It reminds me of the new factory issued small block Chevy 350 crate motor I bought from a GM dealer. After 26,000 easy miles, a rod bearing let go and the motor self destructed and cracked the block.

Maybe it was made of "cheapo gmnesium" or else "cheapo Chevrolite".

 

[LD48750]

Does anybody use a slip clutch to prevent tractor damage from incidents like this? I hate the idea of damaging an expensive tractor because of a cheapo chinesium chipper self destructing.

No, not on either of my tractors.
My brushog is harder on the tractors then the chipper & it doesn't have one either.

 

[grsthegreat]

I have a slip clutch on my tractor.... since unit was new. I consider it very cheap insurance.

 

[Smalljobs]

We're really getting hammered with high winds plus COVID 19. A huge tree fell down today along with limbs all over the place. Just ordered a new flywheel from Circle. My Jinma 284 now has over 700 trouble free hours and will be really helpful to move this tree, especially with the BH and thumb.