Chipper JINMA Chipper Revisited

[Skaning]

The original Jima Thread was very actve about 6 months or so ago. Several folks bought them as I remember from various sources. Now hat the first flush is over, I was wondering what the current opinon is about the unit.

I'm looking for a chipper, my tractor is probably marginal for the Jinma 6, but still, I am looking for comments.

TIA

 

[Slippy]

Still impressed. I have used it many hrs now and other than making sure everything was tight when I got it no real problems. I did get it jambed once by putting in a log that was dead and real soft. I wedged between the fly wheel and the shroud. Won't do that again. Otherwise, been very happy. Run it mostly on 40hp tractor.

 

[Ed_Indiana]

Am very satisfied. After the recommended maintenance from members of this discussion board I have put a lot of 2 inch too 6 inch limbs through the chipper and not had a problem. My B7800 has performed great with only a minimum loss of RPM on the larger & longer limbs. Ear & eye protection are a must.

 

[moeh1]

Still happy with mine. It is all the weight I ever want to carry on the 3 point, but I don't have any horsepower issues like I feared I might - but I still try to chip only smaller than 4"

 

[Kays Supply]

I have had the same results as all the others. I did the usual checks. I don't use it often, but it has done a great job. I origanally had it on a 30+ hp tractor and now on a 24hp. It will drop afew rpm , but it still will " Git er done"

 

[Propertymaint]

Had mine for two years now and use it for my property maintenance business. I don't do a lot of tree work, about 6 to 10 jobs a year so far with 3 to 4 trees per job. The chipper works great for the money. It was a good alternative for someone like me who doesn't chip everyday but has one on hand when needed. The only improvement I would like to see Jinma develop is a double feed roller system. Just remember for the smaller tractors these units weigh about 900 Lbs. On another note, one of the Jinma dealers is working with the factory on developing a PTO stump grinder. May also be a good alternative for the occasional user. It is 'still in the development stage. I'm sure someone will post something when they become available.

 

[Slippy]

Stump grinder hu. That sounds dangerous.

 

[SPYDERLK]

I have had mine a little less than a year and have made about 1000 bushels of chips. When I 1st got it I read about some problems with the feed drive and made preventative mods to improve its lubrication - - successful to date. Last week the anvil, against which the wheel knives shear the chips, cracked off and was ingested. The carnage does not appear terminal, but the failure is alerting since I am positive the bolts were tight. I would say that regular inspection of the anvil is prudent. Mine shows that the crack existed for awhile before failure. When I replace it I will be sure to blend the edges of the countersunk boltholes to eliminate stress risers. I will also use a loctite compound when mating the anvil to its seat so that it is supported uniformly.

As for performance, I find that the belts must be very tight to transmit the 70HP necessary to chip 6" logs. The Mahindra 7520 holds within 500rpm but the chipper slows a lot owing to belt slip. Best to keep the big ones less than 6' long or youre in danger of stopping the chipper or the tractor or both.
Larry

 

[GuglioLS]

I've had my Jinma chipper for almost 2 years and use it allot on 3" dia & below. If I had to guess about 10~12 cubic yards of chips so far. I lube the bearings, PTO shaft U joint's, & feed roller drive before each use. When done using it I blow out all the dust & left over chips, I keep it outside covered with a canvas tarp. The belts are holding up pretty good - I am supprised - No parts needed to date. The cutting blades & anvil are still in very good condition. I installed a foot actuated bar to lift the feed roller in order to stuff in the gnarly branches. I use it on a 35 HP tractor and have stuffed in a couple of ~5" logs just for fun. It ate them, the tractor felt it though.The improvements I would like to see on it would be more agressive feed roller teeth that grab the wood a little better. When the feed roller teeth were new it grabbed the branches pretty good. Now that it's been used quite a bit I think the feed roller teeth on it are a little worn now. I may weld on some carbide teeth to it some day. Another wish it had item would be a 180* rotating discharge chute. (another future DIY mod)

For individual home use & the money I think it's a very good bargain.

Larry

 

[newlife]

I love mine. I have had it for 18 months now. It has about 20 hours on it. I did all the tighten and lube stuff that all the TBNers recommened. I burned out the belt for the feeder during the first 5 hours and replaced it with a good Gates belt, and put new oil in the gearbox. I one thing I need to do is move the infeed chute over, it is too close to the center of the flywheel, where the knives aren't.