markie61
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Chipper Chinese Chipper Review
- Thread starter DIYGuy
- Start date
- Views: 25856
markie61
Veteran Member
- Joined
- Mar 31, 2001
- Messages
- 1,362
- Location
- Northern Virginia
- Tractor
- 2019 Rural King RK55HC with Loader & Backhoe; 2001 New Holland TC40D with Loader
I've been using my Jinma chipper for about 8 months now and found it to be a very useful tool if you don't expect it to do the work of an industrial unit.
I've found a few mechanical issues that need to be addressed by the factory.
1) The feeder drum has dull teeth, as a result it often feeds poorly. It slips on irregularly shapped wood. As a result, the user has to pull twist and refeed some limbs to get them to feed. I believe having dull teeth creates a bit of a safety hazard.
2) The jack shaft coupler slips off the shaft and the shaft disconnects it's self. The feeder drum bearings have a Allen head screw which is to hold the bearing to the shaft. There are no detents in the shaft to hold the screws so, after a time, the support arms spread out pushing the jack shaft coupler off the end of ths shaft. I had to disassemble the feeder drum assembly and drill detents on the shaft. This fixed the problem. This is a bit of a headache.
3) There is a small pulley on the end of the flywheel shaft. This pulley drives the gear reduction unit for the feeder drum. The hole through which the flywheel shaft passes is too large. This allows a build up of bark and wood strips to wrap around the shaft, walk through the opening and build up behind the pulley. Eventually this pushes the pulley off the end of the shaft. Before this happens, it creates a belt misalignment which shreds the belt.
4) When the chipper is not mounted on the tractor and is sitting on the ground, it's unstable and can easily tip towards the feeder chute. At 800 pounds, having this thing unexpectedly tip over on you would not be a pleasant experience. I mounted a set of support arms on the base of the chipper and now it's stable on soft or uneven ground.
As I said, the chipper is a useful unit but it needs a little redesign work. It's not an industrial capacity chipper but will do lots of small work.
Basically, it's perfect for the person who burns wood. Everything it won't chip is big enough to burn in the wood stove.
I've found a few mechanical issues that need to be addressed by the factory.
1) The feeder drum has dull teeth, as a result it often feeds poorly. It slips on irregularly shapped wood. As a result, the user has to pull twist and refeed some limbs to get them to feed. I believe having dull teeth creates a bit of a safety hazard.
2) The jack shaft coupler slips off the shaft and the shaft disconnects it's self. The feeder drum bearings have a Allen head screw which is to hold the bearing to the shaft. There are no detents in the shaft to hold the screws so, after a time, the support arms spread out pushing the jack shaft coupler off the end of ths shaft. I had to disassemble the feeder drum assembly and drill detents on the shaft. This fixed the problem. This is a bit of a headache.
3) There is a small pulley on the end of the flywheel shaft. This pulley drives the gear reduction unit for the feeder drum. The hole through which the flywheel shaft passes is too large. This allows a build up of bark and wood strips to wrap around the shaft, walk through the opening and build up behind the pulley. Eventually this pushes the pulley off the end of the shaft. Before this happens, it creates a belt misalignment which shreds the belt.
4) When the chipper is not mounted on the tractor and is sitting on the ground, it's unstable and can easily tip towards the feeder chute. At 800 pounds, having this thing unexpectedly tip over on you would not be a pleasant experience. I mounted a set of support arms on the base of the chipper and now it's stable on soft or uneven ground.
As I said, the chipper is a useful unit but it needs a little redesign work. It's not an industrial capacity chipper but will do lots of small work.
Basically, it's perfect for the person who burns wood. Everything it won't chip is big enough to burn in the wood stove.
inveresk
Platinum Member
That's a useful posting, Truchaos. I was on the point of investing in a Jinma 6 chipper. We're clearing an acre and a half or thereby of woodland for a new barn and to relocate our house. From what you say, I'm thinking the Jinma will not be robust enough for the large quantity of material we will have to process but I'd be interested in your view. We'll have a lot to do quickly after the felling then the chipper will be on lighter duties. Am I right in thinking for the heavy work we'd be best to get something with less design problems?
rswyan
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</font><font color="blue" class="small">( We'll have a lot to do quickly after the felling )</font>
I see this as the major obstacle (alot to do quickly) ..... I just cleared a 100' x 100' area of dense woods and chipped the brush with my Jinma (Farm Pro)
I have maybe 20 hours on it ... in that time I had to 1. replace the belt for the feed roller drive (wood shavings coming thru the hole popped it off the pulley and it shredded), readjust/retighten the bearings for the feed roller (they loosened and the feed roller shaft got pushed too far to one side), need to replace the outboard ball and socket joint for the feed roller drive shaft, which has ground itself down and will no longer drive the feed roller. I still haven't got around to doing the last item, but it should be a fairly easy fix (if you weld)
The chipper is a great value for the price (around $1600 or so) - but it does come with a few minor imperfections which will have to be addressed. It is, overall a very heavy-duty piece of gear.
If you are mechanically inclined and have a bit of time and the facilities then it's a good deal. The fact is to get something close in it's capabilities you are probably looking at $4K to $5K at least, maybe more. But if you need to do "alot quickly" then maybe that's money well spent. If I had it to do over again I'd still buy it.
I see this as the major obstacle (alot to do quickly) ..... I just cleared a 100' x 100' area of dense woods and chipped the brush with my Jinma (Farm Pro)
I have maybe 20 hours on it ... in that time I had to 1. replace the belt for the feed roller drive (wood shavings coming thru the hole popped it off the pulley and it shredded), readjust/retighten the bearings for the feed roller (they loosened and the feed roller shaft got pushed too far to one side), need to replace the outboard ball and socket joint for the feed roller drive shaft, which has ground itself down and will no longer drive the feed roller. I still haven't got around to doing the last item, but it should be a fairly easy fix (if you weld)
The chipper is a great value for the price (around $1600 or so) - but it does come with a few minor imperfections which will have to be addressed. It is, overall a very heavy-duty piece of gear.
If you are mechanically inclined and have a bit of time and the facilities then it's a good deal. The fact is to get something close in it's capabilities you are probably looking at $4K to $5K at least, maybe more. But if you need to do "alot quickly" then maybe that's money well spent. If I had it to do over again I'd still buy it.
CTyler
Veteran Member
I bought mine last summer and have chipped a lot of yards of mulch. Chipped another 3+yards just last week. I have not had any of the problems you guys are listing.
The feed roller belt has popped off before but only because the roller got jambed up and stopped. I'm assuming the belt starts hopping and pops off after bit. I'm still running all the original belts as well.
It also stays well lubed and dont see any signs of wear on the knuckles or anything coming loose. When getting the chipper I took extra time and went over all the nuts and bolts etc.. Perhaps I just got a good one, maintained it better from the start or not using to capacity 90% of the time. Most stuff is 3" or less.
As far as the dull drum teeth, yea they are dull. I had considered sharpening them but figured it would just add stress in the knuckle. Don't see how this could be a safety hazard. Can't imagine anyone being dumb enough to reach into a running chipper. Use another stick/branch to push it if its in that far. Lift the roller and pull it out if its out past the chute, otherwise turn it off.
The feed roller belt has popped off before but only because the roller got jambed up and stopped. I'm assuming the belt starts hopping and pops off after bit. I'm still running all the original belts as well.
It also stays well lubed and dont see any signs of wear on the knuckles or anything coming loose. When getting the chipper I took extra time and went over all the nuts and bolts etc.. Perhaps I just got a good one, maintained it better from the start or not using to capacity 90% of the time. Most stuff is 3" or less.
As far as the dull drum teeth, yea they are dull. I had considered sharpening them but figured it would just add stress in the knuckle. Don't see how this could be a safety hazard. Can't imagine anyone being dumb enough to reach into a running chipper. Use another stick/branch to push it if its in that far. Lift the roller and pull it out if its out past the chute, otherwise turn it off.
inveresk
Platinum Member
Sounds like the machine is good value despite it's shortcomings and, as has been pointed out, the home grown competition is very much more expensive. I'll likely still go for it but carry out the upgrades recommended on TBN before I put it to work.
Slippy
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Looking for up date from you folks who bought the Jinman 006. Still like them? Having any more problems? Did Gary ever help with the shaft problem? Has there been a change from the factor? Thanks.
Steve_Taylor
New member
I bought mine early this year. I've put about 15-20 hours on it and it has work great! I have not had any problems with it. I just took it off my tractor and put it in the shop. I am planning on going though a good servicing prior to using it again next spring. Specifically, I want to check out the feed roller drive system to see how it is holding up. I suppose I should replace the drive belt while I've got it apart just as a precautionary step.