Chipper Chinesse chipper woes

[iwanta]

Some brief back story, you cant get a Chinese chipper here in Tasmania Australia, no agents,so I had to purchase my Jinma chipper from a dealer some 1500 miles away[$3461 USD +$338 USD freight, and that's the very cheapest you will find them here in Australia, we get ripped off big time, but I digress] so it was freighted to me unassembled in the crated just as they come from China. No big deal to put together and I had that done in a few hours, give it a dry test run, all good so started running branches up to 2 inch's threw, worked great for about 30 minutes then the feed roller stopped feeding, shut it down straight away, removed the guard that covers the gearbox and found the 1/2 inch square drive on the outer dog clutch had sheared off. 3 months waiting for it to arrive, 30 minutes to have it break, doesn't fill me with confidence about the quality I just spent $3800 odd on. Ive searched here to see if this is a common fault but no one has mentioned it that I can find, must just be mine, the metal has visible flaws which would make it weaker but looking at the feed drive line I would have thought 1/2 inch square drive would be under sized to handle the supposed 6 inch capacity, the dealer is replacing the outer dog clutch but I'm not confident this wont keep happening.
Ive read here repeatedly about needing to be properly set up, the manual only says put on the base and discharge shute, no mention of other adjustments so any in put would be great, also the manual shows 2 springs to hold down the drive roller, mine arrived with only 1 fitted to the right side, I phoned the dealer and he told me they only use the 1 spring now as 2 springs put too much tension on the feed roller, any comments about this, I was wondering if that had caused the problem by allowing the drive side of the feed roller to kick up disproportionately to the other side that was spring tensioned.
Seems people here are very happy with their Jinma chippers so with luck it was a 1 off and the new part will solve all my woes but I dont relly beleive it will, any coments on what may have caused this and how it avoid a repeat would be great.

 

[beenthere]

Sorry to hear of its short working life.
Couple things. Be interested so would like to see a pic or two.
And is it possible to make the the drive larger than 1/2" ?

 

[Affordable]

I have sold hundreds of the Jinma chippers,We could have helped you getting the chipper (for less) ,we ship to Austrailia.Send a pic of the chipper,there are several that have copied the Jinma chippers,what will break the 1/2" square drive is the feed roller not going up and down even ,1-spring can cause this because it will allow the feedroller to create too much of a angle on the feed driveshaft.All of ours have 2-springs

This is a pic of a original Jinma chipper does yours look like this.? Once I can see some pic's of yours I can try to offer you some help on fixing it.

Tommy
Affordable Tractor Sales
"Your Jinma Parts Superstore"
Home of compact Jinma, Foton, and Koyker Tractors and Parts, Wood Chippers, Backhoes - Affordable Tractor Sales Company

 

[Ranch_Hand_Supp]

1; found the 1/2 inch square drive on the outer dog clutch had sheared off.

2; Ive searched here to see if this is a common fault but no one has mentioned it that I can find, must just be mine, the metal has visible flaws which would make it weaker but looking at the feed drive line I would have thought 1/2 inch square drive would be under sized to handle the supposed 6 inch capacity,


3; Ive read here repeatedly about needing to be properly set up,

4; the manual only says put on the base and discharge shute, no mention of other adjustments so any in put would be great,

5; also the manual shows 2 springs to hold down the drive roller, mine arrived with only 1 fitted to the right side,

6; I was wondering if that had caused the problem by allowing the drive side of the feed roller to kick up disproportionately to the other side that was spring tensioned.

7; Seems people here are very happy with their Jinma chippers so with luck it was a 1 off and the new part will solve all my woes but I dont relly beleive it will, any coments on what may have caused this and how it avoid a repeat would be great

1; I have seen several types/styles of feed drum drive shafts being used. Some are just plain junk. Would be nice to see pictures of yours.

2; As of yet , I have not seen/had problems with the 1/2 square drive??.... maybe a new defect.?

3; True.

4; Assume nothing. Go over completley.

5; Should have two.....

6; Don't think that caused it to break.

7; We sell all of our chippers serviced and prepped. There are several copies / clones of Jinma chippers on the market now. Some have done a poor job cloneing which has caused several problems for people. Feel free to email some pictures to me via my web site and I will be glad to help you if I can ?.


Jinma Dealer, Wood Chipper , Compact Jinma Tractors


Ronald
Ranch Hand Supply

 

[Dreamin_Tractors]

Here is a chipper manual, I believe it was from a Liberty Chipper (which is a Jinma), I also included some really good notes that a TBN'r put together a while back. It includes proper set-up/tune-up techniques.

Hope this helps.

 

[iwanta]

Thanks to Ranch hands web sight I now know my chipper is not Jinma, this sure gets tricky, I checked out 3 dealer sights, 2 that had the WC chippers and the sight that I got my alleged Jinma from. There were a lot of differences between them such as the WC chipper has 360 swivel discharge,mine is fixed, a flap in the hopper,mine does not, no gusseting at the feed roller,mine does, a cable release safety disconnect where mine has a push rod set up, being so different it seemed they came from different factories and as mine was said to be Jinma I took it as such but now I find out mine is also WC . Now add to this the manual that came with my chipper has a exploded parts list diagram with part no., the number for each part is exactly identical to the order numbers for the Jinma spare parts at Affordable's web sight , holly molly these Chinese chipper makers sure like to confuse us, about all I can say is I have a Chinese chipper, who actually made it is anybodies guess but apparently not Jinma. I sent some pic's by Email to ranchhand, I'd post some here but I havent worked out how as yet

 

[iwanta]

I thinck I have finally got the picks here but there way big
The picture of the chipper is a photo of the operaters manual as my actual chipper is in the shed were I couldnt get a good photo

 

[iwanta]

I'll update my progress on my chipper woes , While waiting for the replacement dog clutch [which was sent on a "VERY slow boat from china" ] I did some repairs to the damaged clutch, bored a hole threw the centre of the clutch,threaded a 1/2 square shaft into the hole and welded it. This at least lasted more than 30 minutes but not by much, this time I could see clearly the metal had no faults at all so poor casting was not the problem, since both times it broke chipping only small branches it wasn't the feed roller jamming so it pointed to the uni joints some how binding up, Ranch Hand gave me some things to look out for [many thanks there :thumbsup:] and it seems my WC 8 chipper when grabbing the branch can make the feed roller spring up to the max height unevenly coursing the uni's to lock up and something has to give, thankfully it was the clutch both times not the gearbox. Ranch Hand suggested I lower the feed roller stops down, this makes my 8 inch chipper only a 6 inch chipper but for me that's no problem, over 3 inch's is fire wood anyway. Since doing this I have had 6 + hours of trouble free chipping, still worried it might break yet again and come to a grinding halt but as more hours go by I get less worried I have to wonder if it is just my WC 8 this has happened to or are others having a problem all so

 

[gino45]

These chippers will do a lot of work; however, I expect problems on mine.
Do you have 2 springs now, which you mentioned earlier?
The 'transmission'. as its called, can't handle the larger branches and that is when the damage occurs. I finally bought a substitute from betst (Oregon) which has u joints at either end. I use it with the spring and the end pieces from the original drive and have had no more problems; however, had to switch to 37" belt as 36" was too short and 38" was too long when using the u joint set up.
My biggest complaint is the difficulty of accessing/removing blades. That is a real PITA!

 

[iwanta]

Do you have 2 springs now, which you mentioned earlier?

Yes I got a 2nd spring, everyone except the dealer that sold the chipper says it should have 2 springs, I'm thinking 1 went missing and it was easier to say " they only use 1 spring now" than send away for the missing spring.

The 'transmission'. as its called, can't handle the larger branches and that is when the damage occurs. I finally bought a substitute from betst (Oregon) which has u joints at either end.

I was thinking to do the same thing if it gives any more trouble but so far it's going great after dropping the the stops