YAJCMT: Yet Another Jinma Chipper Modification Thread

[tcreeley]

That is a nice bit of work you are doing there- chipper is a useful tool!

 

[cycle_gator]

I have exactly the same chipper and I am inspired. I will be interested to see if the Jinma makes enough air to clear the chips out of a six inch chute, that is a lot more cross-sectional area than the OEM chute. If it works, I fully intend to copy you

 

[rswyan]

tc,

Thanks ... yup it would certainly be very handy ... if I can get it dialed in to where I'm not having to fight it.

 

[rswyan]

I have exactly the same chipper and I am inspired.

Kewl ... :thumbsup:

I will be interested to see if the Jinma makes enough air to clear the chips out of a six inch chute, that is a lot more cross-sectional area than the OEM chute.

Yup ... that was a concern I had when making the decision about what size tube to use.

I elected to go with 6" tube and flanges because it completely contained/captured/enclosed the outlet area of the disc housing ...

If I had gone with 5" tube immediately, it would have introduced a restriction into the chip discharge path, as the diagonal measurement of the outlet on the disc housing was over 5 1/2" IIRC ...

I did notice while I was down Cross Truck that they had some 6" to 5" reducers in stock ... so modifying this setup to drop to 5" immediately after the flanges would be pretty easy.

Personally, I don't think it's going to be an issue ... but I certainly could be wrong. I can dimly recall getting into the chip path close to the end of the discharge chute while they were coming out and it seems to me - IIRC - it was rather uncomfortable (pain) ... more like the chips were being thrown with considerable force ... rather than blown ... although I'm sure that air/blowing plays a part.

One thing I have some attention on is the transition from the 6" round tube down into the original stock rectangular discharge chute. I want to make sure that it is pretty smooth ... with no rough edges that might catch chips or slow them down. That transition will probably have to occur over a fairly short distance because I can only reach down into the tube so far and still work effectively.

If it works, I fully intend to copy you

By all means ... :thumbsup:

I'm trying to be fairly detailed with my posts so that folks can do exactly that, if they so desire.

 

[lt190b]

Make Wood Chipper Throw 2x as far and never clog - YouTuberswyan, today viewing a link to youtube I saw guys video about curing a 2stage snow blower clogging problem. In it he made mention of fixing the clog problem and improving discharge on his wood chipper. I will try to post a link here, lt190b

 

[rswyan]

Make Wood Chipper Throw 2x as far and never clog - YouTuberswyan, today viewing a link to youtube I saw guys video about curing a 2stage snow blower clogging problem. In it he made mention of fixing the clog problem and improving discharge on his wood chipper. I will try to post a link here, lt190b

lt,

Good find ... makes sense ... I'll add it to the list ...

Not sure how quick I'll get to it though ... to get that kind of access on a Jinma chipper you basically have to disassemble the entire chipper housing ... which might a reason for yet another mod ...

 

[rswyan]

Got another 2" of 3 x 2 tube welded in on the top link mount so it should be fully quick-hitch compatible. Then added some angle for a mounting frame for a storage basket:

 

[rswyan]

Basket was scavenged from an old upright freezer that gave up the ghost:

 

[rswyan]

12' x 12" x 1/4" sheet of oil-filled UHMW polyethylene from McMaster for the chute rotation bearing ... it's got so much oil in it that when you touch it leaves a sheen on your fingers ... lol:

 

[rswyan]

Drilled 2 holes in the basket mount angle for the basket clamps, also drilled a 3rd hole in the 3 x 2 tube. Since the 3 x 2 will capped, I went ahead and tapped that hole with a 1/4 coarse thread tap.

Took the side panels for the base and drilled 5 holes in each and then swapped the panels, mounting each on the opposite side so that the angle and the holes were outboard where they were accessible. Used the holes to run some 1/4" tapcons into the 4 x 6 x 48 skids to secure the skids to the chipper. The skids should eliminate the tendency for the chipper to tip over towards the back.

Also cleaned up the square rod on the PTO with a needle scaler and a wire wheel in a die grinder: