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I believe they almost completely overhauled the internal components of the chipper. The Jinma chipper is a good design but the factories never stop cutting corners to save money so the chippers end up with weak joints, cheap oil, and screws/nuts/bolts that strip, break, and come loose far too easily. Here are a couple of the modifications. Basically, the way these factories work is that if you don't have your own people/factory with complete control over product, corners will be cut and the units will be unreliable. Liberty has their own production facility allowing them to not be at the mercy of the Chinese factories who cut corners at any opportunity.

1) Modified worm reduction gearbox so that you can easily view gear oil levels w/o taking apart the chipper
2) Upgraded the drive shaft joint which breaks constantly on most Jinmas (I attached a picture of the new drive shaft joint versus the old one)
3) Used upgraded bolts/nuts on virtually every part of the chipper, preventing them from wiggling loose as happens on standard Jinmas.
4) Replaced all the cheap oil with a high performance alternative.
5) Added access holes in various parts of the chipper to make swapping out parts easier.
6) I don't really know what else, but my understanding is that lots of things were tweaked and improved.

Checkout libertychippers.com/driveshaft1.jpg, libertychippers.com/driveshaft2.jpg,libertychippers.com/driveshaft3.jpg,libertychippers.com/driveshaft4.jpg

Anyone use a Jinma chipper
Jinma Farmpro Agracat Nortrac
Replies 31 Post by ryanjobs