Which trans does 4030 have (SR or QR). I had a 4030 with SR trans when I 1st started custom rd baling. I much prefer the QR trans with twice as many speeds. Perma-clutch on JD tractors is very good as my 4255 with same type clutch has 11,600+ hrs on original clutch & it's operated a rd baler starting/stopping over 100,000 times not to mention the many 100's of acres this clutch has been used to pull a plow.
If 686 operator station & controls are anywhere close to same design as a 986 I'd choose 4030 for sure. Yrs back I drove my friends 986 for 4 hrs & disconnected it & attached 24 ft field cult to my JD 4255 to complete plowing. Every yr after initial yr I plowed for my friend I used my 4255.
I was unaware JD 329 CID engine had a bad history of engine cylinder liner failure due to cavitation. 329 CID diesel engine utilizes same part # for cylinder liner used in 153 different JD engines.
I think poor coolant maintenance is the major cause for liner cavitation.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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