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The UPF1127 costs about $10 compared with about 5 for JD. Both filters are made by Champion Labs and to the same specs regarding anti-drain back values and pressure release. UPF AC Delco is top-of-line filter with synthetic media. Since oil in Diesel gets dirtier faster, I will use UPF 1127 as insurance. Further, I change oil @ 6 hrs an filter every 12. Oil quantity is only 2 qts, so even using Mobil's best 15-40, it is no biggie.
I shall post picts of all filters soon, including cut-aways from used filters of all types. If JD made its own filters, I would be more inclined to by JD. But if a better is available, why not use it. Marginal issue I suppose, but that is my choice.

4100 Filter Part 1
John Deere Tractors
Replies 9 Post by DJR

After 9 hours, drive shaft fell off as collar lock had not been set. Lucky, no damage. However, when I tried to re-connect, the rear coupling did not go on as shaft hit a hydraulic line near frame, prevent the exact alignment that is needed for the splines. Had to "hammer" 5/16" diameter metal line toward center of tractor so it would not hit driveshaft, then I could install driveshaft, itself. Clearance is about 1/16th inch. Has anyone encountered the same problem with long driveshaft that is under tractor and supplies power to snowblower?

Mid-PTO for snowblower
John Deere Tractors
Replies 2 Post by DJR

Part 2<br>Replaced oil on 4100 with 15W40 JD �Supreme Motor Oil PLUS-50� and noticed quart container was similar to container of Amoco Ultimate Gold (manufactured by Chevron). Both containers had same color, shape, size of label, and imprints in bottom of container. Each container also had black ink numbers printed on black plastic in the same location on container, about �� above label. Numbers are different, but same style and type of coloring. Numbers can only be read if you hold the containers at an angle to direct light.<br>Q.4> Is it common knowledge that Chevron makes JD PLUS-50 oil, or is this just errant conjecture on my part?<br>

4100 oil Part 2
John Deere Tractors
Replies 1 Post by DJR