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My John Deere 990 4 WD makes a clunking sound when placed in 4WD. I visually inspected and see no obvious problem. The shift lever to engage the 4wd operates ok-no bind. I am attempting to remove the front drive shaft to inspect where it goes into the front differential. My technical manual...

John Deere 990 ran out of diesel fuel. Coasted off a bank and tried to restart. Cranked briefly then refilled with fuel. Started but had to bleed. Ran rough and discovered 1st cylinder closest to dash is not firing. All other cylinders are firing good. Removed and cleaned injector for that...