Jd 3300 driving belt

I need some help on how to change the lower driving belt on a jd 3300 combine. The upper belt has been replaced but the lower on hasn't and needs to be so if I could figure out how to get the belt off I'd appreciate it.
 
the drive belts i beleive are a matched set and should both be changed same time . . if possible .. yiu will need .to find a manual. will be best bet to adjust when changed . . just look at it . and should be no problem to repair . you will need to remove the varible speed sheeve . its heavy. loosen four bolts where tensioner. is and back out. adjuster . remove . variable speed and replace belts . reverse to assemble but a manual is needed to set it up right . . got mine at farm manuals cheap. .. was like 20 bucks. and downloadable .. .
 
You need to get a manual. I have never replaced the drive belt on our 3300 but I have read the manual enough to know I think have to time the sheaves with the new belt.
 

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