For combines not originally equipped with single point adjustment. For John Deere combines 9650STS, 9750STS, 9660STS, 9760STS, 9860STS s/n 710001 & up with fine cut 2-speed chopper.
For installing SH320242 drum on early model without 4-bolt cast bearing flanges. For John Deere combines 9560 (walker) to s/n 710392; 9660CTS to s/n 710407; 9660STS to s/n 711301; 9760STS to s/n 711197; 9860STS to s/n 710892.