Oki ML521, ML520 manual

P/N 50097501 Tractor: Assembly (Narrow) RSPL 520 B.2.06

P/N 50097502 Tractor: Assembly (Wide) RSPL 521 B.2.06

P/N 51228001 Gear: Change RSPL Both B.2.05

P/N 51228101 Gear: Tractor RSPL Both B.2.05