Oki Microline 520 Service Handbook page 122

3.2.04 Gear Case Assembly
1. Perform these procedures: 3.2.01, and 3.2.02.
2. Use a straight-slot screwdriver to release the four claws (1) of the gear case assembly
(2).
3. Lift and remove the gear case assembly.
NOTE:
Lubrication
When lubricating, refer to Section 3.5 of this Service Handbook.
P/N 51228501 Gear: Case (Assembly)
Maintenance
RSPL
3 - 10 Microline 520/521 Service Handbook
Both B.2.07
P/N 59257803