Disassembly, Inspection & Reassembly
60
236 Series
Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
4. Remove screws (310) which secure the cover D (407) to the pump casing (350).
5. Use jackscrews tapped holes to break the bond between the cover D (407) and the pump
casing (350). Continue to jack cover D (407) evenly until both bearings (103) are free of
the screw shafts (100).
6. If the pump is fitted with cartridge seals, refer to the provided instructions on removing the
cartridge seal from the shaft and perform those steps.
7. Remove cover D (407) intact with bearings (103), oil seals (721).
If a component mechanical seal is fitted the following components will be removed intact
with cover D (407): seal cover (470), O-ring (703), screws (471), stationary mechanical
seal seat (702) and anti-rotation pin (480).
If a cartridge seal is fitted the cartridge seal will be removed intact with cover D (407)
8. Remove gasket (439)
9. Remove screws (434) which secure the gear housing (406) to the cover DF (401).
10. Use jackscrews tapped holes to break the bond between the gear housing (406) and the
cover DF (401).
11. Remove gear housing (406), oil seal (704) and gasket (440) from the cover DF (401).
12. Remove both locknuts (110) to loosen both spur gears (108) from the screw shafts (100).
13. Remove both spur gears (108) from the screw shafts (100). Remove both keys (132).
14. Remove both distance bushings (124) from the gear side of the screw shafts (100).
15. If the pump is fitted with cartridge seals, refer to the provided instructions on removing the
cartridge seal from the shaft and perform those steps to ensure the screw shafts are free
to move.
16. Use a suitable manual or hydraulic tool to apply and even axial pressure to the DE shaft
ends of both screw shafts (100). Using this tool press both screw shafts (100) until they
are free of bearings (105).
17. Remove screws (310) which secure the bearing cover DF (401) to the casing (350).
18. Use jackscrews tapped holes to break the bond between the cover DF (401) and the
pump casing (350).
19. Remove cover DF (401) intact with bearings (105), oil seals (721).
If a component mechanical seal is fitted the following components will be removed intact
with cover D (407): seal cover (470), O-ring (703), screws (471), stationary mechanical
seal seat (702) and anti-rotation pin (480).
If a cartridge seal is fitted the cartridge seal will be removed intact with cover DF (401)
20. Remove gasket (439)
21. Remove both screw shafts (100) simultaneously out of the liner (352). If the pump is
fitted with component mechanical seals, remove the rotating portion of the mechanical
seal (702) from screw shafts (100).
