Disassembly, Inspection & Reassembly
236 Series Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
69
11. If the pump is fitted with component mechanical seals, verify that the axial setting position
of the mechanical seals is correct.
12. Install both distance bushes (124) onto the gear side of the screw shafts (100).
13. Install both keys (132) then install both spur gears (108) onto the screw shafts (100)
14. Install both locknuts (110) with Loctite® 243 or equivalent.
15. Install gaskets (439) onto the pump casing (350).
16. Install the subassembly of screw shafts (100) and cover DF (401) into the pump casing
(350) and liner (352). Secure cover DF (401) to the pump casing (350) with screws
(310).
17. If the pump is fitted with component mechanical seals, install seal cover (470) and O-ring
(703) onto cover D (407) and secure with screws (471). Install the stationary portion of
the mechanical seal (702) and anti-rotation pin (480) into the seal cover (470).
If a cartridge seal is fitted the cartridge seal, install the cartridge seal into cover D (407)
and secure with screws (471).
18. Working with cover D (407) press in oil seals (721).
19. Install cover D (407) onto pump casing (350) and secure with screws (310).
20. Working with cover D (407) press in bearings (103). Verify that the screw shafts turn
freely without binding or tight spots. Install gasket (448), cover KA (410) and screws
(435).
21. Press oil seal (704) into gear housing (706)
22. Install gasket (440). Install dowel pins (375) if they were removed. Install gear housing
(406) and secure with screws (434).
23. Close the gear housing (406) drain port using plug (443) and sealing washer (479).
24. Fill the gear housing (406) with the correct oil to the center of the sight glass and close
the filling port.
25. Close all support threads or bores with permanent plugs.
26. Check for oil leaks and correct oil levels.
