IMO 3215/525, Instruction Manual And Parts List, Page: 8 / 11

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10. Assemble power rotor (63) and mechanical seal (25) as follows (see seal insert Figure 2).
a. Install O-ring (2) in groove of mechanical seal (25) stationary seat (1). Install mechanical
stationary seat (1) in seal spacer (48) ensuring that spring pin (83) is properly positioned to
engage slot in seal seat.
b. Install seal spacer (38) on power rotor (63).
c. Install mechanical seal (25) rotating assembly (3) on power rotor (63) next to spacer (38).
Tighten set screws (3E).
d. Wipe mechanical seal rotating and stationary faces with a clean, lint free cloth before
assembling faces together.
e. Install assembled bearing spacer (48), with stationary seat (1), to power rotor shaft next to
mechanical seal rotating face.
f. Install inner Truarc ring (42) in groove of power rotor (63).
g. Press bearing (49) on power rotor (63), pressing only on inner race of ball bearing (49) until
it is located next to inner Truarc ring (42).
h. Install outer Truarc ring (42) in groove of power rotor (63).
11. Install gasket (84) in seal bore of inboard cover (46).
12. Install assembled power rotor (63) in pump, centering all parts as they enter inboard cover (46).
Align one of openings in spacer (48) over drain in inboard cover (46).
13. Install bearing retainer (43) on inboard cover (46) using bolts (47). Torque bolts to values
indicated on assembly drawing.
14. Install idlers (35, 21) into housings by meshing threads with power rotor thread and screwing
them into housing idler bores.
15. Install idler balance piston housings (23) to ends of suction idlers (21).
16. Install pin (26) in inlet housing (24).
17. Install thrust cage (29) in pump case (1), ensuring that pin hole in thrust cage (29) engages pin
(26) in suction housing (24).
18. Install retaining rings (8) in pump case (1).
19. Install gasket (9) on inlet head (2).
20. Install inlet head (2) using bolts (4). Torque bolts to values indicated on assembly drawing.
21. Install seal piping (71) and drain plug (67).
Note: Inlet head (2) can be rotated and repositioned in 90° increments to suit suction piping. To
change inlet position, disconnect seal piping (71), remove bolts (4) and rotate inlet head
to desired position. Install bolts (4) and torque to proper values indicated on assembly
drawing. Reconnect seal piping (71).
22. Install coupling hub key (31). Install and align pump and driver as specified in General
Instruction Manual, CA-1.
H.5 SPECIAL TESTING INSTRUCTIONS
After pump has been reassembled with a major kit, it is recommended that a break-in test be
performed to allow idlers to polish into babbitt housing bores. For this test, pump should be run to
maximum required working pressure starting from 300 psig, in 200 psig increments, holding each
pressure for five minutes.