Circor IMO 110, Instruction Manual And Parts List

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Tools
Standard shop tools are required for the procedures given in this manual. An accurate torque wrench must
be used to tighten all hex bolts and cap screws
CANNED MOTOR PUMP DISASSEMBLY AND ASSEMBLY INSTRUCTIONS
NOTE: The below disassembly procedure applies to the pump only. The motor is not field repairable
and must be returned to the factory for repair or replacement.
PUMP REMOVAL AND DISASSEMBLY (See Figure 4)
1. Separate pump from canned motor by removing bolts (205) and O-ring (432).
2. Remove key (213) from power rotor (311).
3. Remove four hex bolts (203) with lock washers (207).
4. Remove inlet head (202).
5. Remove idler rotors (314) with thrust shoes by screwing them out of rotor housing (201).
6. Remove rotor housing (201) with O-ring (409).
7. Remove O-rings (409) from rotor housing (201).
8. Remove four cap screws (223) and ball bearing retainer (222).
9. Remove power rotor assembly (311) from inboard cover (204)
10. Remove truarc rings (217) and bearing (216) from power rotor (311).
PUMP REASSEMBLY AND INSTALLATION (SEE FIGURE 4)
NOTE: Imo Pump recommends replacement of 0-rings when these parts are disturbed from their original
installed positions.
NOTE: Prior to pump re-assembly, check each part and remove any burrs then wipe all parts with lubricating
oil. Rotate power rotor frequently during assembly to assure rotational clearances.
1. Clean all parts prior to assembly.
2. Install bearing (216) on power rotor (311) with truarc rings (217). Be sure to press only on inner race
when installing bearing.
3. Install power rotor assembly (311) in inboard cover (204).
4. Install ball bearing retainer (222) and four cap screws (223). Torque Cap Screws (223) to value on
assembly.
5. Lubricate the housing (201) pilots with a light oil or hydraulic fluid and install new O-ring (409) against
shoulders of housing (201).
6. Lubricate the thread section of the power rotor (311) and install housing (201) on inboard cover (204).
7. Lubricate idler rotors (314) with light oil or hydraulic fluid and screw into housing (201).
8. Install inlet head (202) using cap screws (203) and lock washers (207). Torque cap screws (203) to
value shown on assembly drawing.
9. Turn power rotor (311) by hand. Rotor should turn freely.
10. Install key (213) in rotor keyway.
11. Install O-Ring (432) on motor front cover.
12. Install pump into motor with hex bolts (205). Be sure key (213) in pump shaft engages keyway in
motor shaft. Torque bolts per values on assembly drawing (Figure 4).
WARNING
After Assembly and prior to testing, reinstalling or operating unit, perform a High
Potential test per NEMA MG1-1993 Section 1, Part 3.
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