9
9
8.
Mesh two idler rotors (8) and power rotor (7) together into a rotor assembly making sure idler rotors and
balance piston are properly engaged.
9.
Install rotors
by positioning pump housing in a vertical position and sliding rotor assembly into housing
bore (1) until ball bearing (11) bottoms out in housing bore.
10.
Install O-ring (31) in groove in inboard cover (4).
11.
If steel pump, install break down bushing (19) in inboard cover (4).
12.
Install inboard cover (4) on housing being sure that inboard cover (4) is kept square with power rotor shaft.
13.
Install four bolts (3) into inboard cover (4) and thread bolts into housing (1). Torque bolts to values shown
on assembly drawing.
14.
Install O-ring (31) in groove in inlet head (2).
15.
Install inlet head (2) onto housing (1) with cap screws (3).
16.
Installing
key (13) into power rotor (7) keyway and coupling on shaft (7).
INSTALLATION, ALIGNMENT AND TROUBLESHOOTING
Install coupling to driver shaft and align pump and driver as detailed in the Installation Manual, CA-1.
After pump is connected to piping and inlet and outlet valves are open, be sure to vent air from seal chamber
before starting pump by opening pipe plug at inboard end of pump until oil comes out. This will assure seals
are lubricated at startup.
For detailed instructions regarding installation, alignment, operation and trouble shooting, see General
Installation, Operation, Maintenance & Troubleshooting Manual, CA-1.
FIELD AND FACTORY SERVICE AND PARTS
Imo Pump maintains a staff of trained service personnel that can provide pump installation, pump start-up,
maintenance/overhaul and troubleshooting supervision as well as installation and maintenance training.
Our factories provide maintenance as well as overhaul and test facilities in the event user prefers to return
pumps for inspection or overhaul. Pumps that have been factory-overhauled are normally tested and
warranted “as-new” for a period of one year from date of shipment.
For either field service or factory overhaul assistance, contact your local Imo Sales Office or representative at
the Technical/Customer Service Department in Monroe, NC, USA.
Most pumps have minor repair kits available. Minor Repair Kits are used to repair leaking seals, bad
bearings and/or for re-assembly after pump tear-down. They include (as applicable) pump shaft seals,
packing, all gaskets/O-rings and bearings. Since kits have all the necessary parts, it is preferred that they be
purchased rather than selecting individual parts. When parts are individually selected from Parts List, some
needed components are often overlooked. In addition, mixing worn or used parts with new parts risks rapid
wear and shortened service life from new parts.
