3
A. GENERAL INSTRUCTIONS
Instructions found herein cover disassembly, assembly and parts identification of 3E-143, 143J and
162 pumps.
NOTE: Individual contracts may have specific provisions that vary from this manual. Should any
questions arise which may not be answered by these instructions, refer to
General
Installation, Maintenance and Trouble Shooting Manual, SRM00046
provided with
your order. For further detailed information and technical assistance please refer to Imo
Pump, Technical/Customer Service Department, at (704) 289-6511.
This manual cannot possibly cover every situation connected with the inspection, and maintenance of
equipment supplied. Every effort was made to prepare text of manual so that engineering and design data is
transformed into most easily understood wording. Imo Pump must assume personnel assigned to operate
and maintain supplied equipment and apply this instruction manual have sufficient technical knowledge and
are experienced to apply sound safety and operational practices which may not be otherwise covered by
this manual.
In applications where equipment furnished by Imo Pump is to become part of processing machinery, these
instructions should be thoroughly reviewed to ensure proper fit of said equipment into overall plant
operational procedures.
WARNING
If installation, operation and maintenance instructions are not correctly and strictly followed and
observed, injury to personnel or serious damage to pump could result. Imo Pump cannot accept
responsibility for unsatisfactory performance or damage resulting from failure to comply with instructions.
B. INTRODUCTION
Instruction manual covers 3E-143, 143J and 162 series pumps. Specific models covered by this manual
are identified in Table 2. Model of each particular pump is identified on pump end cover. Refer to Figure 1
for definition of model designator. Refer to assembly drawing corresponding to your pump model, Figures 3
through 11 as you use this instruction manual.
C. DESCRIPTION OF EQUIPMENT
3E-143, 143J and 162 series pumps are positive displacement, rotary screw pumps consisting of precision
bored housings which enclose a driven screw (power rotor) and intermeshing following screws (idler rotors).
These screws when rotating form a succession of closures or cavities. As they rotate, fluid is moved axially
from inlet port to outlet port in a continuous, uniform flow with minimum fluid pulsation and pump noise.
D. PUMP MODEL IDENTIFICATION
This service manual covers Imo Series 3E-143, 143J and 162 pumps. The model of each pump is identified
on pump nameplate. Refer to figure 1 and table 1 for instructional keys when using this manual.
