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A. GENERAL INSTRUCTIONS
Instructions found herein cover disassembly, assembly and parts identification of _G3D _-350 and 400
series pumps. Both original design with idler cups and newer design with hydrostatic idlers are covered
where applicable.
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
Imo General
Installation Operation, Maintenance, and Troubleshooting 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.
Manual cannot possibly cover every situation connected with installation, operation, 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 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
This instruction manual covers series _G3D_ _-350 and 400
Imo pumps. This series of pumps has been
designed for use in hydraulic, lubricating, seal, distillate, residual, fuel and crude oil applications. The
model and design construction of each pump can be identified by the designator code on the pump
nameplate. Definitions of model designators are identified in figure 1.
C. DESCRIPTION OF EQUIPMENT
_G3D_ _-350 and 400
Series pumps are positive displacement, rotary screw pumps consisting of a
precision bored housing which encloses a driven screw (power rotor) and two 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.
