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General
Importance of instructions
The design, material, and workmanship incorporated into the construction of Goulds pumps
make them capable of giving long, trouble-free service. The life and satisfactory service of any
mechanical unit, however, are enhanced and extended by correct application, proper
installation, periodic inspection, and careful maintenance. This instruction manual was
prepared to assist operators in understanding the construction and correct methods of
installing, operating, and maintaining these pumps.
Study thoroughly
carefully follow the instructions for installation and operation. Sections
corrective maintenance
(page 21), and
questions. Keep this instruction manual handy for reference. Further information can be
obtained by contacting your local branch office or the Engineered Products Division, Goulds
Pumps, Inc., Seneca Falls, New York 13148.
Special warnings
Goulds Pumps, Inc. will not be liable for any damages or delay caused by failure to comply with
the provisions of this instruction manual. This pump is not to be operated at speeds, working
pressures, discharge pressures or temperatures higher than, nor used with liquids other than,
stated in the original order acknowledgement without written permission of Goulds Pumps, Inc.
Receiving inspection shortages
Care should be taken when unloading pumps. If shipment is not delivered in good order and in
accordance with the Bill-of-Lading, note the damage or shortage on both receipt and freight bill.
Make any claims to the transportation company promptly. Instruction sheets on various
components, as well as the Instruction Book for the pump, are included in the shipment - Do
not discard.
Preservation and storage
GouIds normal domestic storage preparation is suitable for protecting the pump during
shipment in covered trucks. It also provides protection during covered storage at the jobsite,
and for a short period between installation and start-up.
CAUTION: The Model 3935 is flushed with ethylene glycol at the factory and should be
thoroughly flushed for 30 minutes prior to installation in the customer's system. A caution tag
has been affixed to the pump regarding the instructions. Once the pump is flushed with water,
it should be kept completely filled to minimize rust formation.
Handling techniques
Care should be used in moving pumps. Where required by size of units, slings should be put
under both pump and motor.
Model 3935 Installation, Operation and Maintenance Instructions
General
(page 2),
Installation
(page 8),
Disassembly and reassembly
Ordering spare parts
(page 23) are answers to trouble and maintenance
(page 3), and
Operation
Preventive and
(page 9),
General
(page 5) Sections and
Troubleshooting
3
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