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This section contains overhaul instructions for Waterous CPK-5 Series
centrifugal fire pumps.
The CP-5 series pumps are designed to provide ultra high pressure and
driven by a K-Series Transmission allowing for pump and roll operation.
Tools and Equipment
The following tools and equipment are needed to overhaul a pump:
1. Usual automotive mechanic's hand tools.
2. An arbor press for assembling or disassembling components.
3. An engine lathe for turning impeller hubs.
4. A suitable hoist and slings.
5. Torque capability up to 325 lb-ft.
While no special tools and equipment are required, a few special items are
illustrated or described so the mechanic can make them or they are avail-
able from the apparatus manufacturer or the Waterous Company. These
special items are not absolutely necessary, but they will make the me-
chanic's work much easier.
Preliminary Testing
Before disassembling a pump, test it thoroughly, if possible, and record
the results. A comparison of this test with periodic tests recommended in
form F-1031, Section 1000 can often reveal specific pump troubles. Ex-
cessive speed, for instance, indicates that impellers and/or wear rings are
probably worn.
F-1031, Section 5015
Introduction
Also refer to the Service Parts List (SPL documents), available at
waterousco.com. to aid in further part identification and repair parts order-
ing.
General Description
General Overhaul Information
Cleaning
The continued satisfactory operation of a pump depends to a great extent
upon the cleanliness of its internal parts. Sand, dirt or other abrasive ma-
terial will wear bearings, gears and related parts. Before disassembling a
pump for repairs, be sure to clean its exterior. Make sure the working
space, benches and tools are clean. Use only clean, lint-free cloths to
wipe off components. Before reassembling a pump or its components, be
sure to clean them thoroughly.
Pump Bodies and Impellers
Flush out these components and related parts with clean water. Use a stiff
brush to remove loose scale, caked sediment, etc. Be sure to remove all
traces of old gaskets. Examine pump bodies, covers, adapters and fittings
for cracks, severe corrosion or other damage. Almost all damage to these
parts results from improper use or maintenance, or from freezing. Replace
defective parts.
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