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Waterous CP-4 Overhaul Instructions

Centrifugal fire pump
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CP-4 Centrifugal Fire Pumps
Waterous Company 125 Hardman Avenue South, South St. Paul, Minnesota 55075 USA (651) 450-5000
All content in this instruction is property of the Waterous Company. Instructions subject to change without notice.
All content in this instruction is property of the Waterous Company. Instructions subject to change without notice.
All content in this instruction is property of the Waterous Company. Instructions subject to change without notice.

Table of Contents

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General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Inspection and Repair . . . . . . . . . . . . . . . . . . . . . . . . . .
Impellers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Undersize Wear Rings . . . . . . . . . . . . . . . . . . . . 10
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Hydrostatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Operational Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
CP−1, CP−2, CP−2L & CPD−2 Series Overhaul
Instructions subject to change without notice.
Overhaul Instructions
Form No.
F-1031
Impeller and Wear Ring Repair Dimensions . . . . . . . . . . . . 10
2
1.
2
2
2
CP-4 CW Input Rotation Exploded View . . . . . . . . . . . . . . . . 3
2
1.
2
CP-4 CCW Input Rotation Exploded View . . . . . . . . . . . . . . . . . . 4
2.
. . . . . . . . . . . . . . . .
2
Impeller Design A Cross Section View . . . . . . . . . . . . . . . . . 7
3.
2
Impeller Design B Cross Section View . . . . . . . . . . . . . . . . 8
4.
2
Impeller Design C Cross Section View . . . . . . . . . . . . . . . . . 9
5.
Impeller Repair Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.
9
Interstage Seal and Packing Housing Replacement . . . . . . 11
7.
9
8.
Impeller Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9.
Packing Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Section
Issue Date
Rev. Date
1/12/21
4207.1
10/79
Tables
Illustrations

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Summary of Contents for Waterous CP-4

  • Page 1: Table Of Contents

    ......CP-4 CCW Input Rotation Exploded View ....4 Bearings, Gaskets, Seals and O-rings .

  • Page 2: Introduction

    This section contains overhaul instructions for Waterous CP-4 centrifugal Examine pump bodies, covers, adapters and fittings for cracks, severe fire pumps. Several types of transmissions are used with the CP-4 pumps. corrosion or other damage. Almost all damage to these parts results from Refer to separate instructions for the particular transmission you have.

  • Page 3: General Description

    Figure 1. CP-4 CW Transmission Input Rotation Exploded View Note: Two gear transmissions are used with CP-4 pumps causing the pump impeller shaft to rotate oppostie the transmission input rotation.

  • Page 4: Ccw Input Rotation Exploded View

    Figure 2. CP-4 CCW Transmission Input Rotation Exploded View Note: Two gear transmissions are used with CP-4 pumps causing the pump impeller shaft to rotate oppostie the transmission input rotation. F−1031, Section 4207.1 Page 4 of 14...

  • Page 5: Disassembly

    Disassembly Refer to Figures 1 & 2 " To disassemble the pump, perform the following: 12. Remove body gasket (B53) or Permatex on the body flanges. 13. Remove impeller shaft assembly from lower body. 1. Disconnect the drain lines and similar connections to the pump and pump transmission.
  • Page 6 Disassembly " To disassemble the pump, perform the following: (Cont'd) 15. Impeller Removal Notes: 1) Impellers are installed on the shaft with a light press fit. 2) The impellers, interstage seal and packing housings cannot be removed from the transmission end of the shaft due to the seal/bearing journal. All components must be removed from the outboard bearing end of the shaft.

  • Page 7: Impeller Design A Cross Section View

    Figure 3. Impeller Design A Page 7 of 14 F−1031, Section 4207.1...

  • Page 8: Impeller Design B Cross Section View

    Figure 4. Impeller Design B Page 8 of 14 F−1031, Section 4207.1...

  • Page 9: Inspection And Repair

    The following points cover inspection and repair of the major components exists about the actual condition of any part, replace the part as a precau­ of CP-4 pumps. Check all parts that are not covered in this instruction in tionary measure.

  • Page 10: Installing Undersize Wear Rings

    Installing Undersize Wear Rings For all impellers for CP-4 pumps which have separate wear rings, the re­ If inspection shows that the wear ring clearances are excessive or the im­ placement rings are available as follows: peller hubs are scored or grooved, turn the impeller hub on a lathe to an acceptable dimension.

  • Page 11: Interstage Seal And Packing Housing Replacement

    Interstage Seal and Packing Housing Replacement Interstage Seal Packing Housing Measure the inside diameter of the interstage seal (measurement D) and NOTE: Both packing housings are to measured, one on each end of the outside diameter of the impeller shaft (measurement C) at the location the pump.

  • Page 12: Reassembly

    Reassembly Refer to Figures 1 & 2 Reassembly of the CP-4 pumps is essentially the same as the disassem­ the impellers fit tightly on the shaft and that the gib head keys are bly procedure, except it is reversed. Note that if undersize wear rings are properly seated.

  • Page 13: Packing

    Packing Braided flexible graphite (BFG) split rings are used as both standard and 5. Carefully install one ring of packing. With the aid of packing glands, push replacement packings. the packing into the stuffing box as far as possible. Repeat this operation with each ring, staggering the joints at least 90_ apart.

  • Page 14: Final Assembly

    Final Assembly 3. Connect the cooling and drain lines, electrical wiring and similar To complete final assembly, perform the following: equipment to the pump and accessories. 1. Connect the propeller or drive shaft to the pump transmission if 4. Fill the pump transmission with lubricant as directed in the transmis­ equipped with a K series transmission.

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