Waterous CP-1 Series Overhaul Instructions
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Waterous CP-1 Series Overhaul Instructions

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CP-1, CP-2, CP-2L, CPD-2, E301-A
and E302-A Series 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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Removal of Volute Body from Pump Head
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CP-1, CP-2, CP-2L & CPD-2 Series Overhaul
Instructions subject to change without notice.
Overhaul Instructions
Form No.
F-1031
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Summary of Contents for Waterous CP-1 Series

  • Page 1: Table Of Contents

    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.

  • Page 2: Safety Information

    Safety Information Please read through the safety information and operating instructions carefully before using your Waterous Fire Pump. WARNING WARNING Death or serious personal injury might occur if proper operating procedures Unexpected Truck Movement. May result in serious personal injury or are not followed.

  • Page 3: Introduction

    Introduction This section contains overhaul instructions for Waterous CP-1, CP-2, CP-2L Also refer to the Service Parts List (SPL documents) furnished with your pump and CPD-2 centrifugal fire pumps. Although several types of transmissions to aid in further part identification and repair parts ordering.

  • Page 4: Bearings, Gaskets, Seals And O-Rings

    Installing Ball Bearings Examine shaft for severe scratches, grooves or corrosion - especially under Most Waterous pumps are designed so that ball bearings fit tightly on their packing or mechanical seals. If scratches are not severe, and are not under shafts and have relatively loose fits in the bearing housings.

  • Page 5: Cp-1 And Cp-2 Pumps

    CP-1 and CP-2 Pumps A CP-1 and CP-2 pumps may be disassembled in several ways, depending Removing the pump and transmission together and then disassembling the on the type of transmission or piping arrangement. pump is usually the easiest method. Impeller Washer or Figure 1.

  • Page 6: Removal Of Volute Body From Pump Head

    Removal of Volute Body from Pump Head 1. Remove the twelve (12) hex head screws and copper washers that attach 3. Remove and discard the gasket. the pump head to the volute body. NOTE: The wear rings will remain in the volute body and pump head. NOTE: Self-locking hex head screws (nylok) are used on pumps with Removing the wear rings from the body or head is necessary only if bronze bodies.

  • Page 7: Removal Of Impeller

    Removal of Impeller 1. Remove the impeller nut and washers. 2. Remove impeller using puller holes. 3. Remove square key from impeller shaft. NOTE: Nordr-Lock washers are used on pumps manufactured after 2/04/05. Figure 3. Impeller Removal 5/16-18 UNC-2B, (3) Holes on 1.750 B.C. Square Key, 1/4 x 1 in.

  • Page 8: Removal Of Mechanical Seal

    Removal of Mechanical Seal 1. Remove the retaining ring from the impeller shaft. 3. Slide the mechanical seal off the impeller shaft. 2. Lubricate the impeller shaft. Figure 4. Mechanical Seal Removal Impeller Shaft Mechanical Seal Retaining Ring F-1031, Section 4205.1 Page 7 of 24 Rev: 01/18/08...

  • Page 9: Removal Of Pump Packing

    Removal of Pump Packing Removal of Impeller Shaft (Not available on pumps manufactured after 02/04/05) NOTE: Removing the impeller shaft from the pump transmission is not necessary unless it is damaged. If impeller shaft removal is necessary, For removal of the pump packing, follow Packing - Braided Flexible Graph‐ see the appropriate pump transmission overhaul instructions.

  • Page 10: Cp-2L Pumps

    CP-2L Pumps Removing the CP-2L pump and TA transmission together and then disassembling the pump is usually the easiest method for overhauling. Impeller Shaft Figure 5. CP-2L Exploded View (Prior to 2/4/05) Square Key Head (furnished with wear ring installed) Cotter Pin Oil Seal O-ring...

  • Page 11: Removal Of Volute Body From Pump Head

    Removal of Volute Body from Pump Head 1. Remove the twelve (12) hex head screws and copper washers that attach NOTE: The wear rings will remain in the volute body and pump head. the pump head to the volute body. Removing the wear rings from the body or head is necessary only if they are damaged or badly worn.

  • Page 12: Removal Of Impeller

    Removal of Impeller 1. Remove cotter pin, impeller nut and washer. 3. Remove square key from impeller shaft. 2. Remove impeller using puller holes. Figure 7. Impeller Removal Pump Head Impeller Square Key, See Puller Hole Detail 1/4 x 1” Cotter Pin Impeller Nut IL2927...

  • Page 13: Removal Of Mechanical Seal

    Removal of Mechanical Seal 1. Remove the retaining ring from the impeller shaft. 3. Slide the mechanical seal off the impeller shaft. 2. Lubricate the impeller shaft. Figure 8. Mechanical Seal Removal Pump Head Mechanical Seal Retaining Ring Removal of Impeller Shaft NOTE: Removing the impeller shaft from the pump transmission is not necessary unless it is damaged.

  • Page 14: Cpd-2 Pumps

    CPD-2 Pumps Removing the CPD-2 pump and pedestal together and then disassembling the pump is usually the easiest method for overhauling. Figure 9. CPD-2 Exploded View Pedestal Subassembly (furnished with wear ring installed) Hex Hd Screw, 7/16-14 x 1 in. O-ring, 5-3/4 x 6 in.

  • Page 15: Volute Body Removal From Pedestal (Cpd-2)

    Removal of Volute Body from Pedestal 1. Remove the four (4) hex head screws that attach the pedestal to the NOTE: The wear rings will remain in the volute body and pedestal. volute body. Removing the wear rings from the body or pedestal is necessary only if they are damaged or badly worn.

  • Page 16: Removal Of Impeller

    Removal of Impeller 1. Remove cotter pin, impeller nut and washer. 3. Remove square key from impeller shaft. 2. Remove impeller using puller holes. Figure 11. Impeller Removal Pedestal Square Key, 1/4 x 1” Impeller See Puller Hole Detail Nordr-Lock Washers Impeller Nut IL2927 F-1031, Section 4205.1...

  • Page 17: Removal Of Mechanical Seal

    Removal of Mechanical Seal 1. Remove the retaining ring from the impeller shaft. 3. Slide the mechanical seal off the impeller shaft. 2. Lubricate the impeller shaft. Figure 12. Mechanical Seal Removal Pedestal Mechanical Seal Retaining Ring F-1031, Section 4205.1 Page 16 of 24 Rev: 01/18/08...

  • Page 18: Removal Of Impeller Shaft

    Removal of Impeller Shaft Assembly NOTE: Removing the impeller shaft from the pedestal is not necessary 1. Remove the retaining ring from the pedestal. unless it is damaged. If impeller shaft removal is necessary, follow the 2. Press the impeller shaft assembly out of the pedestal in the direction step outlined below.

  • Page 19: Disassembly Of Impeller Shaft Assembly

    Disassembly of Impeller Shaft Assembly 1. Remove the retaining rings from the impeller shaft assembly. 2. Press ball bearings from shaft. Figure 14. Impeller Shaft Assembly Disassembly Retaining Ring (not shown) Ball Bearing Impeller Shaft Ball Bearing Retaining Ring IL2917 F-1031, Section 4205.1 Page 18 of 24 Rev: 01/18/08...

  • Page 20: Inspection And Repair

    Inspection and Repair The following points cover inspection and repair of the major components of with standard automotive shop practices. If the slightest doubt exists about the CP pumps. Check all parts that are not covered in this instruction in accor‐ actual condition of any part, replace the part as a precautionary measure.

  • Page 21: Reassembly

    NOTE: It is very important to keep the sealing surfaces clean. Dirt and oil on the sealing surfaces will prevent a good seal and can NOTE: If Waterous Mechanical Seal Lubricant part no. 52608 is not avail‐ cause premature wear.

  • Page 22: Mechanical Seal Installation

    Figure 15. Mechanical Seal Installation Primary Ring (part of Bellow Assembly) Stationary Ring Rubber Seat Ring Stationary Ring NOTE: Chamfered edge on O.D. Impeller Nut faces away from primary ring. CP-1, CP-2 (After 1/1/98 - (Prior to Prior to 2/4/05) 1/1/98) CP-1, CP-2, CP-2L, CPD-2...

  • Page 23: Packing

    3. If all the packing is not forced out, it may be necessary to remove the re‐ and high purity graphite filament yarns that appear on the corners as well as maining packing by hand, using a pick or similar device. Waterous has a throughout the body of the packing. The graphite reinforcement allows the packing removal tool (P/N 5782) available for this purpose, see Figure 16.

  • Page 24: Packing Adjustment

    Figure 17. Packing and Gland Installation WARNING Truck movement hazard. May cause serious personal injury. Stop engine, set the parking brake and chock the wheels before going under truck to adjust packing. 1. Engage pump per appropriate operating instructions. Operate the pump at the capacity pressure shown on the serial plate for ten (10) minutes.

  • Page 25: Final Assembly

    Final Assembly To complete final assembly, perform the following: 3. Connect the cooling and drain lines, electrical wiring and similar equip‐ ment to the pump and accessories. 1. Connect the propeller or drive shaft to the pump transmission. 4. Fill the pump transmission with lubricant as directed in the transmission 2.

This manual is also suitable for:

Cp-2 seriesCp-2l seriesCpd-2 seriesE301-a seriesE302-a series

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