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Waterous CRQA Manual

Fire pump
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Model CRQA Fire Pump
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.
Instructions subject to change without notice.
Overhaul Instructions
Form No.
Section
F-1031
4312

Table of Contents

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No longer used, replaced by
F-1031-4214 and F-2876
QA Transmission
Overhaul
Issue Date
Rev. Date
03/02/98 05/08/20
2
2
2
3
4
4

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Summary of Contents for Waterous CRQA

  • 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: Introduction

    Introduction This instruction provides the necessary steps to overhaul model CRQA fire pumps. Note that the instructions are divided into Disassembly and Reassembly sections. Ordering Repair Parts When ordering repair parts, furnish the reference number of the component (from Service Parts List) along with the Pump Model and serial number.

  • Page 3: General Overhaul Information

    Installing Ball Bearings speed, for instance, indicates that impellers and/or wear rings are probably Most Waterous pumps are designed so that ball bearings fit tightly on their worn. shafts and have relatively loose fits in the bearing housings. When mounting Cleaning these bearings on shafts, always apply force to the inner races.

  • Page 4: Disassembly Index

    Disassembly Index: Reassembly Index: Remove Pump from Vehicle: Inspection and Repair ....... . . Drain Fluid from Transmission .

  • Page 5: Disconnect Driveline

    Disassembly Remove Pump From Vehicle Drain fluid from transmission. Disconnect propeller or drive shafts to pump transmission. Disconnect pump intake and discharge piping. Disconnect cooling and drain lines, electrical wiring and similar equipment from pump and accessories. F-1031, Section 4312 Page 5 of 23...

  • Page 6: Disassemble Pump: Remove Intake Adapter

    Disassembly Intake Adapter, Impeller & Mechanical Seal Removal Before disassembling the pump, mark the position of the intake adapter, Remove the three (3) screws that attach the mounting bracket to the intake adapter and volute body and the mounting bracket to each other. volute body.

  • Page 7: Disassemble Transmission: Remove End Yoke

    Disassembly Removal of End Yoke Remove the cotter pin, shaft nut, or self-locking nut and washer from the drive shaft. Do not reuse self-locking nut. Apply lubricating oil to the threads before removing. Slide the end yoke off the shaft. Self-Locking Nut (Used After April 20, 1998) Castle Nut...

  • Page 8: Remove Bearing Cover And Oil Seal Housing

    Disassembly Removal of Bearing Cover and Oil Seal Housing Remove the six (6) hex head screws from the bearing cover. Remove the bearing cover and shims. Remove the six (6) hex head screws from the oil seal housing. Remove the the oil seal housing and shims. Note the number of shims that were removed with the oil seal housing and bearing cover for reassembly.

  • Page 9: Remove Case Cover

    Disassembly Removal of Case Assembly Remove the fifteen (15) hex head screws from the cover of the case assembly. Remove the two (2) dowel pins. Lock Washers Remove the cover by inserting hex head screws in the two (2) 3/8 in. jacking screw holes.

  • Page 10: Remove Drive And Impeller Shafts

    Disassembly Removal of Drive and Impeller Shafts Lift the drive shaft assembly, impeller shaft assembly and chain up evenly until the drive shaft assembly clears the bore. Remove the drive shaft assembly and chain. Remove the impeller shaft assembly. NOTE: Take care not to scratch the oil seal sleeve or mechanical seal journal on the impeller shaft.

  • Page 11: Disassemble Drive Shaft

    Disassembly Disassembly Sprocket and Bearings - Drive Shaft Inner Ball Bearing Position the drive shaft assembly in a vertical position in a press with the spline end of the shaft up and the sprocket supported by the table of the press.

  • Page 12: Inspection And Repair

    Reassembly Inspection and Repair Impeller and Wear Rings Check wear rings and impeller hubs for deep grooves or scratches. Spirol Clean and remove small burrs or other protrusions from the wear ring inner grooves or grooves parallel to the impeller shaft increase leakage. Inspect diameters and the impeller hub O.D.
  • Page 13 Reassembly Inspection and Repair (Continued) Impeller Shaft Examine shaft for signs of severe scratches, grooves or corrosion, especially Scratches in the area of the bellows of the mechanical seal can possibly be under the oil seal or mechanical seals. If scratches are not severe, and are removed by spinning the shaft in a lathe and polishing with a fine emery not under seals, they can be ignored.

  • Page 14: Assemble Transmission: Assemble Drive Shaft

    Reassembly Reassembly Sprocket and Bearings - Drive Shaft Inner Ball Bearing Insert key into keyway in the drive shaft. Line up the keyway in the sprocket with the key in the drive shaft. Press drive shaft into the sprocket, drive shaft spacer and outer ball bearing. Drive Shaft Press the inner ball bearing onto the drive shaft.

  • Page 15: Install Impeller Shaft

    Reassembly Installing Impeller Shaft Assembly Install oil seal in pump body. Make sure the lip of the seal is facing towards the transmission. Add blocking as shown and lower impeller shaft assembly into the bore of the Oil Seal transmission until the top of the sprocket is approximately 1/2" higher than the top of the case (see side view - cutaway below).

  • Page 16: Install Drive Shaft

    Reassembly Installing Drive Shaft Assembly Drive Shaft Assembly Lower the drive shaft assembly into the transmission. Wrap the chain around the sprocket. Remove blocking and then lower both the drive shaft assembly and the impeller shaft assembly into their bores simultaneously Transmission (note that this may require two people to perform this task).

  • Page 17: Install Case Cover

    Reassembly Install the Case Assembly Cover Place a new gasket between the case and cover. Lower the case assembly cover onto the case. Tap in the two (2) dowel pins. Secure the cover by inserting and tightening the fifteen (15) hex head bolts. Lock Washers 3/8 in.

  • Page 18: Install Bearing Cover And Oil Seal Housing

    Reassembly Installing Bearing Cover and Oil Seal Housing Before installing oil seal in the seal housing, coat the seal outer diameter evenly with sealant (Loctite Ultra Blue RTV Silicon Sealant). Be sure that the seal, shaft and seal housing are clean. Always install a seal with the seal lip facing in.

  • Page 19: Install End Yoke

    Reassembly Installing the End Yoke Install oil seal. Slide the end yoke on the shaft. Note that care must be taken not to damage the oil seal. Install the cotter pin, shaft nut, or self-locking nut and washer onto the drive shaft. Apply lubricating oil to the threads before installing.

  • Page 20: Assemble Pump: Install Mechanical Seal

    Note: If Waterous Mechanical Seal Lubricant part no. 52608 is not available, P80 rubber lubricant, straight dish soap or glycerin may be substituted. Apply a light coating of seal lubricant to the O-ring in the stationary seal ring of the mechanical seal.
  • Page 21 Reassembly Intake Adapter, Impeller & Mechanical Seal Installation Continued Install the spring over the seal assembly. 12. If the impeller turns freely, tighten screws evenly from side to side. Torque to 75 lb.ft. Install key in the impeller shaft and then install the impeller, washer and locknut and snug up the nut.

  • Page 22: Final Assembly Steps

    Lubrication Final Assembly Fill transmission to the bottom of the oil level plug hole with ATF. 1. Check all fasteners for tightness. Capacity is approximately 1.50 quarts (1.42 liters). 2. Install pump in vehicle. 3. Connect propeller or drive shafts to pump transmission. NOTICE 4.

  • Page 23: Testing

    Testing Before a pump is returned to service, it is advisable to give it both hydrostatic and operational tests to check it for leads and it make sure the pump operates properly. Hydrostatic Testing Operational Testing Connect pump to a hydrant or other pressurized water supply. Operate pump at its maximum intended service pressure.

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