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Read through the safety information
and overhaul instructions carefully
before repairing your Waterous
CRQB Series Fire Pump.
NOTE: Instructions subject to change without notice
Waterous Company, 125 Hardman Avenue South, South St. Paul, Minnesota 55075 USA (651) 450-5000
Cross-Section View of CRQB
www.waterousco.com
CRQB Series Fire Pump
Overhaul Instructions
Table of Contents
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F-1031, Section 4319 (Revised: 1/19/18)
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Summary of Contents for Waterous CRQB Series
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Page 1: Table Of Contents
Read through the safety information and overhaul instructions carefully before repairing your Waterous CRQB Series Fire Pump. NOTE: Instructions subject to change without notice F-1031, Section 4319 (Revised: 1/19/18) Waterous Company, 125 Hardman Avenue South, South St. Paul, Minnesota 55075 USA (651) 450-5000 www.waterousco.com... -
Page 2: Introduction
Introduction This instruction provides the necessary steps to overhaul CRQB 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 (CRQB) and serial number. Refer to the Service Parts Lists furnished with your pump for identification of individual components. -
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: Drain Fluid From Transmission
Disassembly - Remove Pump from Vehicle Drain Fluid from Transmission 1. Remove drain plug from transmission pan. Transmission holds approximately 4.5 quarts (4.25 liters) of lubricant. Remove Pump 1. Disconnect driveline, intake piping, discharge pip ing, drain lines and any accessory equipment con nections. -
Page 6: Remove Intake End Of Pump
Disassembly - Remove Intake End of Pump Intake Adapter, Impeller & Mechanical Seal Removal NOTE: The wear rings in the volute body and intake adapters cannot be removed without being destroyed. Inspect the wear rings and impeller per instructions on Page 15 to determine if replacement is required. -
Page 7: Remove Pump From Transmission
Disassembly - Remove Pump from Transmissions Removal of End Yoke Removal of Oil Seal, Throttle Bushing, Mechanical Seal Stationary Ring Stand the pump in a vertical position with the intake adapter flange of the pump Remove the oil seal from the bore in the volute body. body volute facing down. -
Page 8: Remove Case Covers
Disassembly - Remove Chain Remove Case Covers Remove the transmission case covers as shown to access the chain. O-ring Hex Head Screw 3/8-16 x 1 in. Top Cover O-ring Wave Spring O-ring Bearing Cover O-ring Hex Head Screw Hex Head Screw 3/8-16 x 1 in. -
Page 9: Disconnect And Remove Chain
Disconnect and Remove Chain As viewed from the oil pan end of the transmission, rotate the shaft until the Push the connecting pin into the chain towards the access hole as indicated. chain connecting pin is located (chain link with spirol pins on each side of the With a needle nose pliers, reach into the access hole, grasp the pin and remove. -
Page 10: Remove Impeller Shaft From Case
Disassembly - Remove Impeller Shaft Remove Impeller Shaft from Case With the transmission resting on the pump mounting flange, press the impeller shaft down and out of the case. F-1031, Section 4319 Page 10 of 32... -
Page 11: Remove End Yoke And Hydraulic Adapter
Remove End Yoke and Hydraulic Adapter Remove the hydraulic pump, hydraulic adapter and end yoke from the drive shaft. Remove and discard oil seals and O-rings. Hydraulic Pump (Not supplied by Waterous) Oil Seal Hex Head Screw 3/8-16 x 1 in. -
Page 12: Remove Drive Shaft From Case
Remove Drive Shaft from Case With the transmission case resting on the pump mounting flange side, press the drive shaft down until the drive sprocket contacts the inside wall of the case. Continue to press the shaft down and out of the case. Note that the drive sprocket, spacer, bearing and oil seal sleeve will remain in the case. Remove the drive sprocket, spacer, bearing and oil seal sleeve from the case. -
Page 13: Disassemble Shaft: Impeller Shaft
Disassembly - Disassemble Shafts Disassemble Impeller Shaft Remove the bearing locknut and washer. Press the shaft out of the outbaord bearing, spacer & sprocket while supporting the sprocket. Remove the key. Remove the spacers. Press the shaft out of the inboard bearing. The oil seal sleeve used prior to January 15, 2018 may be left on the shaft if undamaged. -
Page 14: Drive Shaft
Disassemble Drive Shaft Remove the sprocket key. Remove the spacer. Remove the outboard bearing. Spacer Sprocket Key Outboard Bearing Drive Shaft F-1031, Section 4319 Page 14 of 32... -
Page 15: 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 16 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.
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Page 17: Assemble Drive Shaft
Reassembly - Assemble Shafts Assemble Drive Shaft Press the single row outboard bearing on the shaft. Slide the spacer on the shaft. Spacer Outboard Bearing Drive Shaft F-1031, Section 4319 Page 17 of 32... -
Page 18: Assemble Impeller Shaft
Assemble Impeller Shaft Install the oil sleeve used on assemblies made prior to January 15, 2018 Press the single row bearing on shaft. on shaft, if it was removed. Install the bearing washer and bearing locknut on the shaft. When retaining the shaft during locknut assembly, take care not to damage the mechanical Press the double row bearing on shaft. -
Page 19: Install Bearing In Case
Reassembly - Install Drive Shaft Installing Bearing in Case Install bearing in case bore. Bearing is to be flush with face of case flange. Lay the transmission case on its side with the pump flange facing up. Reaching through the opening in the case, set the spacer and then the driven sprocket on the bearing installed in step one. Note that the chamfer on the spacer must face towards the bearing. -
Page 20: Install Drive Shaft In Case
Install Drive Shaft in Case Adjust Position of Shaft Install the sprocket key in the drive shaft assembly. Tap the outer race of the bearing on the splined end of the shaft back until it is located .500 in. (12.70 mm) below the face of the case flange. Guide the drive shaft assembly into the sprocket bore. -
Page 21: Install Oil Seal Housing And End Yoke
Install Oil Seal Housing Cover and End Yoke Install Hydraulic Adapter Install the wave spring in the case bore. 15. Install the oil seal and O-ring in the hydraulic adapter. Install the oil seal sleeve on the shaft. 16. Install the hydraulic adapter on the case. Lightly tap into the case bore. 10. -
Page 22: Install Impeller Shaft In Case
Reassembly - Install Impeller Shaft Install Impeller Shaft in Case Install Bearing Cover Lay the transmission case on its side with the pump flange facing up. Install the wave spring in the case bore. Guide the impeller shaft assembly into the case bore. Install small O-ring in access hole groove. -
Page 23: Install Chain In Case
Reassembly - Install Pump Chain Install Chain in Case Clean the chain with a degreasing agent to remove any protective coating. Wrap the ends of the chain around the driven (impeller shaft) sprocket and lace the ends together. Drop the chain into the top end of the case while wrapping the chain around the drive sprocket. -
Page 24: Connect Chain
Connect Chain Rotate the impeller shaft until the joined end joint is aligned with the access hole Restrain the impeller shaft to prevent movement during the next steps. in the case. Install the connecting pin rocker through the access hole and into the chain. Drive in until flush with the chain. - Page 25 Connect Chain (Continued) Install the connecting pin along side the connecting rocker in the chain hole. Install the spirol pin in the connecting pin hole on the opposite side of the driven Drive in until the spirol pin is flush with the chain. Note that the curved side of sprocket.
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Page 26: Install Case Covers
Install Case Covers Install the oil pan and gasket. Install the four (4) screws and lockwashers. Torque screws to 31 lb-ft. 10. Install top cover and gasket. Install the four (4) screws and lockwshers. Torque to 31 lb-ft. Top Cover Gasket, 6-3/4 in. -
Page 27: Install Oil Seal In Pump Body
Reassembly - Install Pump on Transmission Install Oil Seal in Pump Body Install Pump Body on Transmission Install the oil seal in the bore of the pump body volute. Make sure the lip of the seal Install the O-ring in transmission flange groove. is facing toward the transmission. -
Page 28: Install Mechanical Seal
Apply a light coating of seal lubricant to the O-ring in the stationary seal ring. Note: If Waterous Mechanical Seal Lubricant part no. 52608 is not available, P80 rubber lubricant, straight dish soap or glycerin may be substituted. b). Identify the lapped surface of the seal stationary ring. The un-lapped face of the stationary ring has a mark. - Page 29 Install Mechanical Seal (Continued) Install the seal bellows: Install the seal spring over the seal bellows. a). Apply a piece of tape over the shaft keyway which will protect the seal Install the seal spring retainer on the back side of the impeller. bellows during installation.
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Page 30: Install Impeller And Intake Adapter
Install Impeller and Intake Adapter Install the impeller key and impeller on the shaft. Install the impeller washer and Install the sixteen (16) screws and lockwashers. Tighten the screws until the flange nut. Note that the raised rib on the washer must face the impeller nut. Tighten of the intake adapter contacts the volute body. -
Page 31: Final Assembly Steps
Final Assembly and Lubrication Final Assembly Steps Lubrication 1. Check all fasteners for tightness. Fill transmission to the bottom of the oil level plug hole with ATF. Capacity is approximately 4.50 quarts (4.25 liters). 2. Install pump in vehicle. 3. Connect propeller or drive shaft to pump transmission. 4. -
Page 32: Testing
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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