Waterous CR Overhaul Instructions Download Page 1

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Model CR, CRU-1 and CRU-2 Fire Pump

Overhaul Instructions

Table of Contents

F-1031-4214 (Revised: 5/8/20)

Waterous Company, 125 Hardman Avenue South, South St. Paul, Minnesota 55075 USA (651)

General Overhaul Information……………………………………………. 2

Disassembly:

Remove Intake End of Pump

…………………………………. 3

Remove Pump from Bearing Housing

or Transmission………………………………………………… 4

Inspection and Repair…………………………………………... 5, 6
Reassembly:

Install Mechanical Seal…………………………………...……7, 8

Install Impeller

and Intake Adapter……………………………... 9

Lubrication…………………………………………………………… 10
Testing……………………………………………………………….. 10

CR Pump

CRU-1 Pump

CRU-2 Pump

Summary of Contents for CR

Page 1: ...outh St Paul Minnesota 55075 USA 651 450 5000 www waterousco com General Overhaul Information 2 Disassembly Remove Intake End of Pump 3 Remove Pump from Bearing Housing or Transmission 4 Inspection an...

Page 2: ...lint free cloths to wipe off components Before reassembling a pump or its components be sure to clean them thoroughly Flush out these components and related parts with clean water Use a stiff brush t...

Page 3: ...the intake adapter off of the pump body volute Remove and discard the O ring Remove the cotter pin impeller locknut and washer from the end of the im peller shaft 1 Remove the impeller Tapping the imp...

Page 4: ...ck washers attaching the pump volute to the transmission 4 With a hoist lift the pump volute body off of the transmission If the body does not break free tap the body with a soft hammer while lifting...

Page 5: ...opposite side using a feeler gauge Do not bottom the wear ring against the bottom of the groove in the impeller Ball Bearings When cleaning bearings bearing manufacturers recommend placing them in a...

Page 6: ...e The journal may be polished with a fine emery cloth however any polishing that leaves a spiral pattern may lead to an oil leak If a groove has been worn in the sleeve it can be reused by turning it...

Page 7: ...the bore in the volute body If it cannot be seated by hand lightly tap into place with piece of wood being careful not to scratch or mar the lapped face d Wipe the lapped face of the stationary ring w...

Page 8: ...the tape can be removed once the bellows is installed 8 Install the impeller and intake adapter see next page for instructions b Apply a few drops of seal lubricant on the inside of the seal bellows...

Page 9: ...he witness marks made during disassembly Ensure the intake adapter holes and volute body tapped holes are aligned 6 Tap the intake adapter into position in the volute body bore 7 Install the sixteen 1...

Page 10: ...g pump Close all valves Be sure to evacuate all air from pump 4 Apply water pressure to pump for 15 minutes Do not exceed 350 psi 24 2 bar With a portable light check pump for leaks If leaks are disco...