OM−00750−08December 10, 1979Rev. B 01-25-10ACDETHE GORMAN-RUPP COMPANY MANSFIELD, OHIOwww.grpumps.comGORMAN-RUPP OF CANADA LIMITED ST. THOMAS, ON
80 SERIES OM−00750PAGE B − 3INSTALLATIONmum use of elbows and fittings, which substan-tially increase friction loss. If elbows are necessary,use the l
OM−00750 80 SERIESPAGE B − 4 INSTALLATIONtance equal to at least 3 times the diameter of thesuction pipe.Suction Line PositioningThe depth of submerge
80 SERIES OM−00750PAGE B − 5INSTALLATIONBypass LinesIf a system check valve is used due to high dis-charge head, it may be necessary to vent trappedai
OM−0075080 SERIESOPERATION PAGE C − 1OPERATION − SECTION CReview all SAFETY information in Section A.Follow the instructions on all tags, labels andde
OM−00750 80 SERIESOPERATIONPAGE C − 2Lines Without a BypassOpen all valves in the discharge line and start themotor. Priming is indicated by a positiv
OM−0075080 SERIESOPERATION PAGE C − 3After stopping the pump, disconnect the incomingpower to the motor and lock it out to ensure that thepump will re
TROUBLE POSSIBLE CAUSE PROBABLE REMEDYPUMP FAILS TOPRIMEStrainer clogged. Check strainer and clean if neces-sary.Suction lift or discharge head too hi
TROUBLE POSSIBLE CAUSE PROBABLE REMEDYPUMP STOPS ORFAILS TO DELIVERRATED FLOW ORPRESSURE (cont.)PUMP REQUIRESTOO MUCHPOWERPUMP CLOGSFREQUENTLYFree imp
OM−0075080 SERIESTROUBLESHOOTING PAGE D − 3PREVENTIVE MAINTENANCESince pump applications are seldom identical, andpump wear is directly affected by su
80 SERIES OM−00750MAINTENANCE & REPAIR PAGE E − 1PUMP MAINTENANCE AND REPAIR - SECTION EMAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WI
Register your newGorman-Rupp pump online atwww.grpumps.comValid serial number and e-mail address required.RECORD YOUR PUMP MODEL AND SERIAL NUMBERPlea
80 SERIESOM−00750MAINTENANCE & REPAIRPAGE E − 2SECTION DRAWINGPARTS PAGEFigure 1. Pump Model 81 1/2D3−E.50 1P
80 SERIES OM−00750MAINTENANCE & REPAIR PAGE E − 3PARTS LISTPump Model 81 1/2D3−E.50 1P(From S/N 262113 Up)If your pump serial number is followed b
80 SERIESOM−00750MAINTENANCE & REPAIRPAGE E − 4PUMP AND SEAL DISASSEMBLYAND REASSEMBLYReview all SAFETY information in Section A.Follow the instru
OM−0075080 SERIESMAINTENANCE & REPAIR PAGE E − 5(11 and 12) securing the intermediate to the motor(13). Slide the intermediate and seal assembly o
80 SERIESOM−00750MAINTENANCE & REPAIRPAGE E − 6SEAL PLATEIMPELLERSHAFTSTATIONARYSEATSTATIONARYELEMENTROTATINGELEMENTDRIVE BANDIMPELLERSHIMSIMPELLE
OM−0075080 SERIESMAINTENANCE & REPAIR PAGE E − 7Install the vane plate O-ring (24) and the pump cas-ing gasket (20). Carefully slide the pump casi
For U.S. and International Warranty Information,Please Visit www.grpumps.com/warrantyor call:U.S.: 419−755−1280International: +1−419−755−1352For Canad
TABLE OF CONTENTSiINTRODUCTION PAGE I − 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAFETY - SE
TABLE OF CONTENTS(continued)iiPARTS LIST:Pump Model PAGE E − 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80 SERIESOM−00750PAGE I − 1INTRODUCTIONINTRODUCTIONThank You for purchasing a Gorman-Rupp pump.Read this manual carefully to learn how to safelyinstal
80 SERIESOM−00750PAGE A − 1SAFETYSAFETY - SECTION AThis information applies to 80 Serieselectric motor driven pumps. Refer tothe manual accompanying t
80 SERIESOM−00750PAGE A − 2 SAFETYthe applicable local code, the Nationalor local code shall take precedence.The electrical power used to operatethis
80 SERIES OM−00750PAGE B − 1INSTALLATIONINSTALLATION − SECTION BReview all SAFETY information in Section A.Since pump installations are seldom identic
OM−00750 80 SERIESPAGE B − 2 INSTALLATIONing, check for loose hardware at mating sur-faces.c. Carefully read all tags, decals, and markingson the pump
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