Siemens GMI Series Instruction

Also see for 15-GMI-1000: Installation operation & maintenance

Maintenance&Overhaul Page31andspringcapwhichbecomeavailableafterthe openingspringisremoved.Theopeningspring pullrodisdisassembledbyunthreadingthe rod fromthe jackshaftpivot.Reassemblyrequiresthepartsbe assembledinreverseorder.Ifused,the kickoffspringisnot to beassembled withprecompression.Apply jamnuts and spring captobearfirmlyon the kickoffspringandjamthe retaining nutsbyoppositerotation.Theopening spring mustbeprecompresseduponassemb-lyby advancingthe retainingnutsuntil theproper springlengthisobtained.Jamtheretainingnutsbyoppositerotation.Twodifferent opening springsareused,dependingon thecircuitbreakerratings.Onespringhas a freelengthof12inches,andwheninstalledshouldbecompressed to 9.0inches.The otherhasafreelengthof7.5 inches,andwheninstalledshouldbecompressedto 6.88inches.screws whichattachtheclosecoil andthequickdisconnectterminalforcontrolleads.Thetripcoilarrangementissimilar.Replacementof Anti-PumpRelay( Device 52Y)Figure55helpsillustratetheanti-pumprelayremovalpro-cedure.Thetwonuts holdingthe relayanditsmountingbracketareremoved.Thewiresconnected tothe relaym3Figure54. ReplacementofClosing Solenoid.IFigure 53.RemovalofOpening Spring.Replacement of Closing and TrippingSolenoids(Devices 52SRCand 52T)Replacementof eitherthe closingortrippingsolenoidsisstraightforward.Each solenoid hastwo mountingscrewsand one quick disconnect terminal.Removing the mountingbolts andquick disconnect terminalofthesolenoid permitsitto be slid out and removed.Replacement requires carefulinsertionofthe solenoid and re-attachment of the mountingbolts and quick disconnect.Figure 54 shows the twoFigure 55.Replacement of Anti-PumpRelay.