User Manual

Maintenance 4-17
1502-UM051E-EN-P – June 2013
1. Makesurethecontactorisintheopen(ortripped)state.
 2. Removelatchpivotboltwitha3/16"AllenkeyasshowninFigure4.21,and
remove the lever assembly. e latch spring is no longer retained at this
pointandmayfalloutofthecore–donotmisplacethisspring.
 3. RemovetherollermountingboltasshowninFigure4.23allowingtheroller
to be removed.
 4. Insertthenewrollerandinstalltherollermountingbolt.
 5. Makesurethatthelatchspringisseatedproperlyinthecore,positionthe
lever assembly and install the latch pivot bolt. e spring must be seated
properly in the retaining holes in both the core and the lever.
Trip Coil Lever
Roller mounting bolt
Latch roller
Figure 4.23 – Mechanical Latch Assembly
 Withtheexceptionoftheroller,thelatchmechanismwilllasttheratedlifeof
the contactor. If the contactor is used beyond the rated life, the latch mecha-
nism should be refurbished by replacing the lever assembly, latch spring and the
armatureplate.esepartscanbeorderedpre-assembledasRefurbishingKit
#80158-058-51.
 1. Removelatchpivotboltwitha3/16"AllenkeyasshowninFigure4.21,and
remove the lever assembly. e latch spring is no longer retained at this
point and can be removed and discarded.
 2. Makesurethatthenewlatchspringisseatedproperlyinthecore;position
the new lever assembly and install the latch pivot bolt. e spring must be
seated properly in the retaining holes in both the core and the lever.
 3. Loosenthelockingnutonthereturnspringcompressionboltandwithdraw
thecompressionboltuntilthereturnspringisrelaxed.Removethereturn
springasshowninFigure4.2.
 4. Removethearmatureplatemountingbolts.Discardthearmatureplateand
installthenewarmatureplate.Reinstallthereturnspringandadvancethe
compressionboltuntilthearmatureplatemakescontactwiththestopas
showninFigure4.10.Advancetheboltoneadditionalfullturntoensure
thatthecontactoropensfully.Holdingthecompressionboltinpositionwitha
wrench,tightenthecompressionboltlockingnut.
Mechanical Latch Roller
Replacement Procedure
Mechanical Latch Mechanism
Refurbishing Procedure