User Manual

Chapter 4
Maintenance
Tool Requirements When maintenance is performed on the vacuum contactor, one or all of the fol-
lowing tools may be required.
 • 3/8"driveratchetwrenchwithextension
 • 3/8"drivetorquewrench
 • Standard3/8"drivesockets;7/16",9/16",3/4"
 • Openendwrenches:7/16",9/16",11/16",3/4",7/8"
 • 3/16"Allenkey
 • 3/16"dia.rod
 • Slotheadscrewdrivers;1/8"wide,1/4"wide
 • Feelergaugeset(0.125"and0.300")
 • Digitalcalipercapableofdepthmeasurement
 • Highpotentialtester
Recommended Torque Values Part of the contactor may have to be disassembled for maintenance or replace-
ment. ere are appropriate torque requirements for particular bolt sizes when
reassemblingthecontactor.Forthefollowingboltsizes,usethespeciedtorque
valueslistedbelow:
 1/4”Hardware 6-lb(8N-m)
 3/8”Hardware 20-lb(27N-m)
 1/2”Hardware 48-lb(65N-m)
Routine Maintenance e following should be carried out on an annual basis or whenever a contactor
isserviced:
Cleaning
• Ensurethatmetalchipsorlingsarecleanedfromaroundtheelectromagnet
assembly(coilcorepolefaceandmatingarmatureplate)astheymayaect
proper operation of the contactor. If necessary, vacuum clean.
Note:Donotusecompressedairtocleanorremovedirtfromsurfacesor
the enclosure as it will only redistribute the dirt.
 • If dirty, clean the white ceramic area of vacuum bottles with a clean lint-free
cloth.
1502-UM051E-EN-P – June 2013