Brooks Marathon Express - Lid Lifter Replacement

9. Maintenance and Repair Marathon Express
Repair Procedures Part Number: 605914 Rev. B
Step Action
4.
Attachthreeliftingstrapsfromthehoisttothethreeeye-boltsonthelid.Thestrapsmustbeappro-
priatelyratedandaminimumof914mm(3ft)long.
5.
Locatethelidoverthechamberandlowerituntilitalmosttouchesthechamber,takingcarenottodam-
agethesealingsurfaceonthechamber.
6.
Movethelidasrequiredtoallowinsertingthefoursecuringscrewsthroughthelidandintotheir
threadedholesonthetopofthechamber,takecarenottodamagethesealingsurfaceonthecham-
ber.Onlyturnthescrewsenoughtosecurethem.
7.
Lowerthelidontothechamber.
8.
ReplacetheLidLifter.Reference"LidLifterReplacement"onpage194.
9.
Openthelidandinstall,orverifytheconditionof,thelido-ring.
10.
Closeandsecurethelid.
Lid Lifter Replacement
TheLidLifterisavailableasaFRUandhasnouserserviceableparts.TheLidLifterunitcanbe
replacedusingthefollowingprocedure.
ProcedureCategory
Type1Procedure:Equipmentisfullyde-energized.
RequiredTools
l
AsetofHexwrenchesinmetricsizes
l
Adjustableliftorhoist(optional)
ReplacementStrategy
Turnoffanddisconnectallpower,communications,andairconnectionsasdetailedin"Shut-down"
onpage1.
194
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