
4.2MaintainingtheO-ringSeal
IfthemainbodytolidO-ringsarenotinstalled,install theO-rings
beforediving. Theircareandmaintenancearecriticaltothe
watertightintegrityofthehousing. IftheO-ringsarecontaminated,
ornotalreadyinstalled;inspect,greaseandinstalltheO-rings
accordingtothefollowing guidelines.
4.3Inspection,cleaningand re-instillationoftheO-rings
Tools
Asoftcottonbud orspongeapplicator,makesurethesearefree ofall chemicalsorcontaminationsuchasloose
fibers, andthetubeofsiliconegreasesuppliedwiththehousing. Noteothertypesofsiliconegreasespecifically
forusewithunderwatercameraequipmentcanusuallyalsobeused. Itisadvisedtocarryoutthefollowing
procedureonafirmcleanlevelsurface, e.g. atatable, topreventskidding especiallywhendiving fromaboat.
WhentomaintaintheO-ringseal
RemovetheO-ringperiodicallyforinspection. Itisnotnecessarytoremove, cleanandre-installtheO-ring
aftereverydiveprovidedtheO-ringsarenotbecomecontaminated. Asaruleofthumbssetup thecameraand
housingbeforeaday’sdiving. Ifthehousingisrequiredtobeopenedbetweendivesforchanging memorycard
orre-chargingbatteries,makesuretheoutsideofthehousingisthoroughlytoweleddrybeforeopeningup.
Afterremoving thelidandservicing thecamera, replace thelidstraightaway, ratherthanleavingitlying
around. Beforereplacing thelid, checktheo-ringsandmakesurethatnocontaminationsuchasdust,hair, salt,
sandetc.hasfallenontotheO-ringorO-ringrecess, asaprecautionwerecommend toinspecttheO-ringevery
timethelidisopenedandtocarryoutthemaintenanceonlyifnecessary.
Procedure
•Place thelidonafirmnon-sliplevelsurface.
•TheO-ringcanbeextractedusinganO-ringextractortool(make
surethetoolhasnosharpedges).Alternativelyusetheflatsofthe
thumbstogentlystretchtheO-ringontwofacesthusmaking a
small loopprotrudingafewmm. Theloopcanthenbegrasped
betweenfingerandthumb, topulltheO-ringoverthelip.
•CleantheO-ringrecess(thesquaregroovewheretheO-ringsits)
withacottonbud.
•InspecttheO-ringall thewayrounditssurface fordamagesuch
ascuts tears orcontamination. Thisshouldbedonevisuallyand
alsobyfeeling thesurface texturebetweenfingerandthumb.