Case 770 EX - Engine Lubrication System

Engine-Engineandcrankcase
Thisenablesprecisetimingbeingmaintainedduringthelifeoftheengine.
Thecrankshaftgeardrivestheidlergear,whichisattachedtothefrontofcylinderblock.
Theidlergearthendrivesthecamshaftandtheinjectionpumpviameshinghelicalgears.
Thecamshaftgearisboltedtothefrontoftheshaftandiskeyedtomaintainpositionofthegearonthecamshaft.
Lubricationsystem
Lubricationoftheengineismaintainedbyageartypeoilpumpmountedonthefrontendofthecrankshaft.
Thepumpdrainsoilfromtheengineoilsumpthroughatubeandscreenassembly.
Aspringloadedreliefvalveisintegralwiththeoillterandpreventsoverpressurizationofthesystem.
Aspinontypeoillterismountedexternallytoitssupporthousingonthelefthandsideoftheengine.
Oilowsfromtheltertothemainoilgallery,whichrunsthelengthofthecylinderblock,whichalsointersectsthe
camshaftfollowerchamber.
Themaingalleryalsosuppliesoiltothecrankshaftmainbearings,connectingrodsbothbigandsmallendsandtiming
gearbushes.
Theinnersideofthepistonsandpinsarelubricatedbyoilpressurejets(pistoncoolingnozzle).
Timinggearsarelubricatedbysplashedoilfromthecamfollowerchamberandthepressurelubricatedcamshaftdrive
gearbushing.
Anintermittentowofoilisdirectedtothevaluerockerarmshaftassemblyviaadrilledpassageinthecylinderblock.
ThisislocatedverticallyaboveNo.3camshaftbearingandalignstoaholeinthecylinderhead.Therotationofthe
camshaftallowsacontrolledintermediateowoflubrication.
PTIL13TLB0737FA2
4819054426/09/2017
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