Case IH Magnum 310 - Page 55

Engine-Engineandcrankcase
Crankshaft
•
Thecrankshaftareclassiedinthreeclasses:thereare
threeclassesfortheconnectingrodjournalsandthree
classesforthemainjournals.
•
Thecrankshaftjournalsizesarestampedontherear
yweightforboththeconnectingrodjournalsandthe
mainjournals.
•
Sixdigitsfortheconnectingrodsandsevendigitsfor
themains.
•
Thecrankshaftmayhavebeenground-0.127mmun-
dersizefromthefactory.A(1)precedingthesixdigits
isastandardcrankshaft,a(2)precedingisforacrank-
shaftthathasbeengroundundersize.
•
Themainbearingboresintheblockareclassed1,2,or3
andarelocatedontherearoftheblocklowerrighthand
side.Iftheclassicationsarenotfound,thecrankshaft
mustbemeasuredandclassiedforeachjournal.
CRANKIDENTIFY18
Standardcrankshaftconnectingrodbearingselection
Connectingrodbore
Standardcrankshaft
connectingrodjournals
Class(1)YellowpaintClass(2)GreenpaintClass(3)Bluepaint
GreenGreen
Yellow
Class(1)81.915to81.925
mm
Green
YellowYellow
Red
GreenGreen
Class(2)81.925to81.935
mm
GreenGreen
Yellow
RedRed
Green
Class(3)81.935to81.945
mm
Red
GreenGreen
NOTE:Itmaybenecessarytomixtwobearingshellsinonejournal.
0.127mmunder-sizecrankshaftconnectingrodbearingselection
Connectingrodbore -0.127mmStandard
crankshaftconnectingrod
journals
Class(1)YellowpaintClass(2)GreenpaintClass(3)Bluepaint
Green/BlackGreen/BlackYellow/Black
Class(1)81.789to81.799
mm
Green/BlackYellow/BlackYellow/Black
Red/BlackGreen/BlackGreen/Black
Class(2)81.799to81.809
mm
Green/BlackGreen/BlackYellow/Black
Red/BlackRed/BlackGreen/Black
Class(3)81.809to81.819
mm
Red/BlackGreen/BlackGreen/Black
5143149922/02/2018
10.1[10.001]/14