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Engine overhaul manual page showing piston, crankshaft and main…

Scanned page from an engine overhaul service manual (page EM-25) covering Assembly procedures for piston, crankshaft and main bearing selection. Includes diagrams of the connecting rod tool (KV10109800), upper/lower main bearings, cylinder block main journal grade numbers, and crankshaft journal grade markings.

AI caption · Photo 79 of 412

ENGINE OVERHAUL Assembly PISTON a. Numbers are stamped on the connecting rod and cap corresponding to each cylinder. Care should be taken to avoid a wrong combination including bearing. 1,, When pressing piston pin in connecting rod, apply engine oil to pin and small and of con- necting rod. KVI omeeoo I ~ ) _L_J SEMozaA CRANKSHAFT 1. Set main bearings in, the proper position on cylinder block. Thrust bearing Upplv main burill Timing bolt sid- anr mam mung; -mkhw Timing bolt sm- SEMDJSE Main bearing selection 1. If all of crankshaft, cylinder block and main hearing are replaced with new ones, it is neces- sary to select thickness of main bearings as follows: if either crankshaft, cylinder block or main bearing is reused again, i! is necessary to measure main bearing clearance with plastigage. a. Each engine is punched with numbers which indicate cylinder block main journal. Each bore is measured separately. Main journal grids number (cylindov block) No. 2journal N 3"'' . Na iOMInal No I journal 7 / l a [g V 7m . . No. 5 journal a In... If ban sun %1 L3, v OQQQ b. Each crankshaft is punched with numbers which indicate main journal dimensions. Each journal is measured separately. arm-(mm iwvnll and. rumba No IIaIIIIIaI i 1 e No 5journal No ZjournalAWUk No. aluumai No. a mum1 Cranksnan from sun In use No. 5 journal is uudl No. a. SEM7SA

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