Weifang 495 - Piston - Connecting Rod Assembly

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____ 3
--' 4
---- "- .. - .. -. ',. 8
9
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/ 1/
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Fig. 10 Piston--ConIlecting rod assembly
I--Top compression ring; 2-Second and third compression ring; 3--0il ring
(or composite oil ring);4-Piston;5--Piston pin;6-Snap ring 35 7--Connect-
tng rod small end bushing; 8--- ConnectiI}g rod; 9- Connecting rod cap; 10-- Cqn-
necting rod bolt; Il--Connecting rod bearing shell; 12-Dowel pin 4d4 X10; 13-
Lock. wire.
The crankshaft is made of rare -earth nodular cast iron. It has
four connectirlg rod journals and five main journals. All of them are
case - hardened in order to improve their wear resistan~e.
. . .
Thin -wall plaitl bearing shells n1:ade of steel back lined with
,
tin - aluminium alloy are u~ed for main bearings and: con'necting
rod bearings. The clearance between the journal and the plain
bearing is unadjustable, whenever a "bearing shell is wo~n beyond
32