Weichai America Corp.
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4.
Check whether there is failure like thread damage on main bearing bolts
5.
Check crankshaft flange bolt holes for crack.
6.
Check wear condition of crankshaft journal, check bend and distortion condition of
crankshaft.
3.3
Assembly and disassembly of crankshaft bearing shell
3.3.1 Exploded view of crankshaft bearing shell
Fig. 3-4 Exploded view of crankshaft bearing shell
3.3.2 Steps to disassemble crankshaft bearing shell
Push the shells out with hand, and mark the removed shells (should be corresponded with holes
on engine block and crankcase).
3.3.3 Steps to assemble crankshaft bearing shell
1.
Clean up main bearing shells and the fitting holes.
2.
If no shell is replaced, then install the two shells into engine block (upper) and crankcase
(lower) respectively (pay attention to the mark, shells should be installed into corresponding
holes on engine block and crankcase), do not mix upper and lower shells, the one with oil
groove is upper one. The shell lips should be aligned and applied with engine oil.
