Service Manual for WP6 Diesel Engine
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343 Disassembly, Inspection, Maintenance and Assembly of Crankshaft
3431 Exploded View of Crankshaft
Fig. 3-29 Exploded view of crankshaft
3432 Steps to Disassemble Crankshaft
(1) Put the engine crankcase upward, and then remove main bearing bolts and place them orderly;
(2) Take down crankshaft and flywheel, remove front and rear thrust plates and flywheel bearing.
Remove oil seals; place the crankshaft on bracket (for long time storage, the crankshaft should
be placed vertical);
(3) Classify the removed parts according to the requirements.
3433 Inspection and Maintenance of Crankshaft
(1) Check whether there is crack on fillet area of crankshaft main journal and neck of crankshaft;
Check the joint part of crankshaft and main bearing for crack, check and dredge the oil gallery.
(2) Check the wear condition of crankshaft main journal and neck of crankshaft, and check whether
there is line-like puckering, metal peeling and crack.
(3) Check the wear condition of front and rear oil seals.
(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.
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