WEICHAI & PSI SERVICE MANUALS AVAILABLE ONLINE AT FLYPARTSGUY.COM Weichai America Corp. ⑨ Press lower bearing shell and lower thrust plate (the side with oil groove should face crankshaft) into crankcase and assemble the crankshaft. ⑩ Apply clean lubricating oil on crankcase bolt bearing surface and main bearing bolt thread. Place main bearing bolts and pre-tighten them according to the order shown in Figure below. Firstly pre-tighten to 70Nm, and then tighten each bolt for another 90°±4°. Assembly of crank shaft is finished. Fig.
11- 10 Tighten order of main bearing bolts 11.6.4 Inspection and maintenance of crankshaft system 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. Revision: August 2019 67 GET YOUR WEICHAI & AFTERMARKET SERVICE PARTS AT FLYPARTSGUY.COM