WEICHAI & PSI SERVICE MANUALS AVAILABLE ONLINE AT FLYPARTSGUY.COM Weichai America Corp. 9.3 Rocker and Rocker Shaft Assembly and Disassembly 9.3.1 Rocker and Rocker Shaft Exploded View Fig. 9-3 Exploded view of rocker and rocker shaft 9.3.2 Rocker and Rocker Shaft Disassembly Procedure 1. Rotate the crankshaft to ensure that the rocker moves smoothly. 2. Measure each valve clearance, and check any changes in valve clearance. 3. If the rocker is not flexible or the valve clearance is too big, loosen the hex screw and then remove the rocker seat, shaft circlip, butterfly spring washer, rocker and the other butterfly spring washer. Mark the items to prevent improper assembly.
9.3.3 Rocker and Rocker Shaft Assembly Procedure ① Check whether all to-be assembled pars are clean, free of bump damage, scratch and rust; ② Install rocker adjusting screw and lock nut, the screw should be fully screwed in, while the lock nut only needs to be screwed in for 2~3 thread pitches; ③ Apply lubricating oil on rocker seat and rocker inner hole, and install butterfly spring washer, rocker assembly, the other butterfly spring washer and circlip for shaft on rocker seat; ④ Loose-fit rocker seat on cylinder cover with hexagon bolts; Revision: August 2019 38 GET YOUR WEICHAI & AFTERMARKET SERVICE PARTS AT FLYPARTSGUY.COM