105400-5930 ZEXEL 9 420 612 757 BOSCH GOVERNOR 9420612757 1054005930

When lifting cylinder head, care must be taken to keep cylinder head level to prevent damage to the two cylinder head-to-block dowels.
2. Lift the cylinder head off the block. The approximate weight of the cylinder head is 47 Kg (104 Lbs.). The following steps are for the installation of the cylinder head.3. Thoroughly clean cylinder head and block surfaces.4. Position the head gasket and the cylinder head onto the dowels in the block. Lower the cylinder head onto the block.5. Put 5P2506 Thread Lubricant on the threads of bolts (1) and install. Tighten bolts (1) as follows:
Cylinder Head Tightening Sequencea. Tighten large bolts in number sequence shown to a torque of 150 15 N m (110 11 lb.ft.).b. Tighten large bolts in number sequence shown to a torque of 435 20 N m (320 15 lb.ft.).c. Retorque large bolts in number sequence shown to 435 20 N m (320 15 lb.ft.).d. Tighten small bolts in number sequence shown to a torque of 55 7 N m (41 5 lb.ft.).End By:a. install fuel injectorsb. install fuel control linkage and perform injector synchronizationc. connect fuel control linkage to governor and adjust the fuel settingd. install rocker arm assemblies and push rodse. adjust the fuel timing and valve clearance.f. install valve base and coverg. install fuel filter and crankcase breatherh. install exhaust manifold