Service Manual

Weichai America Corp.
Revision: August 2019 3
7.2 Fan Assembly and Disassembly ..................................................................................... 27
7.3 Thermostat Disassembly and Assembly ......................................................................... 28
7.4 Water Pump Assembly and Disassembly ....................................................................... 29
8 Front Cover Components ................................................................................................... 30
8.1 Torque Vibration Damper and Crankshaft Pulley Assembly and Disassembly ................ 30
8.2 Gear Housing Assembly and Disassembly ..................................................................... 31
8.3 Intermediate Gear Assembly and Disassembly ............................................................... 34
9 Cylinder Heads and Valves ................................................................................................ 36
9.1 Lifting Lugs Assembly and Disassembly ......................................................................... 36
9.2 Cylinder Head Cover Assembly and Disassembly .......................................................... 36
9.3 Rocker and Rocker Shaft Assembly and Disassembly .................................................... 38
9.4 Tappet and Pushrod Assembly and Disassembly ........................................................... 39
9.5 Cylinder Heads Assembly and Disassembly ................................................................... 41
9.6 Assembly and disassembly of valve................................................................................ 44
10 Oil & Lubrication System ...................................................................................... 47
10.1 Assembly and disassembly of oil sump. ................................................................ 47
10.2 Disassembly and Assembly of Engine Oil Strainer ............................................... 48
10.3 Disassembly and Assembly of Lubricating System ............................................... 49
10.4 Assembly and disassembly of piston nozzle. ........................................................ 49
10.5 Disassembly and Assembly of Engine Oil Pump ................................................... 51
10.6 Disassembly and Assembly of Engine Oil Filter .................................................... 51
10.7 Disassembly and Assembly of Engine Oil Cooler ................................................. 52
10.8 Disassembly and Assembly of Main Oil Gallery Pressure Limiting Valve .............. 53
10.9 Disassembly and Assembly of Deputy Oil Pressure Limiting Valve ....................... 54
11 Crank-rod mechanism .......................................................................................... 55
11.1 Assembly and disassembly of flywheel housing .................................................... 55
11.2 Assembly and disassembly of flywheel and ring gear ........................................... 57
11.3 Assembly and disassembly of front oil seal and rear oil seal ................................. 59
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