Scania DC12 Work Description

2
©
Scania CV AB 2011, Sweden
01:03-02
Contents
Engine assembly General information.................................................. 4
Removing the engine................................................ 6
Fitting the engine.................................................... 14
Mounting the engine in an engine stand................. 20
Measuring the compression pressure...................... 22
Cylinder head ................................................................................ 25
Removing the cylinder head................................... 26
Fitting the cylinder head......................................... 32
Checking and adjusting the valve clearance........... 36
Removing valves .................................................... 38
Fitting valves .......................................................... 38
Checking and machining valves............................. 39
Renewing the valve stem seal................................. 40
Renewing the valve seats........................................ 41
Machining the cylinder head .................................. 43
Renewing the valve guides..................................... 48
Renewing the injector sleeves ................................ 49
Renewing the unit injector sleeves......................... 51
Cylinder block Reconditioning ....................................................... 54
Removing the cylinder liners.................................. 55
Fitting the cylinder liners........................................ 56
Measuring and machining the cylinder liner
height ...................................................................... 57
Renewing the rear crankshaft seal.......................... 63
Renewing camshaft bearings.................................. 65
Flywheel housing ................................................................................ 71
Removing the flywheel housing............................. 72
Fitting the flywheel housing................................... 72
Fan coupling Removing the fan coupling .................................... 76
Fitting the fan coupling .......................................... 76
Renewing the bearing in the fan coupling.............. 77
Renewing the front crankshaft seal ........................ 80
Closed crankcase ventilation Troubleshooting...................................................... 83
Renewing the diaphragm........................................ 85
Crank mechanism ................................................................................ 86
Removing a piston.................................................. 87
Fitting a piston........................................................ 89
Renewing a piston .................................................. 91
Checking the connecting rod..................................94
Bearing bush in connecting rod.............................. 96
Flywheel Removing the flywheel........................................... 98
Fitting the flywheel................................................. 99
Support bearing .................................................... 101
External ring gear ................................................. 102
Contents
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Scania DC12 Specifications

General

Configuration	Inline 6-cylinder
Bore x Stroke	127 mm x 154 mm
Cooling System	Liquid-cooled
Engine Type	Diesel
Displacement	11.7 liters
Weight	Approx. 1100 kg