Kohler KD 625/3 Workshop Manual page 4

Chapter index
Cylinder Head ....................................................................................................................................................................31
Valves ................................................................................................................................................................................31
Valve stem sealing rings - Reassembly ........................................................................................................................... 32
Valve springs..................................................................................................................................................................... 32
Valve material .................................................................................................................................................................. 32
Valve guides and cylinder head housings ........................................................................................................................ 32
Valve guide insertion ........................................................................................................................................................ 33
Dimensions and clearance between guides and valves ................................................................................................. 33
Valve seats and housings ................................................................................................................................................. 33
Valve seat lapping ............................................................................................................................................................. 33
Pushrod tube spring fitting ................................................................................................................................................ 34
Cylinder ............................................................................................................................................................................. 34
Checks and cyiinder roughness ....................................................................................................................................... 34
Piston ................................................................................................................................................................................ 34
Piston weight ..................................................................................................................................................................... 35
Metal snap rings - End gaps ........................................................................................................................................... 35
Metal snap rings - Piston grooves .................................................................................................................................. 35
Metal snap rings - Fitting sequence ................................................................................................................................. 35
Piston - Refitting ............................................................................................................................................................... 36
Piston clearance ............................................................................................................................................................... 36
Connecting rod ................................................................................................................................................................. 36
Connecting rod small end bearing and pin ....................................................................................................................... 37
Connecting rod alignment ................................................................................................................................................. 37
Connecting rod weight ...................................................................................................................................................... 37
Connecting rod big end bearing ....................................................................................................................................... 37
Camshaft gear .................................................................................................................................................................. 38
Oil pump gear ................................................................................................................................................................... 38
Timing gear ....................................................................................................................................................................... 38
Main bearing support, gear side ...................................................................................................................................... 38
Main bearing support, flywheel side ................................................................................................................................. 39
Crankshaft ......................................................................................................................................................................... 39
Center main bearing support, locating bolts ..................................................................................................................... 39
Crankshaft removal ........................................................................................................................................................... 39
Crankshaft center main bearing supports ........................................................................................................................ 39
Crankshaft lubrication ducts ............................................................................................................................................. 40
Crankshaft journal radius .................................................................................................................................................. 40
Checking main journals and crank pins ............................................................................................................................ 40
Main journal and crank pin diameter ............................................................................................................................... 40
Diameter of main bearings .................................................................................................................................................41
Main bearing and connecting rod big end bearing inside diameter ..................................................................................41
Clearance between main journals/crank pins and connecting rod bearings ....................................................................41
Main bearing supports .......................................................................................................................................................41
Main bearing housings .......................................................................................................................................................42
Crankshaft end play ...........................................................................................................................................................42
Camshaft ............................................................................................................................................................................42
Camshaft removal ..............................................................................................................................................................42
How to measure camshaft bearing and journal inside diameter .......................................................................................42
Dimensions of camshaft journals and housings ............................................................................................................... 43
Checking intake/exhaust cam height ................................................................................................................................ 43
Intake/exhaust cam height ................................................................................................................................................ 43
Camshaft end play ............................................................................................................................................................ 43
Camshaft timing ................................................................................................................................................................ 44
Valve timing without considering timing marks ................................................................................................................. 44
Valve timing check ............................................................................................................................................................ 44
Hydraulic pump p.t.o. group 1 ........................................................................................................................................... 46
Hydraulic pump 3rd p.t.o., group 2 .................................................................................................................................... 46
Hydraulic pump 4th p.t.o., group 1 ................................................................................................................................... 46
Use of 3rd and 4th p.t.o. ................................................................................................................................................... 46
Mechanical speed governor ..............................................................................................................................................47
Mechanical speed governor components (standard) ........................................................................................................47
Mechanical speed governor operation (standard) .............................................................................................................47
Mechanical speed governor components for special generating sets ............................................................................. 48
Mechanical speed governor setting .................................................................................................................................. 48
Spring for extra fuel supply at starting ............................................................................................................................. 48
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KD Workshop Manual_cod. ED0053029350_1° ed_ rev. 00