Generac Power Systems GN190H - Page 4

SECTION 8: IGNITION SYSTEM ...................... 30-31
GENERAL ...................................................................... 30
MAJOR COMPONENTS .................................................. 30
IGNITION COIL ASSEMBLY.............................................. 30
SPARK PLUG .................................................................. 30
FLYWHEEL ................................................................ 30-31
Checking Flywheel Magnet ........................................ 30
Flywheel Key.............................................................. 30
Flywheel Removal ................................................ 30-31
Flywheel Installation .................................................. 31
TESTING THE IGNITION SYSTEM .................................... 31
SECTION 9: VALVE TRAIN .............................. 32-36
MAJOR COMPONENTS .................................................. 32
DISASSEMBLY .......................................................... 32-33
VALVE SERVICE .............................................................. 33
Valve ..........................................................................33
Valve Seats ................................................................ 33
Valve Guides .............................................................. 34
Valve Tappets ............................................................ 34
Valve Springs.............................................................. 34
INSTALLATION .......................................................... 34-35
ADJUSTING VALVE CLEARANCE .................................... 36
INSTALL ROCKER ARM COVER ........................................36
SECTION 10: PISTON, RINGS AND ROD ........ 38-41
GENERAL ...................................................................... 38
REMOVAL ...................................................................... 38
PISTON .................................................................... 38-39
Removal from Connecting Rod .................................. 38
Check Piston for Wear .......................................... 38-39
PISTON RINGS ................................................................ 39
General...................................................................... 39
Description ................................................................ 39
Ring End Gap........................................................ 39-40
CONNECTING ROD ........................................................ 40
ASSEMBLY AND INSTALLATION ................................ 40-41
Assembly .................................................................. 40
Installation ................................................................ 41
CYLINDER SERVICE ........................................................ 41
Inspection .................................................................. 41
Reboring the Cylinder ................................................ 41
SECTION 11: CRANKSHAFT AND CAMSHAFT 42-45
CAMSHAFT REMOVAL .................................................. 42
Removal of Crankcase Cover...................................... 42
Camshaft Removal .................................................... 42
CRANKSHAFT REMOVAL................................................ 42
CAMSHAFT INSPECTION ................................................ 43
CRANKSHAFT INSPECTION........................................ 43-44
Crankshaft Proper...................................................... 43
Crankshaft Sleeve Bearing.......................................... 44
COMPRESSION RELEASE .......................................... 44-45
CRANKSHAFT INSTALLATION ........................................ 45
CAMSHAFT INSTALLATION ............................................ 45
SECTION 12: LUBRICATION ............................ 46-50
GENERAL ...................................................................... 46
OIL FLOW ...................................................................... 46
OIL PICKUP ASSEMBLY .................................................. 46
Description ................................................................ 46
Inspection .................................................................. 46
OIL PUMP ................................................................ 46-47
Description ................................................................ 46
Inspection .................................................................. 47
CRANKSHAFT OIL SEALS ................................................ 47
PRESSURE RELIEF VALVE ................................................ 48
Description ................................................................ 48
Inspection .................................................................. 48
BREATHER ASSEMBLY .................................................... 48
Description ................................................................ 48
Inspection .................................................................. 48
CRANKCASE COVER ................................................ 48-50
Description .......................................................... 48-49
Inspection .................................................................. 49
Governor Gear Installation ........................................ 49
Crankcase Cover Installation ................................ 49-50
OPTIONAL OIL FILTER...................................................... 49
LOW OIL PRESSURE SYSTEM .................................... 49-50
SECTION 13: TROUBLESHOOTING ................ 52-53
SPECIFICATIONS .............................................. 54-59
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