39
Maintenance schedule
2
nd
major overhaul
Disassemble engine, clean, check and change major parts.
Major parts:
Inlet and exhaust valve seats
Inlet and exhaust valves
Valve rotators
Valve cotters
Rocker arm adjusting screws
Valve push rods
Bridge caps
Camshaft bushings
Camshaft expansion plugs
Cylinder head bolts
Valve guides
Valve bridge guides
Valve bridges
Valve springs
Tappets
Camshaft thrust plates
Main bearings
Cylinder liners
Main bearing cap bolts and washers
Piston rings
Connecting rod bearings
Vibration damper
Air duct rubber hoses
Cooling water rubber hoses
Consumable items (gaskets, oil seals, o-rings, etc.)
Rocker bushings
Thrust plate crankshaft
Pistons and piston pins
Connecting rod bolts
Connecting rod bushings etc.
Check high-pressure fuel injection pump and fuel
supply pump
Change torsional vibration damper
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Summary of Contents for D49A MS
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