Chapter 5 PERIODIC MAINTENANCE CHART
5-17
Every 24000
service
hours
Major overhaul (complete disassembly and inspection)
Change all O-rings, gaskets and seals.
½
Cylinder
Heads and
Valve
Mecha-
nisms
Change inlet and exhaust valves, valve seats, valve guides, valve
rotators and valve cotters.
Inspect and change pushrods, rocker arm bushings, valve springs,
tappet rollers, tappet roller bushings, tappet shafts, tappet guides
and tappet guide set screws.
Cylinder liners Change.
Main bearing
Inspect main bearing caps and bolts, and change
main bearings.
Cam bushings
Inspect and change (in 2nd 24000-service-hour-
interval inspection and maintenance).
Pistons
Disassemble and inspect piston crown, and
change O-rings.
Connecting rods
Change connecting rod bolts and small-end
bushings.
Crankshaft Inspect journals and pins, and change slingers.
Damper
Change (in 2nd 24000-service-hour-interval
inspection and maintenance).
Spring coupling
Disassemble and maintain (by spring coupling
manufacturer).
Timing gear
and front
gear
All shafts Inspect.
Rear idler gear
Inspect and change rear idler gear assemblies
(including bushings).
Change front idler bearing, camshaft roller bearing, front seal, rear
seal, front gear case gasket and rear gear case gasket.
Fuel system
Fuel injection
nozzles
Change nozzle holder assemblies.
Fuel injection
pump
Change plunger assembly and delivery valve.
Fuel feed pump Change pump assembly.
Regulator valve Change.
Lubricating
system
Oil pump Change safety valve and spring.
Oil thermostat Change.
Oil pan Clean and change gasket.
Engine oil regu-
lator valve
Inspect and change.
Cooling
system
Water pump Change shaft and impeller.
Coolant ther-
mostat
Change.
Inlet and
exhaust
systems
Air cooler
Change element (in 2nd 24000-service--hour-
interval inspection and maintenance).
Exhaust pipes Inspect and change bellows.
Exhaust duct Change seal rings.
Governor
Actuator
Disassemble and maintain (by governor manu-
facturer).
Governor case Change bearings, O-rings and gaskets.
Control shaft Change oil seals.
Table 5-3 Periodic maintenance chart for general-purpose power supply engine (5 / 5)
Service
interval
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