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Mitsubishi S12U User Manual

Mitsubishi S12U
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Chapter 5 PERIODIC MAINTENANCE CHART
5-11
Every 4
years
Fuel system
Fuel injection
nozzles
Change nozzle tips and adjust pressure.
½
Fuel injection pump
Disassemble, maintain, adjust and change
O-rings.
Fuel tank Clean inside.
Lubricating
system
Oil pump Inspect discoloration and external.
Oil cooler Inspect and clean element.
Breather
Clean mist separator and change expend-
able parts.
Governor oil filter Change.
Cooling
system
Coolant thermostat Change.
Inlet and
exhaust
systems
Turbocharger
Remove carbons, change seal rings and
change expendable parts.
Air cooler Disassemble and clean element.
Pre-cleaner Change.
6-16
Air cleaner element Change. 6-17
Every 8
years
Major overhaul (complete disassembly and inspection)
Change all O-rings, gaskets and seals.
½
Cylinder
heads and
valve mech-
anisms
Disassemble and maintain, clean and change expendable parts.
Inlet and exhaust
valves and valve
seats
Inspect, regrind and lap.
Valve guides, valve
rotators, valve cot-
ters, pushrods,
rocker arm bush-
ings, valve springs,
tappet rollers, tap-
pet roller bushings,
tappet shafts, tap-
pet guides and tap-
pet guide set
screws
Inspect.
Stem seal Change.
Copper tubes and
copper tube O-rings
Change.
Safety valves Inspect and change expendable parts.
Cylinder liners Inspect, clean and change O-rings.
Main bearings
Inspect main bearing caps, bolts and main
bearings, and inspect thrust plate.
Cam bushings Inspect.
Pistons Inspect including overhaul and clean.
Piston rings Change.
Connecting rods
Inspect bolts, inspect Magnaflux serrations,
change big-end bearing shells and inspect
small-end bushings.
Front gear and timing gear
Inspect gear teeth, bearings and shafts.
Change front seal, rear seal, front gear
case gasket and rear gear case gasket.
Table 5-2 Periodic maintenance chart for emergency engine (4 / 5)
Service
interval
Service item Service contents Page

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Mitsubishi S12U Specifications

General IconGeneral
BrandMitsubishi
ModelS12U
CategoryEngine
LanguageEnglish

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