7-4
Chapter 7 MAINTENANCE SCHEDULE
Items marked with * in the maintenance schedule require special tools or large equipment. For the servicing of
those items, contact your Mitsubishi dealer.
Every 8000 service hours
Engine - Major overhaul
Disassemble engine, clean, check and change major parts.
[Parts to be changed]
Inlet and exhaust valves, inlet and exhaust valve seats, valve rotators, valve
cotters, rocker arm adjusting screws, valve push rods, bridge caps, camshaft
bushings, camshaft expansion plugs, main bearings, cylinder liners, main
bearing cap bolts and washers, piston rings, connecting rod bearings,
damper, crankcase thrust plate and consumable items (gaskets, oil seals, O-
rings, etc.)
[In second overhaul, replace the following parts in addition to the parts listed
above]
Cylinder head bolts, valve guides, valve bridge guides, valve bridges, valve
springs, tappets, camshaft thrust plates, pistons, piston pins, connecting rod
bolts, connecting rod bushings, rocker bushings, fuel pipe assembly, oil pipe
assembly
*
Fuel injection pump - Inspect and Test (Replace parts as necessary) *
Governor - Inspect and Test (Replace parts as necessary) *
Protective Devices - Repair or Replace
High coolant temperature, low oil pressure, overspeeding, starting failure,
water supply failure, undervoltage, overvoltage, overcurrent, low coolant
level in tank, low fuel level in tank, low air pressure in tank, etc.
*
Auxiliary devices operation - Check
Water heater, oil heater, oil priming pump, fuel transfer pump, governor
motor, etc.
*
Every 8000 service hours
or every 2 years
Coolant - Change 8-13
As required
Fuel system - Bleed air 3-2
Radiator fins - Check and Clean 8-14
Pre-cleaner - Clean, Inspect and Replace 8-16
Air cleaner element - Clean, Check and Replace 8-17
Cleaning the Inside of the Engine Breathers *
Stop solenoid - Inspect or Replace *
Couplings - Inspect or Replace *
Inspecting the Vibration-isolating Rubber *
Table 7-1 Periodic maintenance chart for regular use engine
Interval and Service item Page
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