Chapter 5
PERIODIC MAINTENANCE CHART
5-4
Every 8000 ser-
vice hours
Conduct a Major Overhaul
Disassemble engine-clean, check and change major parts.
<Parts to be changed>
Inlet and exhaust valve seats, inlet and exhaust valves, valve rotators, valve
cotters, rocker arm adjusting screws, valve push rods, bridge caps, cam-
shaft 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, rocker bushings, thrust plates, pis-
tons, piston pins, connecting rod bolts, connecting rod bushings, rocker
bushings, etc.
∗
Inspection and Testing of Fuel Injection Pump(Replace parts, if necessary.)
∗
Inspection and Testing of Governor (Replace parts, if necessary.)
∗
Correction or Replacement of Protective Devices
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.
∗
Checking the Auxiliary Devices for Proper Operation
Water heater, oil heater, oil priming pump, fuel transfer pump, governor
motor, etc.
∗
Every 2 years
When required
Inspection and Cleaning Radiator Fins
Cleaning and Inspecting Air Cleaner Element
Cleaning the Inside of the Engine Breathers
∗
Inspecting or Replacing the Stop Solenoid
∗
Inspecting or Replacing the Couplings
∗
Inspecting the Vibration-isolating Rubber
∗
Table 5-1 Periodic Maintenance Chart for Engine in Regular Use (2 / 2)
Service item
Page
Items marked with
∗
require special tools or large equipment. For servicing of these items, consult a Mit-
subishi dealer.