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SECTION
2
- OPERATING INSTRUCTION
2.5 RUN - IN PROCEDURE AFTER MAJOR OVERHAUL
2-5-01
2.5 RUN-IN PROCEDURE AFTER MAJOR OVERHAUL
Run-in procedures should be conducted after installing new pistons, rings, or
cylinder liners. No run-in is required if only the main and/or rod bearings were
replaced.
The run-in can be completed in a few hours of running time and helps insure
proper "seating" of the wearing parts. The recommended schedule is as follows:
(all running is at a NO-LOAD condition).
・
Start the engine and run at low idle no-load for a period of about ten minutes.
Stop the engine.
DANGER
Where the engine is brought to a stop due to abnormal heat generation being
detected inside the engine room, there is a danger of explosion if crankcase
door is allowed to open forthwith.
Open the door after the lapse of a cooling period of not less than 20
minutes.
・
If new main and/or rod bearings were installed during the overhaul, remove
a crankcase inspection cover and carefully check by "feel" for high
temperatures on the main and rod bearing caps. If no problems are seen,
reinstall the covers.
・
Remove a valve cover and check by "feel" for unusually high operating
temperatures that would indicate inadequate oil supply. Reinstall the cover.
・
Restart the engine and run the following schedule:
ENGINE SPEED(%)
RUNNING TIME
TOTAL TIME
50
20min
20min
60
20min
40min
70
20min
1 HR
80
20min
1 HR 20min
90
20min
1 HR 40min
100
30min
2 HR 10min
INSPECTION OF CRANKCASE INSIDE
Cation 1: Engine speed(%) means the rate of the rated speed.
2: Tortional vibration range has to be prohibited smoothly.
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