Adjusting Operation; Preliminary Precautions; Adjusting Operation Procedure - Yanmar 3JH4E Service Manual

2.6 Adjusting operation

Perform the adjusting operation (test run) for an
engine as follows after the maintenance job:

2.6.1 Preliminary precautions

Before making a test run, make sure of the
following points.
(1) Warm the engine up.
(2) Remove any precipitation from the fuel
filter. water separator, and fuel tank.
(3) Use only lube oil recommended by
Yanmar.
(4) Be sure to add Long Life Coolant
Antifreeze (LLC) to cooling fresh water.
(5) Provide good ventilation in the engine
room.

2.6.2 Adjusting operation procedure

1) Supply the fuel oil, lubricating oil and coolant.
Note:
Check the levels of the lube oil and coolant
again after test running (for about 10 minutes)
and add as required.
2) Start the engine, and carry out idling at a low
speed (800 to 900 min
3) Run in the engine for about five minutes at the
rated speed (no-load). Check any water, fuel
or lube oil leakage and existence of abnormal
vibration or noise. Also check the oil pressure,
coolant temperature and exhaust gas color.
4) Adjust the no-load minimum and maximum
speed. (Refer to 2.3.)
5) Perform loaded operation as required.
-1
) for a few minutes.
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2. Inspection and adjustment