Engine Testing; Speed Adjustment; Checking Oil Pressure; Checking For Oil Leaks - Kohler LOMBARDINI 25 LD Workshop Manual

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91
92
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ENGINE TESTING

Speed adjustment (fig.91)
When the engine is hot set idle speed at 1000 rpm and
maximum no-load speed at:
3150 rpm
3750 rpm

Checking oil pressure

Checking for oil leaks

Dyno testing of engine

After you have placed the engine on the brake (fig.94) perform
the following:
25 LD 330-2_425-2 Workshop Manual_cod. ED0053031690_1° ed_ rev. 00
for engines at 3000 rpm
for engines at 3600 rpm
1. Remove the bolt from the hole in the crankcase and fit a
pressure gauge with 0 to 10 kg/cm² full scale (fig.92)
2. Start the engine, accelerate to 3000 rpm and wait for the oil
to reach a temperature of 70 to 80°C.
3.The pressure reading must be between 2.5 and 4 kg/cm².
4. Reduce engine speed to minimum; the pressure should not
fall below 1 ÷ 1.5 Kg/cm² with oil temperature of 80°C.
1. Remove the exhaust gas collection pipe from the inlet
manifold and close the connection with a plug (fig.93).
2. Start the engine and let it run for a few minutes. The high
pressure generated in the crankcase will show up any oil
leaks.
3. Reconnect the exhaust gas collection pipe to the inlet
manifold.
1. Check the oil level (fig.95).
2. Start the engine and let it idle.
3. Check the oil pressure on the pressure gauge (fig.92)
4. Run in engine before testing it at full power.