- 48 -
8
93
91
92
94
Dyno testing of engine
After you have placed the engine on the brake (fig.94) perform
the following:
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.
Checking for oil leaks
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.
Checking oil pressure
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.
Speed adjustment (fig.91)
When the engine is hot set idle speed at 1000 rpm and
maximum no-load speed at:
ENGINE TESTING
KD425-2 Workshop Manual_cod. ED0053031750_
1° ed
_ rev.
00
3750 rpm
for engines at 3600 rpm
Summary of Contents for KD425-2
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