Engine Testing; Speed Adjustment; Checking Oil Pressure; Checking For Oil Leaks - Kohler KD 477-2 Workshop Manual

XIV

ENGINE TESTING

88
89
90
91
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Speed adjustment

1. With engine hot set minimum speed at 1000 RPM (fig. 88) and
maximum to idle (fig. 89) at:
3150 RPM for engines at 3000 rpm
3750 RPM
for engines at 3600 rpm
2. Then stop the engine.
3. Remove injectors, clean nozzle holes carefully, check setting and
re-fit.
4. Adjust clearance between valves and rockers, while engine is
hot, to:
5. Re-fit rocker covers and sealing gaskets.

Checking oil pressure

1. Remove union from rocker oil hole and fit a pressure gauge gra-
ded from 0 to 8 kg/cm² (fig. 90).
2. Start engine and run up to 3000 RPM. Wait for the oil temperatu-
re to reach 70 to 80°C.
3. With engine idling at 3000 RPM the pressure gauge needle
should be slightly over half way corresponding to a pressure of 3
to 4 kg/cm².
Said pressure will stabilize at 2 to 3 kg/cm² when engine runs at
full load and the oil temperature exceeds 70 to 80°C.
4. Reduce revs to minimum. The pressure should not fall to under 1
kg/cm² with the oil temperature exceeding 80°C.

Checking for oil leaks

1. Remove exhaust gas collection pipe from suction manifold and
close with a plug (fig. 91).
2. Start engine and run for a few minutes. The pressure which
forms inside the crankcase bring out any oil leaks.
3. Re-fit gas collection pipe to suction manifold.
KD 477-2 Workshop Manual_cod. ED0053029370_1° ed_ rev. 00
0,15 mm
intake/exhaust