Kohler SFGLD480 Operation & Maintenance Manual page 91

1. INTRODUCTION
The purpose of the engine lubrication system is to:
Provide pressurised oil for hydrodynamic lubrication, minimizing friction between parts moving in relation to
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each other (crankshaft, connecting rods, etc.).
Regulate the oil pressure so as to ensure correct lubrication.
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Filter oil adequately in order to maintain its lubricating properties.
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Cool the engine.
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Protect the engine parts, like the filters, seals, etc., against oil overpressure by means of relief valves.
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2. DESCRIPTION
The lubricating system comprises the following elements:
Wet oil sump, suction tube and oil level indicator.
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Geared oil pump with overpressure safety valve.
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Lube oil pressure regulating valve.
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Oil temperature thermostatic regulation.
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Oil cooler.
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Clogged filter valve.
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Safety oil pressure switch.
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Oil filters.
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Jet pressure regulation valve.
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Centrifugal filter (diesel, biogas, low methane number gases and propane engines).
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Blow-by gas exhaust system: crankcase breathers.
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2.1. OIL SUMP
An oil sump or oil tank encloses the bottom of the crankcase. The amount of oil it contains depends on the engine
model. A threaded drain plug is fitted to the lowest point in the sump.
Located in the crankcase is the oil suction tube which is fitted with a grille, preventing the suction of foreign
material into the oil circuit.
The dipstick, which allows visual control of the oil level, is also located in the sump.
2.2. OIL PUMP
This is a gear type positive displacement pump driven through the timing gears, which ensures the pump
operates when the engine is running.
It is the oil pump function to supply oil to the other components of the engine. The pump consists of: a pump
body, cover or suction hood, two gears (a driving gear and an idler gear), and an overpressure safety valve.
PRODUCT INFORMATION
IC-C-D-25-005e
DESCRIPTION OF LUBRICATION SYSTEM
2.3.1
INDEX
C
February 2012
FOR "V" ENGINES
Overpressure safety valve
DATE
Dep. 2
O&M_2.002211.810_A_10_2016
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