OIL PUMP CONSTRUCTION[L3]
id0111a1100600
• The oil pump is installed inside the engine front cover. The crankshaft drives the inner rotor through the oil pump chain and oil pump sprocket.
• The oil pump component consists of the oil pump body, oil pump sprocket, oil pump chain, oil pump chain guide, and oil pump chain tensioner.
• A trochoid gear has been adopted on the oil pump.
• The oil pump consists of the inner and outer rotors, relief valve, and oil pump body.
• The oil pump cannot be disassembled. If there is an oil pump malfunction, replace it as a single unit.
Oil pump specification
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Item
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Engine speed [rpm]
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Specification (kPa {kgf/cm2, psi})
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Oil discharge pressure (reference value)
[Oil temperature: 100 °C {212 °F}]
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1,500
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180— 387 {1.84—3.95, 26.2—56.1}
|
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3,000
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337—591 {3.44—6.03, 49.0—85.8}
|
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Relief valve opening pressure (reference value)
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420—520 {4.28—5.30, 60.9—75.4}
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• A silent chain (link connecting type) has been adopted to the oil pump chain to reduce chain operation noise when the chain and the sprocket engage.
• The engine oil in the engine front cover lubricates the oil pump chain. Wear resistance has been improved using nitriding processing of the pins constructing the oil pump chain.
• The sintered material in the oil pump sprocket has been furnace hardened to improve durability.
Oil pump driven chain, oil pump sprocket specification
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Item
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Specification (mm {in})
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Oil pump driven chain
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Pitch size
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6.35 {0.25}
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Oil pump sprocket
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Outer diameter
|
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46.46 {1.829}
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Driven tooth width
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5.7 {0.23}
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