OIL PUMP CONSTRUCTION [LF, L5]
id0111c4100600
• 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 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
|
Item
|
Engine speed [rpm]
|
Specification (kPa {kgf/cm2, psi})
|
|
LF
|
L5
|
|
Oil discharge pressure (reference value)
[Oil temperature: 100°C {212°F}]
|
1,500
|
129—269 {1.32—2.74, 18.8—39.0}
|
193—400 {1.97—4.07, 28.0—58.0}
|
|
3,000
|
234—521 {2.39—5.31, 34.0—75.5}
|
395—649 {4.03—6.61, 57.3—94.1}
|
• A silent chain (link connecting type) has been adopted for 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 chain, oil pump sprocket specification
|
Item
|
Specification (mm {in})
|
|
LF
|
L5
|
|
Oil pump chain
|
Pitch size
|
8 {0.3}
|
|
Oil pump sprocket
|
Outer diameter
|
60.79 {2.393}
|
47.96 {1.888}
|
|
Driven tooth width
|
6.15 {0.242}
|
