OIL PUMP CONSTRUCTION [LF, L3]
id0111001006b5
• 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 consists of the oil pump sprocket, oil pump chain, oil pump chain guide, oil pump chain tensioner, and oil pump chain tensioner spring.
• An efficient and compact 5-lobe epitrochoid and 6-flank inner envelop type has have 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 unit.
Oil pump specification
|
ITEM
|
ENGINE SPEED [rpm]
|
LF
|
L3
|
|
Oil discharge pressure
(approximate quantity)
[oil temperature: 100°C {212°F}]
|
(kPa {kgf/cm2, psi})
|
1,500
|
129- 269
{1.32-2.74, 18.7-39.0}
|
193-400
{1.97-4.07, 27.9-58.0}
|
|
3,000
|
234-521
{2.39-5.31, 33.9-75.5}
|
395- 649
{4.03-6.61, 57.3-94.1}
|
|
Relief valve opening pressure
(approximate quantity)
|
(kPa {kgf/cm2, psi})
|
450-550
{4.59-5.61, 65.3-79.8}
|
500-600
{5.09-6.11, 72.6-87.0}
|
• A silent chain (link connecting type) has been adopted on 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. The wear resistance has been improved by nitriding processing of the pin constructing the oil pump chain.
Oil pump driven chain specification
|
ITEM
|
LF
|
L3
|
|
Pitch size
|
(mm {in})
|
8 {0.4}
|
6.35 {0.25}
|
|
Number of pitches
|
|
54
|
66
|
• The oil pump sprocket is heat forged from sintered metals to improve durability.
Oil pump sprocket specification
|
ITEM
|
LF
|
L3
|
|
Outer diameter
|
(mm {in})
|
60.78 {2.394}
|
46.46 {1.829}
|
|
Drive tooth width
|
(mm {in})
|
6.15 {0.242}
|
5.7 {0.23}
|
