Yanmar 4JH4E - Lube Oil Pump; Lube Oil Pump Construction; Specifications of Lube Oil Pump

8. Lubrication system
253
8.2 Lube oil pump
8.2.1 Lube oil pump construction
The trochoid type lube oil pump is mounted in the gear case, and the inner rotor is driven by the
crankshaft.
The lube oil flows from the intake filter mounted on the bottom of the cylinder block through the holes in
the cylinder block and engine plate, and out from the holes in the engine plate and cylinder block to the
discharge filter.
The lube oil pump is fitted with a control valve, which controls the discharge pressure.
8.2.2 Specifications of lube oil pump
Lube oil pump specifications
3JH4/4JH4E 4JH4-TE/4JH4-HTE
Engine speed
min
-1
3000 800 3200 800
Delivery quantity (L/min) º17.5 º8.0 º17.5 º8.0
Delivery pressure
MPa
(kgf/cm
2
)
0.39-0.54
(4.0-5.5)
º0.06
(0.6)
0.28-0.45
(2.9-4.6)
º0.06
(0.6)
Oil temp. (Oil pan) (°C) ¹115 II I
Outer rotor
Inner rotor
Control valve
Crankshaft
Pump cover
Gear case
Plug
010648-00E
Pump cover
Control valve
Outer rotor
Inner rotor
Crank gear
010543-00E
3JH4E and 4JH4E
4JH4-TE and 4JH4-HTE