Kubota D1803-CR-E4 User Manual

6.6 Oil pump
6.6.1 Outline of oil pump
The oil pump feeds suctioned oil to various parts.
6.6.2 Structure of oil pump
The oil pump is made up of a body, inner rotor, and
outer rotor etc.
(1) Body
(2) Inner rotor
(3) Outer rotor
(4) Inlet port
(5) Outlet port
6.6.3 Function of oil pump
(1) Inlet port (2) Outlet port
1. This
figure is an illustration as viewed from the
flywheel side.
2.
The oil pump is driven by the crankshaft via an oil
pump drive gear.
3. Engine oil is suctioned into the pump through the
pump inlet port (1).
4. Engine oil inside the pump is compressed by
volumetric change based on rotation of the inner
rotor.
5. Compressed engine oil is sent from the pump outlet
port (2) to the sliding parts of various components.
6.6.4 Specification of oil pump
Item Specification
Pump type Trochoid
Number of teeth
Inner rotor 4
Outer rotor 5
Theoretical discharge volume
(Conditions are that oil temperature is
80 ℃ (176 ℉), and used oil is SAE 10W-30)
10 L/min or more
(at 1000 min
-1
)
24.3 L/min or more
(at 2000 min
-1
)
6.7 Relief valve
6.7.1 Outline of relief valve
The relief valve automatically opens at its set pressure
and lowers oil pressure.
6.7.2 Structure of relief valve
The relief valve prevents the damage of the lubricating
system due to high oil pressure.
The relief valve is made up of a spring and ball etc.
(1) Valve seat
(2) Ball
(3) Spring
4. ENGINE
MECHANISM
6. Lubricating system
4-56
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
KiSC issued 12, 2018 A

Kubota D1803-CR-E4 Specifications

General

Brand	Kubota
Model	D1803-CR-E4
Category	Engine
Language	English