Kubota D1803-CR-E4 User Manual

3.13.4 Specification of injector
Operating voltage 110 V
Operating pressure range
30.0 to 160 MPa
306 to 1630 kgf/cm
2
4360 to 23200 psi
Number of injection
holes
D1803-CR-E4, TE4,
V2403-CR-E4, TE4,
TE4BG
7
D1803-CR-TIE4,
V2403-CR-TIE4
8
QR correction points 4
3.14 Overflow pipe
3.14.1 Outline of overflow pipe
The overflow pipe is a path for returning excess fuel
after injection to the tank.
3.14.2 Structure of overflow pipe
The overflow pipe is made up of two pipes, the return
from
the
injectors and the return from the supply pump
and rail.
(1) Overflow hose (2) Overflow pipe
3.14.3 Function of overflow pipe
The overflow
pipe is a path for returning excess fuel
after injection to the tank.
3.15 Check valve
3.15.1 Outline of check valve
The check valve prevents reverse flow of fuel inside the
fuel piping.
3.15.2 Structure of check valve
There are two types of check valves, with or without a
regulator.
(A) No regulator (B) Regulator included
3.15.3 Function of check valve
The check valve prevents reverse flow of fuel inside the
fuel piping.
The check valve is being used as a no-return valve.
A
check
valve without a regulator is used in the return
path from the fuel filter.
This path is used as a return path for excess fuel and
for air bleeding.
A check valve with a regulator is used in the return path
from the overflow pipe.
This is to retain back pressure inside the return path
from the overflow pipe.
3.15.4 Specification of check valve
Valve opening pres-
sure
Regulator included
11 kPa
0.11 kgf/cm
2
1.6 psi
3.16 Fuel cooler
3.16.1 Outline of fuel cooler
The fuel cooler cools fuel returning from the engine.
Cooling
fuel
returning to the fuel tank prevents
temperature increase of the fuel in the fuel tank.
MECHANISM
3. Fuel system 4. ENGINE
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
4-29
KiSC issued 12, 2018 A

Kubota D1803-CR-E4 Specifications

General

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