Kubota D650-B Handbuch Seite 160

COl9F030
o
8
Checking Shape of Fumes Across Nozzle Tip
1) Set the nozzle to a nozzle tester and shoot it in the air.
Check the shape of the fumes.
2) If the shape is defective, replace the nozzle piece.
III Good
12)
Bad
e
Checking Fuel Tightness of Pump Element
1) Set a pressure tester to the fuel injection pump.
2) Rotate the flywheel to increase the pressure to 39.23MPa
(400 kgf/cm
2
,
5689 psi).
3) Align the plunger with the top dead center.
4) Measure the time needed to decrease the pressure from
39.23 to 34.32 MPa (from 400 to 350 kgf/cm
2
,
from
5689 to 4978 psi).
5) If the measurement is less than allowable limit, replace
the pump element or the injection pump assembly.
l
1---- -
~ R~'''": l[~~.~e~~~:~r3~~;~
MPa
j
I
Fuel tightness of value
~~~:g:{~~~9;~;~'
kgf/emz
pump element
r----
30 seconds- - - ­
I
Allowable
I
[39.23 MPa
->
34.32 MPa ]
limit 400 kgf/cm'
-+
350 kgf/em z
___ __
568~
psi ....
4~~8.J:Si.
_ _ _
• Important:
• After replaCing the pump element, be sure to adjust
amount of fuel injection using a pump tester and a test
bench [DIESEL KI KI CO. LTD: Code No. 105760-0010
(for 50Hz) or 105760-0020 (for 60Hz)
1.
{Test Conditions]
[120 kgf /em' • 1707
x 2 mm dia. x 600 mm long
• 0.24 in. dia.
x
0.08 in. dia.
x
23.62 in. long
~-------r-
Fuel feed pressure, 49 kPa [0.5 kgf/cmz, 7 psi]
- ­ ' - ---'---:....
:~'----.---____l
Test fuel • Diesel fuel No. 2·0
2.15 to 2.25 mm, 0.0846 to 0.0886 in.
PFK·T·OO
[Adjustment Reference Data]
3mm
35 mm 11
-----'----~
21 mm
28mm (1
Control raek Amount of
Speed
position Imm) fuel (CC/l00st) Ir.p.m.)
_._-­
r -
a + 2 1400 2.21 to 2.55
a 1400 1.52 to 1.58
I----­
a 1 1400 0.95 to 1.35
I - - ­
•
400
a
1 0.45 to 0.77
....
- - - - - - _
...
164
I