Injection Nozzle - Kubota D1503-M-DI Workshop Manual

03-M-DI Series, WSM

(2) Injection Nozzle

CAUTION
• Check the nozzle injection pressure and condition after confirming that there is nobody standing in the
direction the fume goes. If the fume from the nozzle directly contacts the human body, cells may be
destroyed and blood poisoning may be caused.
Nozzle Injection Pressure
1. Set the injection nozzle to the nozzle tester.
2. Slowly move the tester handle to measure the pressure at which
fuel begins jetting out from the nozzle.
3. If the measurement is not within the factory specifications,
replace the injection nozzle assembly.
Fuel injection pressure
Factory spec.
1st. stage
(1) Adjusting Washer
Nozzle Spraying Condition
1. Set the injection nozzle to a nozzle tester (Code No. 07909-
31361), and check the nozzle spraying condition.
2. If the spraying condition is defective, replace the injection nozzle
assembly.
(a) Good
Valve Seat Tightness
1. Set the injection nozzle to a nozzle tester (Code No. 07909-
31361).
2. Raise the fuel pressure, and keep at 16.67 MPa (170 kgf/cm
2418 psi) for 10 seconds.
3. If any fuel leak is found, replace the injection nozzle assembly.
Valve seat tightness Factory spec.
S-88
DIESEL ENGINE
18.6 to 20.1 MPa
190 to 205 kgf/cm
2702 to 2916 psi
W1037197
(b) Bad
W1037394
No fuel leak at
16.67 MPa
2
170 kgf/cm
2418 psi
W1088949
2
2
,
KiSC issued 10, 2009 A