Check Points Of Every 1500 Hours - Kubota D1503-M-DI Workshop Manual

03-M-DI Series, WSM

(10) Check Points of Every 1500 Hours

CAUTION
• Check the 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.
Fuel Injection Pressure
1. Set the injection nozzle to a nozzle tester (Code No. 07909-
31361).
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
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-32
DIESEL ENGINE
18.6 to 20.1 MPa
190 to 205 kgf/cm
2702 to 2916 psi
W10408820
(b) Bad
W10411400
No fuel leak at
16.67 MPa
2
170 kgf/cm
2418 psi
W10412730
2
2
,
KiSC issued 10, 2009 A