Kubota B1220 Workshop Manual page 85

B1220, B1620, B1820, WSM
Fuel Tightness of Pump Element
1. Remove the engine stop solenoid.
2. Remove the injection pipes and glow plugs.
3. Install the injection pump pressure tester to the injection pump.
4. Install the injection nozzle (1) jetted with the proper injection
pressure to the injection pump pressure tester (2). (Refer to the
photo.)
5. Set the speed control lever to the maximum speed position.
6. Run the starter to increase the pressure.
7. If the pressure can not reach the allowable limit, replace the
pump with new one or repair with a KUBOTA-authorized pump
service shop.
Fuel tightness of pump
Allowable limit
element
NOTE
• Never try to disassemble the injection pump assembly. For
repairs, you are strongly requested to contact a
KUBOTA-authorized pump service shop.
(1) Injection Nozzle
(2) Injection Pump Pressure Tester
Fuel Tightness of Delivery Valve
1. Remove the engine stop solenoid.
2. Remove the injection pipes and glow plugs.
3. Set a pressure tester to the fuel injection pump.
4. Install the injection nozzle (1) jetted with the proper injection
pressure to the injection pump pressure tester (2).
5. Run the starter to increase the pressure.
6. Stop the starter when the fuel jets from the injection nozzle.
After that, turn the flywheel by the hand and raise the pressure
to approx. 13.73 MPa (140.0 kgf/cm
7. Now turn the flywheel back about half a turn (to keep the plunger
free). Maintain the flywheel at this position and clock the time
taken for the pressure to drop from 13.73 to 12.75 MPa (from
2
140.0 to 130.0 kgf/cm
8. Measure the time needed to decrease the pressure from 13.73
to 12.75 MPa (140.0 to 130.0 kgf/cm
9. If the measurement is less than allowable limit, replace the
pump with new one or repair with a KUBOTA-authorized pump
service shop.
Factory specification
Fuel tightness of delivery
valve
Allowable limit
NOTE
• Never try to disassemble the injection pump assembly. For
repairs, you are strongly requested to contact a
KUBOTA-authorized pump service shop.
(1) Injection Nozzle
(2) Injection Pump Pressure Tester
1-S16
13.7 MPa
140 kgf/cm
1991 psi
(3) Protection Cover for Jetted Fuel
9Y1210272ENS0023US0
2
, 1991 psi).
, from 1991 to 1849 psi).
2
, 1991 to 1849 psi).
10 seconds
13.73 → 12.75 MPa
140.0 → 130.0 kgf/cm
1991 → 1849 psi
5 seconds
13.73 → 12.75 MPa
140.0 → 130.0 kgf/cm
1991 → 1849 psi
(3) Protection Cover for Jetted Fuel
9Y1210272ENS0024US0
ENGINE
2
2
2
(EU)
KiSC issued 07, 2011 A