Kubota WSM GR2100EC Workshop Manual page 89

GR2100EC, WSM
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
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 140 to 130
8. Measure the time needed to decrease the pressure from 13.73
to 12.75 MPa (from 140 to 130
psi).
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 spec.
Fuel tightness of
delivery valve
Allowable limit
A 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-S18
ENGINE
, 1991 psi).
, from 1991 to 1849 psi).
, from 1991 to 1849
10 seconds
13.73 12.75 MPa
140 130
1991 1849 psi
5 seconds
13.73 12.75 MPa
140 130
1991 1849 psi
(3) Protection Cover for Jetted Fuel
0000001361E
KiSC issued 04, 2006 A