Kubota WSM F2880 Workshop Manual page 83

F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM
CAUTION
• Check the nozzle injection pressure and condition after confirming that there is nobody standing in the
direction of the fuel spray. If the spray from the nozzle directly contacts the human body, cells may be
destroyed and blood poisoning may be caused.
Nozzle Pattern
1. Set the injection nozzle to a nozzle tester, and check the nozzle
pattern.
2. If the pattern is defective, replace the nozzle piece.
(a) Good
Fuel Injection Pressure
1. Install the injection nozzle to a 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 adjusting washer (1) in the nozzle holder to adjust it.
Fuel injection pressure Factory spec.
(Reference)
• Pressure variation with 0.01 mm (0.0004 in.) difference of
adjusting washer thickness.
Approx. 235 kPa (2.4 kgf/cm
(1) Adjusting Washer
Valve Seat Tightness
1. Set the injection nozzle to a nozzle tester.
2. Raise the fuel pressure, and keep at 12.75 MPa (130 kgf/cm
1849 psi) for 10 seconds.
3. If any fuel leak is found, replace the nozzle piece.
Valve seat tightness Factory spec.
1-S17
(b) Bad
13.73 to 14.71 MPa
140 to 150 kgf/cm
1991 to 2134 psi
2
, 34 psi)
No fuel leak at
12.75 MPa
2
130 kgf/cm
1849 psi
KiSC issued 04, 2006 A
ENGINE
W10181310
2
W10182100
2
,
W10183690