Checking Fuel Injection Pressure; Checking Nozzle Valve Seat Tightness - Kubota WSM 05-E4B Series Workshop Manual

4. ENGINE
• If the fume from the nozzle directly contacts the
human body, cells may be destroyed and blood
poisoning may be caused.
1. Set the injection nozzle to the nozzle tester.
2. Check the nozzle spraying condition.
NOTE
• If the spraying condition is damaged,
replace the nozzle piece.
(1) Good
4.13 Checking fuel injection
pressure
CAUTION
• Check the injection pressure and condition,
after you make sure that there is nobody
standing in the direction the fume goes.
• If the fume from the nozzle directly contacts a
human body, the fume might destroy cells of a
human body and cause blood poisoning.
Tools required
• Nozzle tester
1. Set the injection nozzle to the nozzle tester.
4-24
(2) Bad
2. Slowly move the nozzle tester's handle to measure
the pressure at which the fuel begins to jet out from
the injection nozzle.
NOTE
• If the measurement is not within the service
specification, replace the adjusting washer
(1) in the nozzle holder to adjust.
• Pressure changes
2
(6.02 kgf/cm , 85.6 psi) for every 0.025mm
(0.00098 in.) change in thickness of washers.
Fuel injection pres- Service specifi-
sure cation
(1) Adjusting washer
4.14 Checking nozzle valve seat
tightness
CAUTION
• Check the injection pressure and condition after
you make sure 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.
SERVICING
4. Checking and adjusting
approx. 590 kPa
13.7 to 14.7 MPa
2
140 to 149 kgf/cm
1990 to 2130 psi
05-E4B SERIES,05-E4BG SERIES
KiSC issued 03, 2023 A