ENGINE
b. Injection Nozzle
CAUTION :
• Never contact with spraying diesel fuel under
pressure, which can have sufficient force to
penetrate the skin, causing serious personal injury.
• Be sure nobody is in direction of the spray.
( A ) Fuel Injection Pressure
1. Set the injection nozzle to the nozzle tester.
2. Measure the injection pressure.
3. If the measurement is not within the factory
specifications, adjust with the adjustment washer
(1) inside the nozzle holder.
( R e f e r e n c e )
Pressure variation with 0.1mm(0.004in) difference of
adjusting washer thickness is approx. 10kgf/
cm2
.
(B) Fuel Tightness of Needle Valve Seat Ti g h t n e s s
1. Set the injection nozzle to the nozzle tester.
2. Apply a pressure 130 kgf/
c m2
( 1 2 . 7 5 M p a ,
1849psi). After keeping the nozzle under this
pressure for 10 seconds. Check to see if fuel leaks
from the nozzle.
3. If the fuel should leak, replace the nozzle.
Fuel
23.44Mpa
Factory
injection
150kgf/cm2
spec.
pressure
3400psi
91Mpa
Pressure
Allowable
10kgf/cm2
drop
limit
142psi
Fuel
22.41 to 23.44Mpa
Factory
injection
228.5 to 239.0kgf/cm2
spec.
pressure
3250 to 3400psi
