3. Inspection and Adjustement (2) Spray pattern inspection After adjustment to the specified valve opening pressure, use a nozzle tester and Normal check the spray pattern and seat oil-tight- ness. @) Seat oil-tightness check After injecting a few times, increase the pressure gradually. Hold the pres- sure for about 5 seconds at a little be- fore the valve opening pressure of see that oil does not drip from the tip 1.96 MPa(20 kgf/cm*), and check to end of the nozzle. Uniform spray pattern from each nozzle joint exists during injection by the nozzle tester, check after retightening. If much oil is leaking, replace the nozzle assembly.
@ Spray and injection states If extreme oil leak from the overflow r ~~~ Abnormal l Operate the nozzle tester lever at a rate of once or twice a second and check no abnormal injection. l If normal injection as shown below cannot be obtained, replace the fuel injection valve. No extreme difference in angle (6) No extreme injection angle differ- Extreme difference in angle (9) Extremely different injection angle (a) Non-atomized spray Stagnant spray ence (a) Finely atomized spray Excellent spray departure 3-6