MAINTENANCE
Injection Nozzle
Injection Nozzle Inspection
Use a nozzle tester to check the injection nozzle opening
pressure and the spray condition.
If the opening pressure is above or below the specified
value, the injection nozzle must be replaced or recondi-
tioned.
If the spray condition is bad, the injection nozzle must be
replaced or reconditioned.
Injection Nozzle Opening Pressure kgf/cm
2
(psi/MPa)
185 (2,630/18.1)
Spray Condition
(1) Correct
(2) Incorrect (Restrictions in orifice)
(3) Incorrect (Dripping)
Injection Nozzle Adjustment
1. Clamp the injection nozzle in a vise.
2. Use a wrench to remove the injection nozzle retain-
ing nut.
3. Install the injection nozzle 1 , the push rod 2 , the
spring 3 , and adjusting shim 4.
Retaining Nut Torque kgf·m(lb.ft./N·m)
4.0 – 5.0 (28.9 – 36.2/39.2 – 49.0)
4. Attach the injection nozzle holder to the injection
nozzle tester.
5. Apply pressure to the nozzle tester to check that the
injection nozzle opens at the specified pressure.
If the injection nozzle does not open at the specified
pressure, install or remove the appropriate number
of adjusting shims to adjust it.
Adjusting Shim Availability mm(in.)
Range 0.50 – 1.50 (0.02 – 0.06)
Increment 0.025 (0.001)
Total No. of Shims 40
(Reference)
Removing or installing one shim will increase or
decrease the nozzle opening pressure approximately
3.77 kgf/cm
2
(53.6 psi/370kPa).
WARNING:
TEST FLUID FROM THE INJECTION NOZZLE TESTER
WILL SPRAY OUT UNDER GREAT PRESSURE. IT CAN
EASILY PUNCTURE A PERSON’S SKIN. KEEP YOUR
HANDS AWAY FROM THE INJECTION NOZZLE TESTER
AT ALL TIMES.
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