Injection Starting Pressure - Ford TRADER Workshop Manual

F3
9TGOF3·064
SHIM
CORRECT WRONG
WRONG
F3-26
FUEL SYSTEM
Injection starting pressure
1. Connect the nozzle to a nozzle tester.
2. Pump the nozzle tester handle and note the pressure when
injection is started.
Injection starting pressure
New nozzle 20,580 kPa (210 kg/cm
2
,
2,986 psi)
Used nozzle 19,620 kPa (200 kg/cm2, 2,844 psi)
3. If not within the specified pressure. adjust the starting pres-
sure by adding or removal.
Note
• Shims are available in O.OSmm (0.002 in) steps, from
0.5 to 1.4Smm (from 0.02 to 0.057 in). Changing
shim thickness by O.OSmm (0_002 in), changes the
injection pressure approx. 491 kPa (5.0 kg/cmZ, 71
psi).
Leakage of injector
Apply pressure 1,962 kPa (20 kg/cm
2
,
284 psi) lower than the
specified injection pressure, and see if the fuel leaks from the
nozzle injection hole.
If the fuel leaks, it is necessary to disassemble, wash and
recheck the nozzle or replace it.
Atomizing condition
1. Connect the nozzle on the nozzle tester.
2. Bleed the air by operating the nozzle tester handle several
times.
3. Keeping the pressure gauge of the nozzle tester in the non-
functioning condition. quickly lower the handle (lower the
handle as quickly as possible so that a pulsating whistling,
sound can be hard). Repeat this operation several times
and check the atomizing condition.
4. Verify that the fuel is atomized uniformly and properly.
5. Verify that the injection angle and direction are normal.
6. If the atomizing condition is incorrect, it is necessary to dis-
assemble, wash and recheck the nozzle, or to replace
it.
Disassembly
1. Clamp the nozzle in a vise as shown in the figure.