Isuzu 4JA1 Workshop Manual page 213

4. Install the pin to the dial gauge.
Note:
The lengths of the pins do not include the
threaded portions.
Pin (L=100 mm (3.9 in)): 157892-5200 (Bosch AS)
Dial gauge:
040MV029.tif
5. Secure the dial gauge to the nozzle holder using the
nut so that the pin contacts the tip of the first spring
seat.
CAUTION:
• Secure the dial gauge so that a stroke of 2 mm can
be measured.
• Do not over-tighten the nut as the dial gauge shaft
may jam. (Confirm from the dial gauge that the
shaft moves smoothly.)
040MV009.tif
6. Set the nozzle holder to the nozzle tester and put
needle to zero on the dial gauge.
7. Operate the nozzle tester to bleed any air from inside
the retaining nut and to confirm that no fuel leaks.
040MV030.tif
FUEL SYSTEM 6C – 31
157954-3800 (Bosch AS)
185317-0150 (ISUZU)