Isuzu A-4JA1 - Injection Quantity and Governor Adjustment

FUEL SYSTEM
142
Important Operations
3. Adjust Shim
Adjust Shim Availability mm(in.)
Range 0.50-0.50 (0.02-0.06)
Increment 0.025 (0.001)
Total No. of Shims 40
7. Retaining Nut
Tighten to the retaining nut to the specified torque.
Retaining Nut Torque kgf·m(lbs.ft./N·m)
4.0 – 5.0 (28.9 – 36.2/39.2 – 49.0)
Injection Nozzle Adjustment
1. Attach the injection nozzle holder to the injection
nozzle tester.
2. 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.
(Reference)
Removing or installing one shim will increase or decrease
the nozzle opening pressure approximately 3.77 kgf/cm
2
(53.6 psi/369.7 kPa).
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.