2004 ISUZU TF SERIES Workshop Manual

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Page 1329 of 4264

ISUZU TF SERIES 2004 Workshop Manual FUEL SYSTEM 6C – 29 Injection Nozzle Adjustment First nozzle opening pressure adjustment 1.Clamp the nozzle holder in a vise. 2. Install the shim, first spring and spring seat in

Page 1330 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6C – 30 FUEL SYSTEM 5. Install the pins in the spacer. 6. Install the nozzle on the spacer. 7. Hand-tighten the adjustment retaining nut together with the gasket to the nozzle ho

Page 1331 of 4264

ISUZU TF SERIES 2004 Workshop Manual FUEL SYSTEM 6C – 31  First nozzle opening pressure adjusting shims Parts No. (ISUZU) Thickness (mm) 115349-0420 0.40 115349-0430 0.50 115349-0440 0.52 115349-0450 0.54 115349-0460 0.56

Page 1332 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6C – 32 FUEL SYSTEM 4. Install the pin to the dial gauge. Note: The lengths of the pins do not include the threaded portions. Pin (L=100 mm): 157892-5200 (Bosch AS) Dial gauge:

Page 1333 of 4264

ISUZU TF SERIES 2004 Workshop Manual FUEL SYSTEM 6C – 33 8. Operate the nozzle tester and increase the in-line pressure to 34.3 - 44.1 MPa (350 - 450 kg/cm2) so that the nozzle’s needle valve moves through its full lift.

Page 1334 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6C – 34 FUEL SYSTEM 2. Read the needle valve “pre-lift” point from the dial gauge indication (once the needle valve has descended when the second spring has stopped operating). Pre-

Page 1335 of 4264

ISUZU TF SERIES 2004 Workshop Manual FUEL SYSTEM 6C – 35 2. Release the nozzle tester handle so that in-line pressure decreases. Note: The in-line pressure will decrease and needle valve lift (as indicated on the dial gau

Page 1336 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6C – 36 FUEL SYSTEM Second nozzle opening pressure adjustment If the second nozzle opening pressure is not as specified, disassemble the nozzle from the nozzle holder and replace the shim
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