Isuzu NHR 4J Series Workshop Manual page 279

6C - 20 ENGINE FUEL
Pre-lift confirmation
1. With the needle valve at full lift, release the nozzle
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2. Read the needle valve lift 'liter' from the dial gauge
Pre-lift measuring point:
Read the dial gauge at first nozzle opening pressure +approx 1
MPa (10 kg/cm
040MV025-1.tif
3. Confirm that pre-lift 'liter' is as specified.
Pre-lift
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4. If pre-lift is not as specified, replace the pins, lift piece,
Service kit:
040MV031.tif
tester handle.
Note:
The in-line pressure will decrease and needle
valve lift (as indicated on the dial gauge) will also
decrease a little.
indication (once the needle valve has descended when
the second spring has stopped operating). Refer to the
pre-lift measuring point for 'liter'.
2
).
Note:
This point can be found while the pressure is
decreasing.
spacer and nozzle assembly as a set with the service
kit.
8-9720-3470-1
0.04
mm