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