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9LD Workshop Manual _ cod. 1.5302.286 - 3° ed_rev. 02
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Fuel system
Size P injector, for 97/68 CE and EPA engines
Components:
1 Injector housing
2 Intake fitting
3 Shim
4 Spring
5 Pressure rod
6 Taper pin
7 Nozzle
8 Cup
9 Needle valve
10 Sump
11 System duct
12 Overflow pipe
Injector setting
Connect the injector to a diesel injector calibration pump.
Check needle valve sealing by slowly moving hand pump until
approximately 180 bar and maintain this pressure for 10 seconds.
Chek that setting pressure is 210 ÷220 bar for standard engines (245 ÷
230 bar for EPA e CE engines); make the required adjustments, if any,
by modifying the adjusting shim height.
When replacing the spring, setting should be performed at a 10 bar
greater pressure (255÷265 bar) to allow for bedding during operation.
Replace nozzle in case of dripping.
Size P nozzle, for 97/68 CE and EPA engines
Features:
Hole number and diameter ............. 5 x 0.23 mm.
Jet angles ....................................... 150°.
Needle valve elevation .................... 0.200 ÷ 0.205 mm
Clean nozzle tip with a brass brush.
Check that holes are not obstructed using a mandrel with steel wìre
with 0.23 mm diam.
When refitting tighten ring nut at 42 ÷ 48 Nm.
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