Lombardini — Checking and setting the injectors
Adjustments
From a Lombardini service manual covering: 25LD330-2, 25LD425-2, KD 425-2. Check it applies to your exact model before use.
Procedure
- Clean the nozzle holes with 0.25 mm gauge steel wire.
- Place the injector on test bench p.n. 00365R0430.
- Bypass pressure gauge and operate lever rapidly; nozzle should chatter and spray correctly.
- Connect pressure gauge and press lever slowly until injection occurs.
- Opening pressure should be 230 kg/cm² (200 kg/cm² on silenced versions).
- Change adjusting shims to achieve correct adjustment.
- Test tightness: operate lever until gauge reads 20 kg/cm² below opening pressure; no fuel at nozzle tip after 10 seconds.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Opening pressure 230 kg/cm² (200 kg/cm² silenced)
Source: Lombardini service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.