Deutz — Injector testing and adjustment
Testing & diagnosis
From a Deutz service manual covering: F2L 1011, F3L 1011, F4L 1011. Check it applies to your exact model before use.
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Before you start
- Beware of injection nozzle fuel jet. The fuel penetrates deeply into the skin tissue, possibly resulting in blood poisoning.
- Utmost cleanliness must be observed when working on the injection equipment.
Procedure
- Connect injector to testing outfit.
- Check opening pressure: slowly press down lever; the pressure at which gauge pointer stops or suddenly drops is the opening pressure.
- Clamp injector between soft-metal cheeks in vise. Remove cap nut and all other parts.
- Adjust pressure by selecting appropriate shim. A thicker shim increases the opening pressure.
- Reassemble injector and recheck on testing outfit.
- Checking for tightness: dry nozzle and holder, press to about 20 bar below previous opening pressure.
- Nozzle is tight if there is no dripping within a period of 10 seconds.
- Buzzing and spray pattern test. If nozzle does not buzz despite cleaning, replace it.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- No dripping within 10 seconds
- Use only pure test oil to ISO 4113 or clean diesel fuel
- Nozzle must be replaced if it does not cure leak; reworking is not admissible
Source: Deutz 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.