Deutz — Injector disassembly and reassembly
Repair & overhaul
From a Deutz service manual covering: BF4L 1011 T, F2L 1011, F3L 1011, F4L 1011. Check it applies to your exact model before use.
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Before you start
- Nozzle needle and nozzle body are lapped together; may neither be confused nor exchanged individually.
- Do not touch nozzle needle with fingers.
Procedure
- Undo cap nut.
- Remove parts in order: cap nut, injection nozzle, intermediate pieces, thrust pin, compression spring, shims.
- Wash all parts in clean diesel fuel and blow out with compressed air.
- Check nozzle needle slides smoothly in body; do not interchange needle and body.
- Check seating faces of intermediate piece; ensure centering pins fitted.
- Insert shims; ejecting pressure depends on shims.
- Insert compression spring.
- Insert thrust pin with centering collar facing spring.
- Insert intermediate piece with centering pins into nozzle holder bores.
- Fit injection nozzle with center bores mating with intermediate piece centering pins.
- Screw on cap nut and tighten in accordance with specifications.
Specs & values
- Injector cap nut tightening torque 45+5 Nm
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.