Caterpillar 320C / 320C EXCAVATOR GNG — Fuel Injection Lines - Remove and Install
Repair & overhaul
For the Caterpillar 320C / 320C EXCAVATOR GNG, from the Caterpillar service manual.
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Before you start
- Keep all parts clean from contaminants.
- Cap or plug all openings to prevent fuel system contamination.
Procedure
- Remove bolts (1), washers, and clamps (2) securing fuel lines to inlet manifold (3).
- Disconnect fuel injection lines (4) from fuel injection nozzles (5). Cap openings.
- Disconnect fuel injection lines (4) from fuel injection pump (6). Cap openings.
- Remove fuel injection lines (4) from engine.
- Loosen acorn nuts (7) securing fuel return line to fuel injection nozzles.
- Remove one bolt (8) and washer from clamp securing fuel return line to intake manifold.
- Disconnect fitting (9). Remove fuel return line (10) from engine. Cap openings.
- Place fuel return line (10) on engine. Connect fitting (9) to fuel injection pump.
- Install washer and bolt (8) through clamp to secure fuel return line to inlet manifold.
- Install fuel return line (10) to fuel injection nozzles. Secure with acorn nuts (7).
- Place fuel injection lines (4) on engine.
- Connect fuel injection lines (4) to fuel injection pump (6).
- Connect fuel injection lines (4) to fuel injection nozzles (5).
- Tighten nuts for fuel injection line to torque of 25 N·m (18 lb ft).
- Install clamps (2), washers, and bolts (1) securing fuel lines to inlet manifold (3).
Specs & values
- 25 N·m (18 lb ft) fuel injection line nuts
Source: Caterpillar 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.