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MTU — Fuel system - Venting

Maintenance · Fuel system (low pressure)

From a MTU operator's manual covering: 12V 2000 G23, 12V 2000 G43, 12V 2000 G63, 12V 2000 G83, 16V 2000 G23, 16V 2000 G43, 16V 2000 G63, 16V 2000 G83, 18V 2000 G63, 18V 2000 G83. Check it applies to your exact model before use.

Applies to: MTU 12V 2000 G43 engine, MTU 12V 2000 G83 engine, MTU 16V 2000 G43 engine, MTU 16V 2000 G83 engine, MTU 18V 2000 G83 engine

Before you start

  • Fuels are combustible; risk of fire and explosion.

Procedure

  1. Unlock fuel priming pump, unscrew handle.
  2. Loosen nut on banjo union.
  3. Operate the pump with the handle until fuel without bubbles comes out of the vent plugs.
  4. Tighten nut on banjo union.
  5. Loosen banjo screw; operate pump until fuel without bubbles comes out of the nipple; tighten banjo screw.
  6. Loosen union nut of fuel return line; loosen non-return valve; operate pump until bubble-free fuel emerges.
  7. Tighten non-return valve and union nut of fuel return line.
  8. Lock fuel priming pump, screw in handle.

Source: MTU operator's 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.

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