Fuel Circuit Air Bleed Manual

Product Overview

This comprehensive manual guides you through the process of bleeding air from the fuel circuit of your machinery. Essential for ensuring optimal performance, this procedure is necessary when the fuel is depleted or any component of the fuel circuit is serviced. Follow the steps outlined below for safe and efficient air bleeding from the fuel system.

Table of Contents

• Index and Foreword
• Specification
• Structure, Functions, and Maintenance Standards
• Standard Value Table
• Testing and Adjusting
• Troubleshooting
• Disassembly and Assembly
• Appendix
• Diagrams and Drawings

Manual Extract: Bleeding Air from the Fuel Circuit

If you have run out of fuel or replaced part of the fuel circuit, follow these steps to bleed air from the system:

• Securely place chocks under the tires.
• Ensure no one is around the machine when performing these actions.
• Step 1: Fill the fuel tank with fuel.
• Step 2: Open the right side cover of the engine.
• Step 3:
  • Remove the pre-fuel filter and fill it with clean fuel, ensuring no dirt enters.
  • Check and fit the cap to the central hole of the pre-fuel filter, then add fuel through the side holes.
  • After filling, remove the cap from the central hole.
  • If clean fuel is unavailable, skip removal of the pre-fuel filter and use the priming pump to fill it.
  • Avoid adding fuel externally to the main filter.

  
  
  

• Step 4:
  • Install the pre-fuel filter and lightly apply engine oil to its packing.
  • When the packing touches the filter head’s sealing face, tighten the filter by 3/4 of a turn.
• Step 5:
  • Loosen the air bleeding plug on the main filter bracket and use the priming pump.
  • Operate the pump until fuel exits through the plug hole, then tighten the plug to 7.8 – 9.8 Nm.
  • Ensure no air remains in the fuel system.

  
  
  

• Step 6: Push and fix the knob of the priming pump.
• Step 7: Start the engine using the starting motor. The high-pressure circuit air is bled automatically during cranking.
• If the engine fails to start, repeat the procedure from Step 5 to remove any remaining air in the low-pressure circuit.