Komatsu WA150-6 Wheel Loader Repair Service Manual

Table of Contents

Komatsu WA150-6 Manual

Main sections and selected subjects identified in the source documentation:

• Manuals: Shop Manual
• Index and Foreword
• Specification
• Structure, functions and maintenance standard
• Standard value table
• Testing and Adjusting
• Troubleshooting
• Disassembly and Assembly
• Appendix
• Diagrams and drawings
• Manual Extract Bleeding air from fuel circuit
• If fuel is used up or if a fuel circuit part is removed and installed, bleed air from the fuel circuit according to the following procedure.
• Put chocks under the tires securely.
• When measuring, check that there are no persons around the machine.
• Fill the fuel tank with fuel.
• Open the right side cover of the engine.
• Remove fuel pre-fuel filter (1) and fill it with fuel.
• Fill the fuel filter with clean fuel and take care that dirt will not enter it.
• After filling the pre-fuel filter with fuel, remove the cap from part (a).
• If clean fuel is not available, do not remove the pre-fuel filter but fill it with the fuel by operating priming pump (2).
• Do not add fuel to fuel main filter externally.
• Install pre-fuel filter (1) to the filter head.
• Apply engine oil thinly over the packing on the pre-fuel filter side.
• After the packing of the pre-fuel filter touches the sealing face of the filter head, tighten the fuel filter 3/4 turns.
• Loosen air bleeding plug (4) of the fuel main filter bracket and operate priming pump (2).
• Operate the priming pump until fuel flows out of the plug hole. After checking that fuel flows out, tighten the plug (4).
• Confirm that air does not coexist in fuel. 3Air bleeding plug (4): 7.8 – 9.8 Nm {0.8 – 1.0 kgm}
• Push the knob of the priming pump, and fix it.
• Start the engine with the starting motor.
• a The air in the high-pressure circuit is bled automatically if the engine is cranked.
• a If the engine does not start, there may be still air in the low-pressure circuit. In this case, repeat the above procedure from step 5.