Komatsu GD705-5 cranks but won't start.

[Mc Wyndell]

I'm having a no-start issue with my Komatsu GD705-5 grader. The engine cranks over normally, but it won't fire up and run. I've checked the batteries and basic connections, but haven't found the problem yet. Has anyone dealt with a GD705-5 that cranks but won't start? Any suggestions on what to check first, such as fuel delivery, shutoff solenoid, sensors, or electrical issues?

 

[Theoeni1]

If the engine cranks normally, start with the basics: fuel, air, and electrical controls. A faulty fuel shutoff solenoid, clogged fuel filters, air in the fuel system, or a failed crank/cam sensor can all cause a no-start condition.

 

[kksajib6]

Check your fuel shutoff solenoid and fuel delivery pressure first—if it's cranking strong, it's usually a fueling issue.

 

[hpbuon]

I've run into similar crank-no-start issues before. I'd start by checking the fuel shutoff solenoid and making sure the fuel system isn't air-locked or restricted by a clogged filter. Those are common causes and usually easier to verify before digging into sensors or more complex electrical problems.