Cat Lift Trucks (& Caterpillar) C5000:
Cat C5000 depowers.

I am working on a C5000 that will depower without any codes. We have swapped ECMs and water temp. senders with another truck and the problem persists. It depowers when you accelerate. You can reset it by restarting the truck. The voltage from the ECM going into the throttle body drops but we ruled out the ECM by swapping it. Please Help!
  • Posted 24 May 2013 07:37
  • Discussion started by Lift_Boyz
  • Pennsylvania, United States
Showing items 1 - 4 of 4 results.
Thanks. It seems as though the screen was the problem. It was completely coated.
  • Posted 24 May 2013 22:18
  • Reply by Lift_Boyz
  • Pennsylvania, United States
One other thing to check s the "last chance screen"......on he LP vapor inlet tube at the throttle body.take the line off and then the two screws that hold the tube to the TB....under the tube is a SMALL screen held in place by a clip...see if this screen s plugged with debris and junk.........
  • Posted 24 May 2013 19:45
  • Reply by kevin_t
  • Pennsylvania, United States
On top of the Vaporizor is a 17 MM hex,take this out and finger tighten a 1/8 NPT barbed nipple to hook a vacuum/PSI gauge into and check your fuel pressure at idle AND at full RPM then pull the tilt back and let it deadhead and see if the PSI drops real low....
  • Posted 24 May 2013 19:41
  • Reply by kevin_t
  • Pennsylvania, United States
Sounds like a fuel/fuel delivery issue either the fuel PSI is low coming out of the Vaporizor(should be about 4.5 PSI) and it is starving for fuel or the injector is acting up and needs replaced....might also be the fuel PSI sensor next to the injector.....another possibility is the Lockoff...it has a small screen filter in it,possible that is getting plugged,or the Lockoff itself is acting up and shutting the fuel on and off,never run into that tho on this truck..
  • Posted 24 May 2013 19:38
  • Reply by kevin_t
  • Pennsylvania, United States

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