Cat Lift Trucks (& Caterpillar) F35:
F35 - Variable speed not working - only full throttle

I'm having issues with the drive system on an F35. I get no movement when the accelerator is uses, except at full throttle, if I wait a few seconds I can hear audible steps (I think 4 total) and then I get full throttle. It is also dependent on the steering wheel being set to mostly straight ahead. I just found out there is an interlock between steering angle and the drive controller. I haven't looked at any of the steering electronics, but I did take apart the box connected to the accelerator pedal and didn't find anything out-of-the-ordinary inside. Can anyone guide me to next steps? I have found the diagnostic switch, but I'm not sure where error codes would read out. The Display on the steering column only displays a "D" I believe. I see no procedure for diagnostics on the panel below the seat. Any help much appreciated. Battery is a full charge. All hydraulics function normally and at expected speed. Forklift has worked for over a year without problem. This is a new issue, possibly correlated with the weather becoming damp.
  • Posted 7 Jan 2022 15:14
  • Discussion started by trisimon
  • Washington, United States

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Fact of the week
US Congress instituted a "debt ceiling" in 1917 to make it easier to finance mobilization efforts in World War I, while managing the budget. Before that, Congress generally had to authorize each bond issue. The debt ceiling was raised at least 90 times in the 20th century. The last raise occurred this year in June.
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Fact of the week
US Congress instituted a "debt ceiling" in 1917 to make it easier to finance mobilization efforts in World War I, while managing the budget. Before that, Congress generally had to authorize each bond issue. The debt ceiling was raised at least 90 times in the 20th century. The last raise occurred this year in June.