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No Power Steering No Code

Forklift came into the shop with no power steering and showing no code. Have replaced pump, motor, hydrostatic steering valve, display board, steering cylinder above rear wheel, steering position sensor, and the current drive sensor. Still no power steering. Any ideas?
  • Posted 18 Jul 2023 03:49
  • Modified 19 Jul 2023 05:57 by poster
  • By ttnaruse
  • joined 18 Jul'23 - 2 messages
  • California, United States
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Forgot to clarify the motor does run. When we replaced the steering cylinder in the back the power steering worked for an hour then stopped again. Been stuck ever since.
  • Posted 20 Jul 2023 00:38
  • By ttnaruse
  • joined 18 Jul'23 - 2 messages
  • California, United States
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I believe it requires a seat switch and park brake input to activate the PS contactor on the early models.
  • Posted 19 Jul 2023 23:18
  • By ErichO
  • joined 26 Oct'21 - 83 messages
  • Washington, United States
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Fact of the week
The dot-com bubble, a period of large and rapid investments in internet-based companies, peaked in 2000 and saw the Nasdaq Composite index rise by 579%. Then the bubble imploded. As the value of tech stocks plummeted, cash-strapped internet start-ups became worthless and collapsed.