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Forklift won't lift or lower mast

Gm everybody I have a komatsu fg18shtu-20
Which the yellow and dark gray forklift stay rise trying to lower mast I know it have 3 mast lock out under the hydraulic Control trying to find out why mast won't lift or lower any help I appreciate
  • Posted 15 Jun 2021 01:03
  • By Steven_Orellana
  • joined 15 Jun'21 - 5 messages
  • New Jersey, United States
Steve
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Sorry to get back you so late but I found the problem it was the check Valve thats in from mast where the hydraulic hose is connected to a block
  • Posted 7 Aug 2021 04:50
  • By Steven_Orellana
  • joined 15 Jun'21 - 5 messages
  • New Jersey, United States
Steve
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Try to jumper power to the lift/lower hydraulic lock solenoid. If it still does not allow lift or lower then it's bad. I have had them go bad on several trucks.
  • Posted 28 Jul 2021 14:06
  • By 1CrownTech
  • joined 23 Jul'21 - 117 messages
  • Washington, United States
1crowntechnician@gmail.com
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