1. Home
  2. Forums
  3. Maintenance & Troubleshooting
  4. Forklift won't lift or lower mast

Discussion:
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
Post a ReplyReport this post
Showing items 1 - 2 of 2 results.
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
Post a ReplyReport this post
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
Post a ReplyReport this post

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Fact of the week
Allodoxaphobia is rare social phobia, an intense and irrational fear of other people's opinions. It goes beyond typical social awkwardness or shyness and can significantly impact a person's life.
Global Industry News
edition #1259 - 4 December 2025
In this week’s Forkliftaction News , we look at the November Logistics Manager’s Index which has dropped to the lowest it has been since June 2024... Continue reading

PREMIUM business

Bolzoni SpA (Group HQ)
Manufacturer of Lift Truck Attachments, Forks and Lift Tables, with the most extensive range in the market.
Bolzoni SpA (Group HQ)
Fact of the week
Allodoxaphobia is rare social phobia, an intense and irrational fear of other people's opinions. It goes beyond typical social awkwardness or shyness and can significantly impact a person's life.
Crown WP302020
Crown WP302020
Braeside, Melbourne, Victoria, Australia
Hire
SMV (Konecranes) SL37-1200A
SMV (Konecranes) SL37-1200A 1999
Morgantown, Pennsylvania, United States
Used - Sale & Hire
|
Your Focus
Tejal Ranjan
Vehicle mounted terminals and private 5G/LTE is the next-gen wireless standard for security and performance
Tejal Ranjan
Read blog
Read more Your Focus blog articles
Global Industry News
edition #1259 - 4 December 2025
In this week’s Forkliftaction News , we look at the November Logistics Manager’s Index which has dropped to the lowest it has been since June 2024... Continue reading
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY