1. Home
  2. Forums
  3. Maintenance & Troubleshooting
  4. Lift / mast dropping when sit on seat

Discussion:
Lift / mast dropping when sit on seat

Hi, I have a Cat DP25N, S/N T17D-60047.
The mast drops when you sit on the seat. I have been told it may be a LLS or unloader valve connected to the seat switch. Can anyone help out with info / advise on this?
  • Posted 20 Jan 2015 13:36
  • By kris_d
  • joined 29 Jan'14 - 7 messages
  • Queensland, Australia
Post a ReplyReport this post
Showing items 1 - 1 of 1 results.
sounds to me like the lowering spool is stuck or there is a problem in the control valve

even when the lift lock is engaged or disengaged there should be no movement from the mast unless it is called for by moving the levers.
  • Posted 25 Jan 2015 04:24
  • By swoop223
  • joined 23 Mar'12 - 3,696 messages
  • North Carolina, United States
You've been swooped!
swoop223@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.

Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY
Maxlion FD30
Maxlion FD30
Hangzhou, China
New - Sale
Taylor TX330S
Taylor TX330S 2013
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
USD159,500
|
Upcoming industry events …
CONEXPO-CON/AGG 2026
March 3-7, 2026 - Las Vegas, NV, United States
Smart Retail Expo
January 28-30, 2026 - Bangkok, Thailand
Gulf Print and Pack 2026
31 March 2026 - Dubai, United Arab Emirates
More Events
Fact of the week
The two internal cavities in our nose called nostrils function as separate organs. Each nostril has its own set of turbinates and olfactory receptors. The two independent organs work together through a mechanism called the nasal cycle, where one nostril is dominant for air intake while the other rests and is better at detecting scents.

Showcased in the Virtual Expo

From the forum discussions …
"Linde H30D BR 393 - Thanks to Techs from US, Poland and Slovenia for working on this problem: '...Does the engine run at full rpm when accelerating? Does engine rpm reach max as hyds engaged?'"
John_Bradley, United States
Read & Post in our Forums
Fact of the week
The two internal cavities in our nose called nostrils function as separate organs. Each nostril has its own set of turbinates and olfactory receptors. The two independent organs work together through a mechanism called the nasal cycle, where one nostril is dominant for air intake while the other rests and is better at detecting scents.