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 - 3,692 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.

UN Forklift MINI5TON-DIESEL-FORKLIFT
UN Forklift MINI5TON-DIESEL-FORKLIFT
HANGZHOU, Zhejiang, China
New - Sale
SMV (Konecranes) 16-1200C
SMV (Konecranes) 16-1200C 2022
Balling, Denmark
Used - Sale
|
Upcoming industry events …
World Hydrogen EXPO / H2 MEET 2025
December 4–7, 2025 - Goyang, Korea, Republic Of
The Battery Show Asia 2026
March 10-12, 2026 - Hong Kong, Hong Kong
Multimodal 2026
June 30-July 2, 2026 - Birmingham, United Kingdom
More Events
From the forum discussions …
"Keith from California posted a picture asking 'Could someone help identify this machine and motor?' John from Texas had the answer."
Keith_Porter, United States
Read & Post in our Forums
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY
UN Forklift MINI5TON-DIESEL-FORKLIFT
UN Forklift MINI5TON-DIESEL-FORKLIFT
HANGZHOU, Zhejiang, China
New - Sale
SMV (Konecranes) 16-1200C
SMV (Konecranes) 16-1200C 2022
Balling, Denmark
Used - Sale
|

Showcased in the Virtual Expo

Fact of the week
According to studies published in the English Journal of Medicine, the impact of daylight savings is revealed by a 24% increase in heart attacks on the Monday following the spring shift forward. When clocks move back in autumn, heart attacks drop by about 21%, suggesting that loss of sleep is an important driver.
Special Feature
Read more Special Feature articles
Global Industry News
edition #1258 - 27 November 2025
In this week’s Forkliftaction News , we report on Hyster-Yale laying off staff in the US amid what it describes as “challenging market conditions”... 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