1. Home
  2. Forums
  3. Technical Troubleshooting

Cat Lift Trucks (& Caterpillar) DP25N:
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
  • Discussion started by kris_d
  • 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
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
Post a Reply Report this post

Post your Reply

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Having trouble using the Discussion Forums? Contact us for help.

Upcoming industry events …
LOGMAT
May 09-11, 2025 - Bangalore, India
TOC Americas 2025
October 21-23, 2025 - Panama City, Panama
The Battery Show Asia
July 15-17, 2025 - Hong Kong, Hong Kong
More Events
From the forum discussions …
"Truck squeals when tilt, reach or side shift are used. Any ideas on why this would happen?"
marcos_m, United States
Read & Post in our Forums
Fact of the week
On average, people read 10-30% slower from a screen than from paper.
Global Industry News
edition #1228 - 1 May 2025
There is simply no ignoring the push for a greener, more sustainable materials handling equipment industry as manufacturers and customers alike seek eco-friendly solutions to reduce or eliminate carbon emissions... Continue reading

PREMIUM business

Lift Technologies Inc.
Global leader - manufactures masts, carriages, sideshifters & fork positioners
Lift Technologies Inc.
Upcoming in the editorial calendar
ARTIFICAL INTELLIGENCE
May 2025
Ask us about editorial contribution

Showcased in the Virtual Expo

Latest job alerts …
Field Service Technician - Small Equipment
Louisville, KY, United States
Material Handling Equipment Rental Manager
Louisville, KY, United States
Service Manager
Dubuque, IA, United States
View more jobs alerts
Movers & Shakers
Linda Häkkilä Linda Häkkilä
Linda Häkkilä
vice president, Investor Relations, Konecranes
Rhiannon Stone
vice president operations, Elokon Group
Bennit Schmieder
President, EP Equipment Europe
Mathias Höglund
Senior vice president human resources, Kalmar