Discussion:
lifting problem

hello have a 1977 H80 with a perkins engine. tilt seems fine but will not lift any weight. forks go up very quickly when empty but put on a few ton and no lift. can jerk hoist lever and cylinder will go up tiny bit with each jerk of lever. also forks come down very slowly when lowering. what can I test?
  • Posted 27 Oct 2014 12:30
  • By Johnnyb
  • joined 27 Oct'14 - 5 messages
  • Ontario, Canada
Showing items 1 - 2 of 2 results.
Thanks so much Swoop. Will do these when I get back from golf. Heading for Santee tomorrow for 3 days and then to Myrtle Beach for 10. Will wave if I see you!!!
Thanks again.
  • Posted 28 Oct 2014 04:23
  • By Johnnyb
  • joined 27 Oct'14 - 5 messages
  • Ontario, Canada
check the relief valve in the main control valve.
might have a broken spring in it.

next would be the safety valve at the cylinders and lastly check the cylinder packing.

pressure is bypassing somewhere
  • Posted 27 Oct 2014 23:45
  • By swoop223
  • joined 23 Mar'12 - 3,692 messages
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com

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.

Upcoming industry events …
December 4–7, 2025 - Goyang, Korea, Republic Of
March 10-12, 2026 - Hong Kong, Hong Kong
June 30-July 2, 2026 - Birmingham, United Kingdom
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
Latest job alerts …
Ncn 110TH
Ncn 110TH 2015
Balling, Denmark
Used - Sale
Tusk 500PGH14
Morgantown, Pennsylvania, United States
Used - Sale
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
Movers & Shakers
Sue Tomic Sue Tomic
Board chair, Australian Supply Chain & Logistics Association (ASCLA)
Strategic business development manager, Heli Materials Handling Oceania
Chief executive officer, Hire Industry Association of New Zealand (HIANZ)
Chief executive officer, Australian Supply Chain & Logistics Association (ASCLA)