Leyland 255N Power Assist Not Working

A place for general Leyland tractor questions and chat
Post Reply
Posts: 1
Joined: Tue Jul 02, 2024 5:57 pm
United States of America

Leyland 255N Power Assist Not Working

Post by rascal1958 »

Hello. I just bought a Leyland 255N with the power steering not working. I have changed the fluid and filter. Bled the air and followed the manual adjustment procedure. I am at a loss. How do I know if the pump is operating correctly? Does the pump burn up if it was run without fluid? Don't know that it ever was, just thinking it is a possibility. Thank you.

Senior Member
Posts: 638
Joined: Sun Apr 01, 2018 8:49 am
Great Britain

Re: Leyland 255N Power Assist Not Working

Post by Nowtnew »

To see if there is any force being developed, probably the easiest way is to set the screwed valve adjusting pin so there is a lot of free movement in the system. More than the 3 turns as given in the manual. So, with the engine stopped, there might be a quarter of a turn slop at the steering wheel. Then see if there is any assistance when the engine is going.
If this produces a positive result it will at least show that the pump, valve and cylinder are working.


PS. You might find this earlier post to be of interest:
Post Reply