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8n hydraulics

G

Gary Singleton

Member
the top piston was redone lift works good when pump is running but when I slow the engine down the lift goes down slowly rev engine up lift goes back up where should I check seems like a valve is leaking down or could it be the piston any help would be apperciated
 
(quoted from post at 11:28:23 01/31/23) the top piston was redone lift works good when pump is running but when I slow the engine down the lift goes down slowly rev engine up lift goes back up where should I check seems like a valve is leaking down or could it be the piston any help would be apperciated
Click to expand...
ou have to eliminate all nine potential leak points, by inspection, etc.
vJgHdLe.jpg
 
What you are describing is normal for a new tractor direct from the factory. The Lift piston cannot seal tight enough to keep oil from leaking past. The tractors I have had all do that, 41 9N, 44 @N bought new, NAA, Ferguson TO-30. even the 65 and 68 Ford 4000 and 68 5000
 
(quoted from post at 12:51:45 01/31/23) What you are describing is normal for a new tractor direct from the factory. The Lift piston cannot seal tight enough to keep oil from leaking past. The tractors I have had all do that, 41 9N, 44 @N bought new, NAA, Ferguson TO-30. even the 65 and 68 Ford 4000 and 68 5000
Click to expand...

Leaking down so fast position control on an 8N can't correct is not normal and indicates a very large leak somewhere.

TOH

This post was edited by TheOldHokie on 01/31/2023 at 03:16 pm.
 
I don't see anything about leaking down so fast. New piston
and rings might or might not help.
 
I did not say anything about full throttle but just a bit. So
explaine to me how the 8N was so different in not needing
anything above an idle when the 9N, 2N, NAA, TO039 , 65 4000,
68 4000 and 68 5000 all did reqyire a bit of throttle. And I
have had all these tractors and still have the 9N and the 2N
bought new in may of 44. So what is so much different in the
8N that it can do at idle what none of the others could do. I
am talking about a 50-75 RPM difference.
 
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