L853 loader question on L5030

   / L853 loader question on L5030 #1  

thunderworks

Silver Member
Joined
Nov 12, 2006
Messages
183
Location
Kansas
Tractor
L3301
I have a L5030 tractor (800 plus hours) with a new L853 loader (less than 10 hours). The loader is very jerky on the descent . . . very smooth raising, very smooth with dump function, but if the bucket or grapple is high and I'm lowering it, I have to go quite slowly or it is very jerky . . . is this normal and a technique issue, or could something be not right in the valve?

Rick
 
   / L853 loader question on L5030 #2  
The load check on the lift/lower spool is designed to hold the loader from falling from the forces of gravity for a fraction of a second until pressure can build up. When the load check is not operating properly, you should see the jerking with the loader at any height but more pronounced the higher it is and the more weight in the bucket.

This is a typical symptom of a load check problem. The load check spring in the raise/lower spool might be defective or there is a piece of crud in the poppet and spring. Since it is a new valve, I vote for a piece of crud or some metal filings left over from manufacturing.

There will be a load check for each spool and they can be identified by a cap that closely resembles an unused port on the top of the valve. Carefully remove the load check cap for the lift/lower spool and remove the poppet and spring. Clean if required and replace. It's a 5 minute job.
 
   / L853 loader question on L5030 #3  
Sounds to me like there is still air in the lines.
 

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