320 hydraulic chatter

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Joined
Sep 29, 2019
Messages
7
I have a 320 John deere that chatters violently going down especially from highest position and screeches a little at beginning of going up. I've greased pins and it's still doing it. I'm thinking it is bushing pin damage and removed 4 pins and there not bad enough to cause that. Could it be a hydraulic valve issue or internal cylinder issue
 
Joined
Sep 29, 2019
Messages
7
I have a 320 John deere that chatters violently going down especially from highest position and screeches a little at beginning of going up. I've greased pins and it's still doing it. I'm thinking it is bushing pin damage and removed 4 pins and there not bad enough to cause that. Could it be a hydraulic valve issue or internal cylinder issue
just to update the right side hoist cylinder had failed internally so I had both cylinders repaired and resealed . Still having an issue with hydraulic system chattering violenlently at slow lowering of hoist cylinders and under load it seems hoisting . Messing around I have discovered when I pull pressure release cable it runs perfect with all especially hoist up /down when i release cable there seems to be a back pressure issue . I initially thought it was a poor greasing and there has been but pulling that cable seems like ive taken a load of system . Any input would be appreciated
 

Nizagin

Member
Joined
May 8, 2022
Messages
7
A pressure resistance test is a testing method to know if your hydraulic valve has any issues. If you do this test, you can know about the hydraulic valve problem.
 
Joined
Sep 29, 2019
Messages
7
A pressure resistance test is a testing method to know if your hydraulic valve has any issues. If you do this test, you can know about the hydraulic valve problem.
It ended up being hydraulic control valve safety port solenoid valve assembly. I was in the field working on this machine so the machine provided its pressure resistance test . What equipment would you recommend to do this test your talking about ,thanks
 
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