1999 bobcat 331 boom lift circuit

   / 1999 bobcat 331 boom lift circuit #1  

RBtom

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Joined
Jun 25, 2024
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4
Tractor
1999 bobcat 331
I have a 1999 bobcat 331 with hydraulic trouble.
The boom lift cylinder drifts so bad I can't use the machine. This is the only circuit affected, I'm thinking I can rule out pump trouble.
I can pick it up under extremely high rpm but immediately falls to the ground. The cylinder was rebuilt a few years ago and I'm really thinking that's not the trouble either. Seems to be a valve or something else failed in the circuit.
I asked on the bobcat page with no results. Any help or direction to go with this would be appreciated
 
   / 1999 bobcat 331 boom lift circuit
  • Thread Starter
#2  
I have adjusted every valve affecting the boom lift circuit with no success.
 

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