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Cat 330B Hydraulics Problems.

K

kbeen

Well-Known Member
Joined
Jul 22, 2012
Messages
125
Location
oklahoma
Hello to all, wanted to put this out there to see if anyone has already ran across this issue. Our Cat 330B has started having some of the functions to move on there own, namely the boom up & down, bucket open & close and stick in & out, NO swing left or right though. seems worse when hot. it will boom all the way to the top, you can move joystick to boom it back down but when you release joystick it will boom back to top. similar problems on stick and bucket. has also taken spell where the bucket will not open. if this is a contamination problem sticking the pilot valves I would think the swing would be acting same as the boom,stick and bucket as far as moving on there on. Only way to stop it when it is acting up is to move the safety lever by operator which kills the pilot oil pressure . going out tomorrow to change out all hydraulic filters and cut open. any ideas will be appreciated. thank you
 
B

Bob/Ont

Senior Member
Joined
Sep 18, 2012
Messages
1,605
Location
Ontario
If no body has been working on it recently I would look for a restricted drain line from the joysticks.
Later Bob
 
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