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Cat 304CR Hydraulic problem

3

37train5k

Member
Joined
Oct 19, 2016
Messages
16
Location
TX
I have a CAT 304 CR which has been giving me problems. I have hired 2 different mechanics and they both temporarily get it working only to have the problem return.

Problem: The up and down boom loses 99% of power.
The mechanics have "repaired" the valve which they said was sticking and replaced it with a new one as I was told the valve "was sticking". I have taken the machine to a hydraulic shop and they said the valve is definitely not sticking and they are perplexed as to what the problem is now. All other operations are working perfectly and the pump is working at the specified pressures. All fluids and filters have been changed, cleaned, etc.

Any ideas?
 
L

lantraxco

Senior Member
Joined
Jan 1, 2009
Messages
7,704
Location
Elsewhen
Dunno the 304, but typical issues are cylinder piston seals, port relief and load check valves, if it has load sense, then a resolver or two may be malfunctioning. Can you get the boom to work strong by bringing in other functions at the same time?
 
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