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Curtis B.
Curtis B., Technician
Category: Construction and Road Equipment
Satisfied Customers: 1050
Experience:  Technican turned service manager with multiple lines of equipment and rental units.
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I have a PC300LP6 Excavator. The arm cylinder drifts in and

Customer Question

I have a PC300LP6 Excavator. The arm cylinder drifts in and out. The cylinder was damaged and some pieces went downstream. The cylinder was rebuilt but the problem still occurs. Where do I look next?
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  dieseldan55 replied 1 year ago.
Hello, you need to inspect the spool and relief valves for the circut for debri or scoring. I also will flush the lines out by putting them in a five gallon bucket to clear between the valve and cylinder.
Customer: replied 1 year ago.
Any idea where I could find a repair manual for this unit?
Expert:  dieseldan55 replied 1 year ago.
HI, WELL I HAVE ACCESS TO ONLINE MANUALS FOR THIS UNIT BUT THEY ARE NOT THE GREATEST. WHAT ARE YOU LOOKING FOR?
Customer: replied 1 year ago.
Maybe a parts breakdown of the control valve and relief valve. Maybe a hydraulic schematic. I am not sure where the relief valve is located on this unit or the spool valve for this cylinder for that mater.
Expert:  dieseldan55 replied 1 year ago.
Hi, send me the serial number and the number of spools in your valve and i will look to see what i can find. Normally you can follow the pipes back to the valve to determine the spool location but not always. Relief should be next to spools.

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