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    No down pressure on boom on a kobelco sk300lc

    I have a question on a kobelco sk300lc, mark IV, s/n: YCU0756. Here is my problem, every function on the excavator works fine and the boom goes down fine but has no down force pressure once it meets the ground it will lift the excavator about 1 inch off the ground fast but stops and pluses...
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    Problem with a 1977 ratgo rascal compactor/vibrator

    :BangheadI have a 1977 raygo rascal 320a and after setting for about a year and now it wont vibrate, I took the solenoid valves apart and they look free and clean, this system looks really old, why two pumps? Before it all ways worked great and the solenoid on the left side has wires to it and...
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    Problem with a 1977 ratgo rascal compactor/vibrator

    I have a 1977 raygo rascal 320a and after setting for about a year and now it wont vibrate, I took the solenoid valves apart and they look free and clean, this system looks really old, why two pumps? Before it all ways worked great and the solenoid on the left side has wires to it and the...
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    Problem with a Kobelco SK300LC mark IV

    Hello I am new to this forum and was very excited to find it, I have been a heavy equipment mechanic for many years, I have a Kobelco SK300LC mark IV sn:ycu0756. I installed a thumb and two-way auxiliary valve, and finding info on this mark IV is not easy, I bought the factory service Manuel...
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