I got a CAT 305 with articulated arm. The stick boom initially leaked badly. Got them resealed and were good for a couple of weeks. However, it started leaking again. We are pretty sure that the cylinder shaft is in good condition( no scratches dents whatsoever). Would love to know what might be causing the leak. Thanks
First question. What brand of replacement seals did you use.? Is there any chance you installed one of the replacement seals in the head the wrong way round.?