I could use some insight on this one. Working on an old Clark EC50- had hoist cyl rebuilt (the triple telescoping cyl) & it started leaking again- long story short- found metal shavings in hyd oil inside cyl. I drained the hyd tank & found more metal shavings. This unit has a suction filter to the hyd pump- no return filter. Truck has no other symptoms- lifts to capacity & makes no unusual noises. Any insight? Anyone ever had this before? Though I'd ask before tearing into the hyd system- thank you