Does anyone have any history with installing a high pressure filter ahead of the hyd control valve? Customer wants a "cheap fix"- this isn't my first choice but "the customer is always right"!

The model & serial EC50ESG-154-2137. If anyone would have a hyd. schematic that would be great- thanks

with no return filter those shavings always wind up in the tank.
systems today use the return filter to catch these kind of things but in the older systems they just used the inline filter to keep it out of the pump just in case there were trash in the tank.

examine them and determine if they are steel or aluminum shavings first. My best guess would be either an attachment cylinder or like was mentioned... a steering cylinder. But in all honesty it could of come from anything moving in that system.

those cylinders are a pain regardless of the metal shavings.

I have heard, not seen, of steer pistons coming apart and contaminating the system. Do you complete model and serial number? On some of the older truck the steer system my have a dedicated return line to the tank.

Thanks L1ftmech- I didn't rebuild the cyl myself- I had my local hyd vendor do it. I trust their work- been using them for 15 years. I do believe they probably just ripped it apart the first time, not being overly observant, but after being apart 3 times, they looked thru it with a fine tooth comb. There was no gauging or physical issues with the cyl itself.

I'm thinking either a hyd pump or control valve, but with no symptoms I'm stumped. I'm gonna have to perform a search & destroy :)

I wish I could give some insight on that but anything I might know, you probably already have covered.

Did you handle the rebuild of the mast cylinder yourself?
I ask because if you did, you would/should know the condition of the cylinder bores and pistons.
If you farmed that out, did the rebuilder indicate any damage or defective conditions to any parts?
The only other things I can think of would involve shavings shed from pump parts migrating throughout the entire system. If that were the case, I would think there would be other cylinders showing some issues too (unless they have issues already in the works).
For the problems (shavings in tank and leaking lift cylinder) to have been in the lift cylinder before the rebuild, and the same problems persisting with the same cylinder affected............that is almost too much for me to think "coincidence".