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I'm trying to track down a hydraulic diagram or pump manual (PDF) for a Sumitomo S280F2 and am not having much luck so far. I recently got my hands on one and want to better understand the hydraulic system layout, pump specs, and troubleshooting basics before I start digging into any repairs...

The Kenworth T880 and Peterbilt 567 are still top choices! By the way, most fuel fleets still run aluminum.

Right now? I lean toward Boom & Bucket-clean listings, less guesswork.

Watch the brakes because some machines won't move if they're locked

I've used Veritread a few times, moving excavators and a mid-size dozer, overall pretty good, just have to know how to work it.

Most failures come from chafing or tight bends.

It replaces a lot of the old back-and-forth (calling dealers, digging manuals, guessing part numbers).

I used to think SmartEquip was just a parts catalog, too, but it actually makes money in a few indirect ways.

I've been running a 1 series for a while, and honestly, this update on the John Deere 1 series looks like Deere is finally addressing the stuff people actually complain about.

Treat it like a marketplace-you'll get good deals, but only if you take a little time to compare and ask questions.

Can you tell me more about the Ritchie Bros Financial Services?

Seen this before where everything "looked right," and it ended up being a faulty NOx sensor keeping it in derate.

Trying to troubleshoot my Bobcat 334. It was working fine, then suddenly the swing kept going one way, and now I've got no swing in one direction at all. All other functions are strong, no visible leaks. Could this be a swing motor, relief valve, or sticking control valve issue? Just trying to...

I'm still learning my way around electrical troubleshooting and could really use some help on my JLG E300AJ. Everything else works fine, but I've completely lost forward and reverse drive. I'm getting a 7740 code that points to the shunt circuit. I already checked the wiring and continuity, and...