I’ve dealt with suppliers like this for years, not just Bobcat parts source specifically but the whole aftermarket hydraulic ecosystem, and there are a few things that matter way more than the brand name on the box.
When it comes to bigger items like hydraulic pumps or final drives, the real risk isn’t “aftermarket vs OEM.” The real risk is whether the internal tolerances and relief settings match what your machine expects. A pump can physically bolt on and still cause headaches if pressure compensation or displacement specs aren’t correct. That’s why part number verification is everything. Not just matching the machine model, but matching the exact pump variant. Serial number breaks matter more than people think.
Final drives are similar. Most failures I’ve seen weren’t because the aftermarket unit was junk, but because contamination wasn’t addressed. If your old drive failed due to metal contamination and you don’t flush the system properly, you can ruin a new unit in weeks. Then everyone blames the supplier. So if you’re ordering something like that, I’d always replace case drain filters, inspect lines, and make sure the motor isn’t getting debris from upstream components.
Seal kits and hoses are lower risk. A pump or drive is where I pay attention. Warranty support is the other big thing. Dealer pricing often includes diagnostic backup. Aftermarket suppliers usually don’t hold your hand through troubleshooting. That doesn’t mean they won’t stand behind the part, but it does mean you need to be confident in your diagnosis before ordering. If you’re guessing at the root cause, you can burn money fast.
One thing I’ll give credit for to most of these suppliers is availability. When dealer lead time is weeks out, having something in stock can be the difference between a machine running or sitting. That’s usually why people try them in the first place. Personally, I don’t avoid aftermarket hydraulic components, but I do three things every time:
Confirm exact OEM reference number.
Ask about pressure settings if it’s a pump.
Flush or inspect the rest of the system before install.
Do that and most of the horror stories disappear.