My Question: Why do excavators use such complicated drive motors ?

excavator

Frequently Asked Question:

Why do excavators use such complicated drive motors ?

I don’t mean the system, I mean the hydraulic motor itself. Mine cost 5k$ each and they have a lot of moving parts that wearout. A simple gear motor cost much less.

Answer by sixfour76
Actually, the drive system is relatively simple. You have a single engine running a hydraulic pump, and two hydrostatic drive motors on the track system that propel the machine. Beyond that you have two control handles that are tied into the main hydraulic valves with either electronic controls or pilot hydraulics that open and close valves to move the hoe. There are a lot of hoses, but the system itself is really pretty simple in design once you understand it.

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