Buying a brush cutter that requires 30+ GPM high-flow hydraulics on a machine that only puts out 21 GPM standard flow is an expensive mistake. Here is the guide that saves you that headache.nn## What Is Standard Flow?nMost skid steers deliver 21-23 GPM at standard flow. This is enough for augers, pallet forks, snow pushers, and basic buckets. Standard flow attachments are labeled 15-25 GPM and will run on virtually any modern skid steer.nn## What Requires High Flow?nBrush cutters, forestry mulchers, drum mulchers, and high-torque auger drives typically require 25-40 GPM. These attachments have larger hydraulic motors that need the extra volume to operate at rated RPM. Running a high-flow attachment on standard flow will either stall the attachment or cause the hydraulic system to overheat.nn## How to Check Your MachinenYour skid steer operator manual lists hydraulic flow in GPM under specs. Bobcat calls it Hydraulic Flow – High Flow and Hydraulic Flow – Standard. For CAT machines, check the D-Series vs standard spec sheet. If you are buying used and have no manual, your dealer can check.nn## The RulenAny attachment rated above 25 GPM requires high-flow. When in doubt, call us with your machine model and the attachment you are considering. We confirm compatibility before the order ships.
