Hydraulic Breaker Basics
A hydraulic breaker uses the skid steer's hydraulic pressure to drive a piston that strikes the chisel at high frequency. Impact energies range from 200–800 joules on compact skid steer-rated breakers. The results: concrete, rock, asphalt and compacted fill that would take hours by hand is broken up in minutes.
Matching Breaker Size to Carrier
The critical ratio: breaker weight should typically be 10–15% of the carrier machine's operating weight. An oversized breaker creates excessive stress on the carrier's boom, arm and attachments. An undersized breaker delivers too little impact force to be efficient.
| Machine Operating Weight | Recommended Breaker Weight | Typical Impact Energy |
|---|---|---|
| 2,000–4,000 kg | 200–450 kg | 200–400 J |
| 4,000–7,000 kg | 400–800 kg | 400–700 J |
| 7,000–12,000 kg | 800–1,400 kg | 700–1,200 J |
Hydraulic Requirements
Check your skid steer's auxiliary hydraulic output: flow rate (L/min) and operating pressure (bar). Most compact skid steer breakers require 40–80 L/min and 180–220 bar. Insufficient flow reduces impact frequency and output significantly. Excessive pressure must be regulated — running at too high a pressure damages the breaker's accumulator.
Chisel Selection
Moil point (sharp cone): General purpose — concrete, rock, compacted fill. The most versatile chisel type.
Blunt/truncated: For compacted material (caliche, hardpan). Wide face distributes impact rather than concentrating it.
Flat chisel: For cutting channels, breaking slabs cleanly, or working along a joint line.
Operating Technique
- Hold the breaker perpendicular to the surface — angled breaking wears the chisel bushing rapidly
- Apply downward pressure until the chisel penetrates, then let the impact do the work — don't use the carrier's breakout force to supplement
- Never run the breaker without material contact — "blank firing" damages the accumulator and internal components severely
- Move the chisel every 15–30 seconds — drilling the same point heats the chisel and reduces efficiency
FAQ
How often should I grease the breaker?
Every 2–4 hours of operation during use. The chisel bushing requires high-pressure grease — use the breaker-specific grease specified in your manual. Under-greased chisels wear the bushing rapidly, requiring expensive repair.