Choosing the right hydraulic breaker is what separates an attachment that performs and lasts from one that breaks tools, overheats the circuit or simply does not hit hard enough. The key is not choosing the biggest possible breaker, but one that matches your excavator. In this guide you will find the three machine specifications you need, the real table for our GETCO breakers and the mistakes that cost the most.
Why getting the size right matters
An oversized breaker on a small machine demands more flow than the circuit can provide, loses impact frequency and strains the pump. An undersized breaker on a large machine works at its limit, overheats and shortens piston and bush life. The goal is for your excavator’s flow and pressure to fall within the breaker’s working range.
The 3 machine specifications you need
Before choosing, check your excavator’s technical data sheet (or ask us using the model) and note:
- Operating weight (tonnes): the first filter and the starting point for the breaker class.
- Auxiliary flow (l/min): the flow the machine sends to attachments. It must fall within the breaker’s range.
- Working pressure (bar / kg⁄cm²): confirm that the circuit supplies the pressure the breaker requires.
With these three values, choosing is no longer a guess. If you do not have them to hand, send us your excavator model and we will check them.
Selection table: GETCO breakers by excavator weight
This is the real range of GETCO hydraulic breakers we distribute. Find your excavator weight and check that your flow fits the stated range:
| GETCO model | Excavator weight (t) | Breaker weight (kg) | Tool Ø (mm) | Flow (l/min) | Pressure (kg/cm²) | Blows/min | Impact energy (J) |
|---|---|---|---|---|---|---|---|
| GC-129 | 1.2 – 3.0 | 150 | 45 | 20 – 40 | 90 – 120 | 700 – 1200 | 220 |
| GC-165 | 2.5 – 4.5 | 172 | 53 | 25 – 55 | 90 – 120 | 600 – 1250 | 320 |
| GC-231 | 3.0 – 5.5 | 245 | 60 | 30 – 60 | 100 – 130 | 500 – 1000 | 500 |
| GC-400 | 4.0 – 7.0 | 328 | 68 | 40 – 70 | 100 – 140 | 500 – 900 | 630 |
| GC-450 | 6.0 – 9.0 | 420 | 75 | 50 – 90 | 120 – 150 | 400 – 800 | 970 |
| GC-680 | 7.0 – 14 | 640 | 85 | 60 – 100 | 130 – 160 | 400 – 800 | 1500 |
| GC-1007 | 10 – 15 | 880 | 100 | 80 – 110 | 150 – 170 | 350 – 700 | 2400 |
| GC-1371 | 15 – 18 | 1350 | 125 | 90 – 120 | 150 – 170 | 350 – 650 | 3600 |
Indicative ranges. If your excavator falls between two models, or its flow is at the edge of the range, the right choice depends on the application and circuit: confirm it with our team before buying.
See the full range in our GETCO hydraulic breakers category.
The right tool for each material
The breaker is only half the solution: the tool determines performance. As a general guide:
- Moil point: general use, penetrates rock and compact concrete well.
- Chisel point (flat): ideal for trenches, cutting and layered material.
- Blunt/button point: for very hard rock where impact fragmentation is the goal.
The tool diameter for each model is shown in the table (45 to 125 mm). Using the wrong tool wears bushes and reduces performance.
Common mistakes when choosing and using a breaker
- Choosing by weight and forgetting flow: two machines in the same weight class can have different flows. Always check l/min.
- Fitting a large breaker to a small machine: it strains the pump and affects stability; it does not create useful force.
- Not greasing the tool: the main cause of premature bush and piston failure.
- Forgetting wear-part maintenance: bushes, tie rods, seal kits and pistons significantly extend equipment life.
Spare parts and maintenance that extend service life
A well-maintained breaker lasts for years. We supply hydraulic breaker spare parts (bushes, tie rods, seal kits and tools) and hydraulic breaker pistons for the main brands. If you are still unsure how it works inside, see our guide to how a hydraulic breaker works.
Not sure? We will identify the exact breaker
Tell us your excavator model (or its weight and flow) and the material you will break. We will recommend the GETCO breaker and tool that fit best, without oversizing. Quick WhatsApp response:
👉 Ask us on WhatsApp · Tel. +34 91 871 90 64
Frequently asked questions
Which hydraulic breaker do I need for a 3-tonne excavator?
For a machine of around 3 tonnes, the GC-129 (1.2-3.0 t) or GC-165 (2.5-4.5 t) may fit, depending on the excavator’s auxiliary flow and the application. Check that your l/min falls within the model’s range.
How do I know the hydraulic flow my breaker needs?
Each breaker works within a flow range. Check your excavator’s auxiliary flow in its technical data and choose a breaker whose range includes that value. If flow is too low it hits weakly; if far too high, the circuit overheats.
How often should I grease the breaker tool?
As a general rule, every 2 hours of work, using breaker-specific grease, with the tool supported and pressed against the material. This is the action that best prevents premature bush and piston failure.
Can I fit a large breaker to a small excavator?
It is not recommended. An oversized breaker demands more flow, loses impact frequency, strains the pump and compromises stability. You do not gain useful force.
Which tool diameter corresponds to each GETCO breaker?
They range from 45 mm on the GC-129 to 125 mm on the GC-1371. This is essential information when ordering the correct tools and replacement bushes.
