Hitachi Compatible SM135 Top Type Hydraulic Breaker | High-Performance Stone Hammer
Product Description
Key Features & Advantages
1. Superior Top Type Design: The top-type structure offers a longer total length and optimized center of gravity. This design makes it significantly more convenient for vertical excavation and demolition work, while the balanced weight distribution reduces the risk of chisel breakage.
2. High-Efficiency Accumulator System: Equipped with a high-performance accumulator, the SM135 effectively compensates for pressure fluctuations in the hydraulic circuit. This prevents pulsation, protects the carrier's hydraulic pump, and ensures consistent striking force.
3. Premium Alloy Steel Chisel: Our chisels are manufactured from select alloy steel raw materials. Through high-precision deep heat treatment, the tool achieves exceptional heat and wear resistance, allowing for continuous operation in the harshest environments.
4. Durable Main Valve & Piston: The precision-machined piston and cylinder reduce internal resistance and improve efficiency. A specialized damping system reduces recoil force, protecting the excavator boom while increasing the overall blow force.
5. Energy-Saving Nitrogen Chamber: The compact Nitrogen chamber design ensures stable pressure and high-impact energy output. This optimized system reduces energy consumption without compromising the hammer’s destructive power.
6. Robust Box Shell Structure: The durable welding structure provides perfect protection for the cylinder and bushings. Full sealing measures prevent dust from entering the system, significantly extending the service life of the internal components.
Applicable Fields
Mining: Primary and secondary breaking in quarries and open-pit mines.
Metallurgy: Slag clearing and demolition of furnace foundations.
Road Construction: Road repairing, pavement breaking, and foundation work.
Railway & Tunneling: Tunnel excavation and bridge demolition.
Construction: Demolition of reinforced concrete buildings and structures.
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Ship Repair: Clearing clam and rust from ship hulls.
Applicable Excavator:
Technical Data Sheet
| Item | Unit | Technical Data |
| Operating Weight | kg(ibs) | 1,695 (3,729) |
| Operating Pressure | kgf/cm2(psi) | 160 ~ 180 (2,275 ~ 2,559) |
| Oil Capacity | L/min(gpm) | 120 ~ 150 (31.7 ~ 39.6) |
| Impact Rate(Blows) | bpm | 400 ~ 800 |
| Impact Energy | Joules(ft ibs) | 3,360 (2,470) |
| Chisel Diameter | mm(inch) | 135 |
| Suitable Excavator | ton | 20~26 |
Hydraulic Breaker Operation in Cold Weather
Q1: Why does my hydraulic breaker leak oil only in winter?
In cold weather, temperature differences between the breaker housing and internal components can cause temporary thermal contraction. Newly installed oil seals may develop small clearances under these conditions, leading to minor oil seepage. This is usually temporary and improves after proper warm-up.
Q2: Is oil leakage after replacing a new seal a quality problem?
Not necessarily. New seals made of NBR rubber require proper operating temperature to achieve full elasticity and sealing performance. Minor leakage during cold conditions does not indicate a manufacturing defect in most cases.
Q3: Should hydraulic breakers be preheated like excavators?
Yes. Hydraulic breakers rely on hydraulic oil pressure and dynamic sealing. Without preheating, cold oil and rigid seals can increase wear, reduce sealing efficiency, and shorten service life.
Q4: How long should I preheat a hydraulic breaker in winter?
There is no fixed time. Preheating should continue until hydraulic oil temperature rises and the breaker operates smoothly without abnormal noise or vibration. Light, controlled impacts are recommended during this stage.
Q5: Can improper preheating damage the chisel or breaker?
Yes. Operating a breaker under full load with cold oil can cause excessive stress on the chisel, piston, and seals, leading to premature wear, cracks, or internal damage.
Q6: Does this issue apply to all hydraulic breaker brands?
Yes. Thermal contraction and sealing principles are universal. This phenomenon can occur across all hydraulic breaker brands when operating in cold climates without proper warm-up procedures.
For more hydraulic breaker operation and maintenance knowledge, visit:
**[https://www.slymmachinery.com/winter-hydraulic-breaker-preheating-guide.html)**
Technical FAQ
Q1: Why is my hydraulic oil turning black?
The Technician's Answer: "Black Oil" is a warning sign that contaminants are entering your system. This is usually caused by two things:
Aged Seals: If you haven't replaced your seal kits in over 6 months, the rubber begins to wear down into microscopic black particles.
Clogged Exhaust Screw: If the breather/exhaust screw is blocked by a mix of grease and dust, the waste cannot escape and gets forced back into the hydraulic circuit.
Solution: Replace the seal kit immediately and clean the exhaust screw with solvent.
Q2: My hydraulic hoses are jumping or vibrating violently. What's wrong?
The Technician's Answer: This is a classic symptom of a gas leak. When the nitrogen (N2) pressure in the back head or accumulator is too low or has leaked out entirely, the breaker loses its "cushion," causing the hydraulic oil to pulsate violently through the hoses.
Solution: Stop operation immediately. Check the nitrogen pressure and refill to the levels specified in your SLYM manual.
Q3: Why did my chisel (tool) or piston chip/break at the striking face?
The Technician's Answer: This is almost always caused by excessive clearance.
Check the gap between your chisel and the bushing. If it is greater than 5mm, the chisel will "tilt" or wobble inside the hammer.
When the piston hits a tilted chisel, the force is concentrated on one edge rather than the center. This causes "pitting" or metal chunks to fly off.
Solution: Replace bushings once they hit the 5mm wear limit.
Q4: My hydraulic breaker has lost power and is hitting "weak." Why?
The Technician's Answer: Before blaming the cylinder, check these three things:
Nitrogen Pressure: Too much gas pressure can actually prevent the piston from traveling its full stroke; too little gas reduces the impact force.
Oil Temperature: If your oil is overheating (above 80°C), it loses viscosity, leading to internal pressure bypass.
Worn Seals: Internal leakage across the piston seals will reduce the striking power significantly.
Q5: What causes the tie-rods (through-bolts) to snap?
The Technician's Answer: The #1 killer of through-bolts is "Dry Firing" (firing the hammer without pressure on the chisel) or improper torque.
When you dry fire, the energy that should go into the rock goes into the hammer's own bolts and pins instead.
Solution: Ensure operators apply firm downward pressure before triggering. Check bolt torque every 50 operating hours.
Q6: How should I store my hydraulic breaker for the winter or off-season?
The Technician's Answer: Never leave it exposed to the elements.
Push the Piston Up: This is the most important step. By pushing the piston into the cylinder, you keep the polished metal surfaces coated in oil and safe from rust.
Bleed Nitrogen: This makes it easier to retract the piston and saves the seals from constant pressure.
Plug the Ports: Use steel plugs on all hose connections to keep moisture out.
Need more help?
If your issue isn't listed here, our technical team is ready to assist.
Email: info@slymmachinery.com
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