OUTER CONTROL VALVE BREAKER
EHB Series
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EHB Series External Control Valve Breaker

Product Introduction
YTCT EHB Series hydraulic breakers built with patented External Control Valve (ECV) system inside the breaker mainbody. Beside it stable performace and less oil cost during oepration, EHB series excavator hammers offer more efficiency on the rock breaking, and more easily for the control valve maintance. Each model have accumlator offering bigger impact power and reduce shock on the oil pipes at same time.

The Core Innovation: The External Control Valve

Minimal Excavator Workload

YTCT EHB Series house the control valve outside the mainbody, which reduce the vibration during operation and fluctuating oil temperatures 20%.
 

Cost Saving

Less N2 gas (4.5-6.5) required on the back head, which lead to less oil pressure and oil flow, bring less oil consumption. Saving the cost means increasing the profits to our customers.

Ultra-Fast Reaction

The direct, external mounting minimizes hydraulic line distance. The result is instantaneous valve shifting, providing faster cycle rates and immediate responsiveness the moment the tool touches the material.
 

Simplified Maintenance

Valve assy can be easily accessible. Technicians can diagnose and service the control system without disassembling the heavy, main breaker housing, reducing downtime by hours.

YTCT EHB Series Hydraulic Breakers

YTCT EHB Series hydraulic breakers built with patented External Control Valve (ECV) system inside the breaker mainbody. Beside it stable performace and less oil cost during oepration, EHB series excavator hammers offer more efficiency on the rock breaking, and more easily for the control valve maintance. Each model have accumlator offering bigger impact power and reduce shock on the oil pipes at same time.
Technical Parameters
Model Chisel 
Diameter
Suitable 
Excavator
Operating 
Pressure
Operating 
Oil Flow
Blow
Frequency
Oil Hose
Diameter
Back Cylinder
N2 Gas Pressure
Impact
Energy
mm ton kg/cm2 l/min bpm inch Bar joules
YTCT15G 120 13-18 160-180 85-110 400-900 1 4.5-5.5 4554
YTCT20G 135 19-25 160-180 125-150 400-800 1 4.5-5.5 5118
YTCT30G 150 26-35 160-180 150-190 350-700 1 4.5-5.5 6883
YTCT4OG 160 36-50 160-180 190-260 300-600 1 1/4 4.5-5.5 8829
 
Product Uses
YTCT EHB Series Excavator Rock Breakers Have Reliable Performance on:
  • Demolition: building demolition, bridge and infrastructure demolition;
  • Mining and Quarrying: mainly apply for secondary breaking;
  • Foundation: any asphalt and concrete pavement breaking;
Any other rock/concrete breaking application.
How to Mount a Hydraulic Breaker on an Excavator
FAQs
  • What is the typical lifespan of a hydraulic breaker?
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    With proper maintenance:
    Light duty (occasional use): 5–10 years
    Medium duty (daily use): 3–5 years
    Heavy duty (continuous quarry/mining): 1–3 years before major overhaul
    Regular replacement of wear parts (tools, bushings, seals) extends lifespan significantly.
  • What type of grease should I use?
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    Use a high-quality, lithium-based, extreme-pressure (EP) grease with a viscosity of NLGI #2. Do not use molybdenum disulfide (moly) grease unless specified by the manufacturer, as it can clog internal passages.

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