Hydraulic breaker JMHB

for excavatorsdemolitionlow-noise

Overview
Provides impact energy for rock and concrete demolition across a range of excavator sizes. The accumulator-type, fully hydraulic JMHB-H breaker is engineered to deliver controlled blow frequency and energy for various jobsite conditions.

• Accumulator-type
• 100% hydraulic operation
• Compact range: light and simple design
• Heavy range: dual-mode operation

Features and benefits

• Designed for long life: Mounted automatic lubrication reduces contamination from dust and debris and extends service intervals. Standard on many models.
• Equipped for dependability: Inspection kit included to support routine maintenance assessments; standard with all models.
• Reduced vibration: Shock-dampening box bracket on JTHB-G models and rubber/poly suspension components on JMHB-H and -V models absorb impact and lower vibration transmission to the boom.
• Adaptable and versatile: Two working positions allow adjustment of frequency and energy per blow to suit different rock types and applications.
• Noise reduction: Fully enclosed, sound-dampening housings reduce emitted noise compared with open-style breakers.
• Compact power range: Compact models use a single power cell without heavy tie rods to improve weight-to-power ratio for smaller excavators.
• Standard equipment: Automatic greasing, blank-firing protection, swivel hose couplings and heavy-duty housing are included as standard features.

Resources summary

• Product resources available: downloadable brochure (product literature) and related press release (brochure provided in PDF).

Technical specifications

• Komatsu carriers: PC78 - PC490
• Machine class (st): 4.4 - 66.1
• Machine class (t): 4 - 60
• Operating weight (kg): 365 - 3,261
• Operating weight (lbs.): 804.7 - 7,189.3