New Cat® GC S Series Hydraulic Hammers Increase Efficiency and Lower Costs


New Cat® GC S Series Hydraulic Hammers Increase Efficiency and Lower Costs

For Release in Europe, Israel, Turkey: February 2019 
Release Number: 63PR19

The new Cat® GC S Series top-mount, hydraulic, silenced hammers from Caterpillar Work Tools—models H115 GC S, H120 GC S, H130 GC S, and H140 GC S are specifically designed for hydraulic excavators with operating weights from 13 to 40 tons.

The new GC S Series models combine optimum power-to-weight ratios with design simplicity to ensure reliable performance, versatility, ease of use, convenient maintenance, and cost-effectiveness in a range of applications—including municipal, general construction, demolition, quarry, and mining. As a package solution, Caterpillar designed hydraulic kits are available to provide an exact hammer-to-machine fit for Cat models, ensuring optimum performance

Key Features & Benefits 

Gas fired design: The Cat GC S Series hammers provide customers optimum impact power and reduced owning & operating costs. The gas-fired operating cycle delivers a constant reliable performance, maximizing hammer efficiency.

Automatic Shut-Off: This feature provides blank-firing protection by stopping the piston from cycling internally when no material is under the tool. Eliminating blank firing protects the hammer by reducing internal stress and heat, which results in lower overall owning & operating costs. Additionally, the automatic shut-off feature helps protect rental-fleet hammers, which typically are used by operators with varied levels of expertise.


As a standard feature, GC S Series hammers feature a protective, enclosed housing, designed to lower the noise level for the operator, as well as for the overall job site. In addition, GC S Series incorporates features that buffer the effect of pressure spikes in the carrier's hydraulic system and reduce shock loads on the carrier's front linkage also serve to attenuate noise levels.

Auto-Lube options: The most critical maintenance requirement for hammers is adequate lubrication (hammer paste). To eliminate manual greasing, automatic-lubrication systems are available for GC S Series hammers. Customers have the option of installing either a carrier-mounted or hammer-mounted system.

Top-mount (rectangular): The top-mount design of GC S Series hammers increases impact power by ensuring that hammer force and stick force are consistently in line. The top-mount style also provides a larger work area and enhances visibility for the operator. A further benefit of the design results from the top-mounted bracket transferring considerably less force into the end of the stick, reducing both potential bending stress and overall impact on carrier structures.

Standard supplied accumulator: A high-pressure accumulator is standard with GC S Series hammers, factory supplied and field serviceable. The accumulator helps protect the carrier hydraulic circuit by absorbing pressure spikes created during the firing stroke.

Stroke Adjuster: Hammer speed/frequency can be easily adjusted to match specific applications and materials to provide optimum productivity.

Reliability and Durability: The design, manufacturing practices, quality inspections, and testing of GC S Series hammers ensures durability in tough applications.

Matched for Cat machines: GC S Series hammers are designed with mounting brackets specifically matched to Caterpillar linkages ensuring optimal compatibility with Cat machines.

Easy maintenance: Full length side plates on GC S Series hammers provide ready access to service points. Also, field-maintenance capability for tools and bushings, plus field-replaceable lower-tool bushings added overall customer value in terms of daily operation and maintenance.

Comprehensive support: GC S Series hammers are fully supported by Cat dealers. Customers can order parts and service for machines and work tools from a single source. Every Cat work tool is supported with a comprehensive range of pre- and after-sales services, including advice about work-tool selection, operator training, equipment management, and a range of financial and insurance solutions.



Hammer Model

H115 GC S*

H120 GC S*

H130 GC S*

H140 GC S*

Recommended carrier weight, (pounds)

13-18 tonnes (28,600-39,600)

18-25 tonnes (39,672-55,100)

25-32 tonnes (55,100-70,500)

30-40 tonnes


Max. operating weight**

1330 kg

1780 kg

2500 kg

3100 kg

Impact frequency (blow per minute)

450-800 bpm

400-800 bpm

350-700 bpm

250-550 bpm

Energy class (Joules)

3,000 J

4,000 J

5,000 J

6,000 J

Operating pressure

15000-17000 Kpa

16000-18000 Kpa

16000-18000 Kpa

16000-18000 Kpa

Tool diameter (in.)

120 mm (4.7)

135 mm (5.3)

150 mm (5.9)

153 mm (6.0)

*S: Silenced

**including hammer, standard tool and average mounting bracket

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Note to Editors: Caterpillar rolls out products and services in each of its territories at different time intervals. Although every effort is made to ensure that product information is released only after Caterpillar has received confirmation from our dealer network, our plants, and our marketing subsidiaries that products and services are available in the relevant region, editors are kindly requested to verify with their local dealer for product availability and specifications.

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