Cat® B-Prefix Hammers feature low owning and operating costs, versatility, ease of use

For Worldwide Release: June 2018
Release Number: 131PR18

Cat^® B-Prefix hydraulic hammers, available in B4(s) and B6(s) silenced and B4 and B6 non-silenced versions, are designed for "plug-and-play" operation with a range of compact equipment—while delivering optimum life-cycle value. The new hammers are suited for skid steer loaders, multi-terrain loaders, compact track loaders, mini hydraulic excavators (3- to 8-ton operating weights), and backhoe loaders working in a range of construction and light-demolition applications, including site prep, landscaping, masonry, and concrete breaking. The B-Prefix hammers use a simple design that ensures reliability, versatility, ease-of-use and maintenance. As a package solution, the matching Caterpillar-designed hydraulic kits are also offered and the best fit for Cat machines, providing customers a breaker package with superior design and benefits.

Quality engineered

Design
- Simple, reliable, industry-standard modular design with two moving parts in the piston and valve
- Flat-top mounting enables compact working envelope and compatibility with a full complement of brackets to suit preference of coupler, linkage kinematics, or machine size

Field service
- Bushings are field-replaceable, and lower bushing can be rotated 90 degrees for improved wear performance
- Included toolbox contains charging kit, hammer paste, and spare parts
- Housings are designed to facilitate common maintenance items. Grease fitting and gas pressure check point are easily accessed with hammer on machine

Gas operation
- Gas-fired operation cycle delivers consistent, long-term high production

Major components
- Cylinder, back-head, front-head, piston, and tool are manufactured with high - quality materials and processes

Housings
- Heavy-duty housing construction protects against breakage and wear

Piston
- Piston transfers long shock waves into material; piston diameters are matched for maximum energy transfer; piston design and surface finish provide superior oil retention and seal life

Oil-control valve
- Inward-type oil-control valve has high structural integrity and low failure rate

Mounting brackets
- Interchangeability between H-prefix and B-prefix models

Tool types for the new hammers include moil, cone, parallel and transverse chisel, and blunt, allowing the hammer to be adapted to an extensive range of applications.

Top-Mount Product Specifications

	B4	B4s	B6	B6s
Carrier weight, lb. (kg)	5,600 (2 540) – 7,000 (3 175)	5,600 (2 540) – 7,000 (3 175)	8,000 (3 629) – 12,000 (5 443)	8,000 (3 629) – 12,000 (5 443)
Operating weight, lb. (kg)*	351 (159)	357 (162)	571 (259)	611 (277)
Energy class, ft. lb. (J)	273 (370)	273 (370)	502 (680)	502 (680)
Impact frequency, blow per minute	600 – 1,100	600 – 1,100	500 – 900	500 – 900
Hydraulic flow, gpm (lpm)	7 – 13 (25 – 50)	7 – 13 (25 – 50)	11 – 19 (40 – 70)	11 – 19 (40 – 70)

*Operating weight is Breaker and Tool, without the bracket.

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