B4 Side Mount

Operating Weight - With Tool
326.3 lb / 148 kg
Energy Class
272.9 ft·lbf / 370 J
Tool Shaft Diameter
2.1 in / 53 mm

Used for demolition and construction applications.

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Cat® B2-B8 Side Mount Model Hammers Brochure Cat® B1-B9 Model Hammers Parts Reference Guide
Product Specifications
Operating Weight - With Tool 326.3 lb / 148 kg
Energy Class 272.9 ft·lbf / 370 J
Machine Class 3-4 Ton Mini Excavators
Tool Shaft Diameter 2.1 in / 53 mm
Impact Frequency 600-1100 bpm
Minimum Operating Pressure 1491.9 psi / 10286 kPa
Minimum Carrier Weight 6613.9 lb / 3000 kg
Optimal Hydraulic Flow 25-50 lpm (6.6-13.2 gpm)
Overall Width 10.9 in / 277 mm
Overall Length 18.7 in / 476 mm
Overall Height 46.5 in / 1182 mm
Height - Without Tool 32.4 in / 822 mm
Sound Level 128 dB
Mounting Bracket Size Pin On

Mini Excavators

Cat® mini excavators deliver power and performance in smaller, more compact sizes to help you work in a variety of applications. Caterpillar offers a range of mini excavators from 1-10 metric tons to meet your jobsite demands. They are ideal for jobs such as landscaping, utilities, residential construction and others where space may be constrained. With exceptional digging, lifting and swing capacity, Cat mini excavators help you get jobs done faster. A spacious cab and ergonomic controls keep you working comfortably, while a variety of Cat attachments such as augers and hammers provide even more versatility.

Model Net Power Operating Weight Dig Depth
303 CR 23.6 hp / 17.6 kW 7817 lb / 3545 kg 116.1 in / 2950 mm
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