When the job takes you into a hazardous location, Cat® HazPak engines are ready. Our complete range of services and engine packages cover both industry standards and your operation with maximum safety. Cat C4.4 HazPaks are hazardous location power units that are the ideal solution for specialized and demanding operations in the oilfield. Units are hazardous-location certified from the factory to minimize installation design, time, and cost. HazPaks are certified to operate in potentially explosive environments. Cat hazpaks are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. Cat C4.4 HazPak. Rating: 39-112 bkW (52-151 bhp) @ 1500-2200 rpm.

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Package Specifications
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Minimum Rating 52.0 BHP 39.0 bkW
Maximum Rating 151.0 BHP 112.0 bkW
Peak Torque - Speed 273 N•m (201 lb-ft) @ 1500 rpm 273 N•m (201 lb-ft) @ 1500 rpm
Displacement 265.5 in³ 4.4 l
Aspiration Naturally aspirated or turbocharged-aftercooled Naturally aspirated or turbocharged-aftercooled
Governor and Protection Woodward Woodward
Weight - Net Dry - Approximate 2138.0 lb 970.0 kg
Oil Change Interval 500 500
Rotation from Flywheel End Counterclockwise Counterclockwise
Flywheel and Flywheel Housing SAE 3 SAE 3
Stroke 5.0 in 127.0 mm
Bore 4.13 in 105.0 mm
Emissions U.S. EPA Marine Tier 2, CCNR Stage 2 U.S. EPA Marine Tier 2, CCNR Stage 2

Making Your Investment Work Harder

• Factory-certified package for hazardous location applications allow simplified rig certification for OEM • Maintains high power over broad range of operating speeds, improving performance • Steady torque rise provides superior load acceptance • Optimized ambient and altitude capabilities for operating flexibility

Committed to Sustainable Development

• Meets today's emission standards for well service applications - CCNR Stage 2/U.S.A. 40 CFR Part 94 Marine Tier 2

Driving Down Total Cost of Ownership

• Improved serviceability versus the competition • Industry-leading component overhaul life • Rugged Caterpillar testing on all components improves uptime

Product Support Offered Through Global Cat Dealer

• More than 2,200 dealer outlets • Caterpillar factory-trained dealer technicians service every aspect of your petroleum package • Caterpillar parts and labor warranty

Web Site

For all your petroleum power requirements, visit

Web Site

For all your petroleum power requirements, visit

C4.4 HazPak Standard Equipment

Air Inlet System
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  • ATEX designed and tested inlet system, compliant to EN 1834-1; stainless steel flame arrestor; integrated air shutdown valve, activates on overspeed and emergency stop; available in hydraulic, pneumatic, electric configurations; air cleaner, single element canister type with service indicator and rain cap; dry aluminum compressor housing

C4.4 HazPak Optional Equipment

Air Compressor
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  • Single cylinder, 225 CC with head unloader