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C4.4 Well Servicing HazPak

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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  • Lube Oil System (refill) 7.4 qt
  • Cooling System 26.0 qt
  • Minimum Rating 52 BHP
  • Maximum Rating 151 BHP

Call 440-838-7348 for rate information

Capacity for Liquids

  • Lube Oil System (refill)
    7.4 qt
  • Cooling System
    26.0 qt
  • Lube Oil System - Refill
    7.4 qt (US)
  • Cooling System
    26 qt (US)

Package Specifications

  • Minimum Rating
    52 BHP
  • Maximum Rating
    151 BHP
  • Peak Torque - Speed
    273 N•m (201 lb-ft) @ 1500 rpm
  • Displacement
    265.5 in³
  • Aspiration
    Naturally aspirated or turbocharged-aftercooled
  • Governor and Protection
  • Weight - Net Dry - Approximate
    2138 lb
  • Oil Change Interval
  • Rotation from Flywheel End
  • Flywheel and Flywheel Housing
    SAE 3
  • Stroke
    5 in
  • Bore
    4.13 in
  • Emissions
    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

Standard Equipment:

  • Air Inlet System
    • 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
  • Cooling System
    • Closed cooling system with air blast radiator and charge air cooling, marine radiator with full solderdipped core, radiator cooled packages sized for 45°C ambient air temp, gear-driven centrifugal jacket water pump, de-aeration expansion tank, exhaust gas heat exchanger (cooler), additional heat load from exhaust heat exchanger included in cooling circuit
  • Exhaust System
    • ATEX designed and tested exhaust system, compliant to EN 1834-1; comprised of exhaust gas heat exchanger (cooler); stainless steel flame arrestor; stainless steel spark arrestor; water-cooled exhaust manifold, watercooled turbocharger
  • Fuel System
    • Mechanical fuel injection, primary fuel filter/water separator with 1/4” BSPP connectors (LH), secondary fuel filter (LH), fuel priming pump manual, fuel shutoff valve
  • General
    • Package ambient capability is -20°C to 45°C; mechanical systems are designed for Gas Group IIA; electrical systems are designed for Gas Group IIC; all systems meet temperature class T3 (200°C limit); includes a declaration of conformity for the entire package scope; radiator package, engine, and exhaust system fitted to sub-frame; air filter, fuel/water separator, remote oil filter installed and mounted; earth bonding per standard EN 60079-14
  • Lube System
    • Oil filter (LH), dipstick (LH), fs disposal (closed system)

Optional Equipment:

  • Air Compressor
    • Single cylinder, 225 CC with head unloader
  • Charging System
    • 12V, 45A alternator with 75AH battery pack
    • 24V 16A alternator with 75AH battery pack
    • 24V 25A alternator with 75AH battery pack
  • Control System
    • Local panel at side of engine, includes: coolant temperature gauge, lube oil pressure gauge, exhaust gas temperature gauge, exhaust gas backpressure gauge, engine speed gauge, stop switch
  • Exhaust System
    • 18 dBA spark arrestor/muffler, ATEX approved
  • Fuel System
    • Fuel cooler, installed, maintains acceptable fuel temperature when running from day tank
  • Starting System
    • Air, electric, and hydraulic starters available
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