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Oil and gas drilling is a complex task that requires specialized power generation equipment. Cat 3500 power modules are specifically designed for drilling operations of electric AC rigs. They combine decades of field experience of the 3500 platform with technology in electronics to ensure highest performance, low emissions, and simplified operator interface. Cat power modules are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. 3508B land drilling power module rating: 835 ekW (1194 kVA) @ 50 Hz (1500 rpm). Not emissions certified, available for non-regulated areas.

Engine Specifications

Minimum Rating 835.0 ekW 835.0 ekW Less
Maximum Rating 835.0 ekW 835.0 ekW Less
Emissions Non-certified Non-certified Less
Weight 33846.0 lb 15352.0 kg Less
Generator SR4B SR4B Less
Oil Change Interval 500.0 h 500.0 h Less
Fuel System EUI EUI Less
Displacement 2111.0 in³ 34.5 l Less
Bore 6.69 in 170.0 mm Less
Engine Control and Protection ADEM A3 ADEM A3 Less
Stroke 7.48 in 190.0 mm Less
Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled Less
Voltage 600 600 Less


Width 91.3 in 2319.0 mm Less
Height 102.2 in 1596.0 mm Less
Length 196.3 in 4986.0 mm Less

Capacity for Liquids

Lube Oil System - Refill 60.0 gal (US) 227.1 l Less
Cooling System - Engine 27.0 gal (US) 103.0 l Less


- E-stop pushbutton on instrument panel - Air shutoff and explosion relief valves available - Configurable alarm, derate, and shutdown set points - Extra alarms, inputs, and outputs available

Custom Packaging

For any petroleum application, trust Caterpillar to meet your project needs with custom factory generator sets and mechanical packages. Cat engines, generators, controls, radiators, and transmissions can be custom designed and matched in collaboration with our local dealers to create unique solutions. Custom packages are globally supported and are covered by a one year warranty after startup.


- Every Cat generator set is full-load tested to ensure proper engine performance. - Generator sets are assembled, tested, and validated as a package to ensure performance, reliability and durability.

Product Support Offered Through Global Cat Dealer Network

- More than 2,200 dealer outlets - Cat factory-trained dealer technicians service every aspect of your Cat petroleum product - Worldwide parts availability, service, and warranty - Preventive maintenance agreements available for repairbefore- failure options - S•O•SSM program matches your oil and coolant samples against Caterpillar set standards to determine: • Internal engine component condition • Presence of unwanted fluids • Presence of combustion by-products • Site-specific oil change interval

Over 80 Years of Engine Manufacturing Experience

Ownership of these manufacturing processes enables Caterpillar to produce high quality, dependable products.

Web Site

For all your petroleum power requirements, visit www.catoilandgasinfo.com.

3508B Standard Equipment

Air Inlet System
  • Corrosion-resistant aftercooler core
  • Regular duty air cleaner
  • Service indicator

Control System
  • ADEM A3 ECU, left-hand mounted

Cooling System
  • Separate-circuit aftercooled
  • Outlet controlled jacket water thermostat
  • Jacket water pump - gear driven
  • Dual outlet
  • Aftercooler water pump - gear driven
  • Aftercooler water thermostat

Exhaust System
  • Dry exhaust manifold
  • Dual turbochargers, water cooled bearings
  • Exhaust flexible fitting, adapters, and flanges

Flywheel and Housing
  • SAE No. 00 flywheel
  • SAE No. 00 flywheel housing
  • SAE standard rotation

Fuel System
  • Fuel filter simplex (LH) with priming pump (LH)
  • Fuel transfer pump
  • Flexible fuel lines
  • Electronic unit injectors

  • SR4B generator
  • Twin-bearing, close-coupled
  • Form wound, class H insulation, 80/40 temperature rise
  • Permanent magnet excitation

  • Emergency stop button
  • Service port connector
  • Customer connection terminal blocks
  • Electronic instrument panel
  • Analog instrument gauges:
  • Digital display readouts:

Lubrication System
  • Crankcase breather
  • Oil cooler
  • Simplex oil filter
  • Shallow oil pan
  • Oil drain extension, 2 in NPT female connection

Mounting System
  • Oilfield base 7.85 m (25 ft 9 in) length. Heavy-duty land rig inner base frame — three-point mount to oilfield base

Power take-offs
  • Accessory drive

Protection System
  • Engine alarms, derate, and shutdown in abnormal operation

Starting System
  • Air starting motor
  • Air silencer

  • Paint - Cat yellow
  • Vibration damper and guard
  • Lifting eyes
  • Lift and cable two provisions

3508B Optional Equipment

Air Inlet System
  • Heavy duty air cleaner
  • Remote air inlet adapters

Control System
  • Load sharing governor, 2301A
  • Load sharing module
  • Governor conversion to 0-200 mA direct rack control

Cooling System
  • Radiator, high gloss black conventional core radiator. Includes radiator, blower fan, fan drive, fan pulley, belt guard, radiator guard, cover, water level switch gauge, coolant level sensors

Exhaust System
  • Exhaust elbows
  • Exhaust mufflers

Fuel System
  • Primary fuel filter

Generator and Attachments
  • Low voltage extension box
  • Potential and current transformers
  • Air filter
  • Cable access box
  • Bearing RTDs

  • Customer management device
  • Gauges and instrumentation panels
  • Switches and contactors

Lubrication System
  • Crankcase fumes disposal
  • Oil pan accessories

Mounting System
  • Bases

Power Take-off
  • Crankshaft pulley
  • Front stub shaft
  • Charging alternator

Protection System
  • Explosion relief valves (3)
  • Shutoffs
  • Switches and contactors

Starting System
  • Manual air starter
  • Air pressure regulator

  • Engine barring group
  • Jacket water heater