The Atlas Copco QAS 70 ID T4F generators are prime power, multi-voltage, sound attenuated, mobile generators. They are powered by an Isuzu Tier 4 Final, liquid-cooled, four cylinder diesel engine.

The units consist of an alternator, diesel engine, cooling system, electrical distribution and control systems - all enclosed within a sound attenuated enclosure fabricated from powder coated galvannealed steel. A broad range of undercarriage formats and options are available. Special attention has been given to the overall product quality, user friendliness, ease of serviceability, and economical operation to ensure best in class total cost of ownership.

View and/or Download QAS 70 ID T4F: Datasheet / Brochure


  • Compact, sound attenuated, corrosion resistant enclosure with single point lifting and 110% fluid containment
  • Available as a skid mounted unit with forklift pockets, or on a single axle trailer
  • Heavy Duty alternator with AREP excitation and marine grade protection
  • DeepSea controller
  • Single side servicing with long run filters and 500-hour service intervals
  • Extremely reliable and durable Isuzu 4JJ1X engine with DOC &SCR after-treatment and limited 5 year limited warranty
  • Identical enclosures and maintenance points between both models
  • Emergency Stop
  • Remote Start / Stop


  • Extremely durable and environmentally sensitive designed to be used for everything from the oil patch to special event power
  • Versatility, giving you the flexibility to match your machine to the correct application
  • Start-up power for the most demanding sites with 300% over load starting capabilites
  • Reliable and intuitive controls for ease of use and diagnostic capabilities
  • Reliable and intuitive controls for ease of use and diagnostic capabilitites
  • Heavy duty oil, air and fuel filters extend the maintenance
  • interval to 500 hours for reduced total cost of ownership 
  • Reduces maintenance costs with long intervals easy access for mechanics  Proven engine platform with high reliability, a simple
  • maintenance free Diesel Oxidization Catalyst only after treatment 
  • Reduces stock of service kits and inventory of parts with rental ROI kept in mind  External, recessed emergency stop for increased safety 
  • Allows connection as a critical back-up unit via a 2 wire dry contact connection in the distribution panel


Performance  Units QAS 70 ID 
Frequency  Hz  60 
Rated prime power 3ø  kW/kVA  56 / 70
Rated standby power 3ø  kW/kVA  60 / 75
3ø Power factor    0.8 
3ø Voltage in 480V switch position (series star w/neutral)  480Y / 277 
Amp capacity @480V  84 
3ø Voltage in 240-208V switch position (parallel star w/neutral)  240YY / 139-208YY 

Rated Prime Power @ 240V 3Ø


55 / 69

Amp capacity @240V  166 

Rated Prime Power @ 208V 3Ø


51 / 64

Amp capacity @208V  177 
Rated prime power 1ø  kW/kVA  31/31
1ø Power factor   
1ø Voltage in 120-240V switch position (Zig-Zag)g-Zag)  240 / 120 
Amp Capacity @240V  130 
Amp Capacity @120V  130 x2
Alternator (4 Pole, 12 Wire) Leroy Somer LSA 42.3 l9
Excitation system   AREP (auxiliary winding)

Digital Automatic Voltage Regulator (+/- 0.25%)

Leroy Somer D350
Insulation   Class H
Main Breaker - Shunt Trip A 200
Power Distribution - Rated Current in   5 Wire (L1, L2, L3, N, Ground)
Terminal Board Connections   Bare Wire Terminals
Maximum Terminal Cable Size   350MCM
Convenience Receptacles   2 x NEMA 5-20R & 2 x 125/250V 50A CS6364 
Engine  Units QAS 70 ID
Model    4JJ1X
US EPA Family   


US EPA Tier    Tier 4 Final
Displacement  L 2.99 
Cylinders  # 4
Continuous engine output  HP (kW) 88 (65.5)
Gross engine power output  HP (kW) 95 (71)
Rated Speed RPM 1800
Engine control    ECU
Aspiration    Turbo w/Intercooler
Engine oil capacity  US gal 3.7 (14)
Engine coolant capacity  US gal 1.6 (6)
Max. ambient temperature (@Sea Level) 

°F (°C)

122 (50)
Min. starting temperature (Without coolant heater on)

°F (°C)

14 (-10)
Min. starting temperature (With coolant heater on)

°F (°C)

-4 (-20)
Electrical system (Negative ground)  V 12
Engine alternator output  A 110
Battery Capacity (Cold Cranking Amps)  A 1100
Sound Pressure Level @ 23’(7 m) @ 75% Load dB(A) 67
Fuel and DEF Systems Units QAS 70 ID

Fuel Consumption @ 25% load

Gal/hr (L/hr)

1.41 (5.34)

Fuel Consumption @ 50% load

Gal/hr (L/hr)

2.54 (9.61)

Fuel Consumption @ 75% load

Gal/hr (L/hr)

3.95 (14.95) 

Fuel Consumption @ 100% load

Gal/hr (L/hr)

3.95 (14.95)

Fuel Type


Ultra-Low Sulfur Diesel ONLY

Fuel Tank Capacity

Gal (L)

110 (416) 

Fuel Autonomy @ 75% load



DEF Tank Capacity

Gal (L)

7.4 (28.0) 

Applications & Use Cases


These light pneumatic rock drills have been designed especially for the dimension stone industry, drilling holes of 27-41 mm.

During the mining process, machines such as excavators, drillers, cranes, and conveyor belts use a lot of electricity. No matter what type of mining is taking place, Atlas Copco's QAS 70 diesel generator is the best choice as it is portable and can be utilized in remote and extreme mining zones.


Atlas Copco Portable Energy - DSC 0104

Outdoor events with big tents, lighting and all sorts of machinery running from vendors will require power from a mobile generator. Atlas Copco’s QAS 25, 45 or 70 diesel generators are a great fit for events as they are silent, compact and towable. There are also convenience receptacles as standard to use in single phase 120V outlets, California style 240V outlets, or Camlocks as an option.


Construction site with QAS 40 and XAS 97

During construction at remote sites, the power supply from a mobile diesel generator is essential. Because our QAS 25, 45, and 70 models are mobile and compact, construction crews rely on them for power during the whole project due to its reliability and transportability.

Applications & Use Cases

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