The Airman SDG150 delivers 120 kW of prime power from a John Deere 6068 HFG 05 inline-six diesel engine — Airman's first model in the lineup to use a non-Isuzu powerplant, leveraging John Deere's proven 6.8-liter platform for the 150 kVA class. The unit runs 24 hours at full load on its 204-gallon integral tank.
At 66 dBA, the SDG150 operates quietly enough for noise-sensitive urban construction and event applications. Standard 110% fluid containment and Tier 4 Final compliance meet California environmental requirements. The 8,488 lb operating weight puts this unit firmly in the towable trailer class.
The SDG150 is the first model in Airman's portable lineup to use a non-Isuzu powerplant, and the choice of John Deere's 6068 HFG 05 is deliberate. The 6.8-liter inline-six is one of the most proven power generation engines in North America, with thousands of units deployed in standby and prime applications across multiple OEMs. John Deere's dealer network provides parts availability in virtually every Northern California county, which translates to faster turnaround on scheduled and unscheduled maintenance. The 6068 platform's turbocharged aspiration delivers strong transient load response — important for applications like elevator motor starting and HVAC compressor cycling where instantaneous demand can spike well above the nominal load.
The SDG150 is our go-to recommendation for large commercial projects in noise-restricted zones. At 66 dBA, it operates within the daytime noise limits of most Bay Area municipal ordinances, which eliminates the permitting headaches that come with louder units. We deploy the SDG150 on hospital campus renovations, downtown San Francisco high-rise construction, and large-scale outdoor events in Napa and Sonoma where amplified sound systems cannot compete with generator noise.
At 8,488 lbs, the SDG150 requires a dedicated trailer and typically a flatbed delivery rather than pickup towing. The 204-gallon tank and 24-hour runtime align perfectly with daily fuel delivery schedules on major construction sites. The John Deere 6068 has been straightforward to service in our fleet — the engine shares components and procedures with thousands of John Deere power units in the region, so every diesel technician on our team is familiar with the platform. Standard 250-hour oil changes and 500-hour fuel filter replacements keep these units running reliably through multi-month deployments.
Engineering specifications
Physical
Length
113.4 in
Width
51.2 in
Height
72.8 in
Dry weight
6,878 lb
Wet weight
8,488 lb
Acoustic
Sound @ 7m, full load
66 dBA
Enclosure
Sound-attenuated
Fuel system & runtime
Integral fuel tank
204 gal
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Get pricing & lead time on the Airman SDG150
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Estimated runtime
28.6 hours(1.2 days)
Fuel consumption ≈ 7.13 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.
Service intervals
Manufacturer-recommended intervals for the Airman SDG150 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Air filter
Every 500 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours
Common failure modes
What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.
Component
Symptom
Typical hours
Severity
Fuel filter
Clogging from contaminated or stale diesel causes hard starting and power loss — replace at 500-hour intervals or sooner if fuel quality is suspect
500+
minor
Starting battery
Capacity degradation during extended storage without a maintainer — test under load at every service visit and replace proactively at 36 months
4,380+
minor
Coolant hoses
Weeping at clamp points from thermal cycling — inspect during every oil change and replace at first sign of swelling or seepage
5,000+
minor
Frequently Asked Questions
What is the standby rating of the Airman SDG150?
The Airman SDG150 delivers 132 kW standby / 120 kW prime at 60 Hz (150 kVA). It provides switchable single and three-phase output across voltages from 120/240V through 277V and 416/480V, and operates at 66 dBA at 7 meters under full load.
What engine does the Airman SDG150 use?
The SDG150 is powered by a John Deere 6068 HFG 05 — a 6.8-liter turbocharged inline-six diesel running at 1,800 RPM with EPA Tier 4 Final compliance. The 6068 is one of the most proven power generation engines in North America, with dealer support in virtually every Northern California county.
What is Airman's warranty claim rate?
Airman generators are built by Hokuetsu Industries in Japan and carry a documented 0.001% warranty claim rate — the lowest in the portable generator industry. This figure reflects the precision manufacturing standards applied to every unit built at the Hokuetsu facility.
What are the service intervals for the SDG150?
The John Deere 6068 HFG 05 engine in the SDG150 requires oil and filter changes every 500 hours or 12 months (whichever comes first), air filter replacement at 500 hours, fuel filter replacement at 500 hours, and is rated for major overhaul at 20,000 hours.
Is the SDG150 EPA compliant?
Yes. The Airman SDG150 meets EPA Tier 4 Final emissions standards through its John Deere 6068 HFG 05 turbocharged engine. At 66 dBA at 7 meters, it also meets the daytime noise limits of most Bay Area municipal ordinances.
What fluid containment does the SDG150 have?
All Airman generators, including the SDG150, feature 110% fluid containment as standard. The integrated drip tray holds more than the total volume of all engine fluids, eliminating the need for separate secondary containment on California job sites.
Who services Airman generators in Northern California?
OnPoint Generators is the authorized Airman service provider for Northern California. We stock parts, perform warranty service, and offer maintenance contracts for the full Airman SDG lineup including the SDG150.
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