DJI Agras T40
About the DJI Agras T40
DJI Agras T40 is an agricultural spraying and spreading aircraft with a 40 L spray tank and 70 L spread tank. DJI specifies 38 kg without battery, 50 kg with battery, and maximum takeoff weights of 90 kg for spraying or 101 kg for spreading at sea level. With a 30,000 mAh battery, DJI lists 18 minutes of hovering at 50 kg, 7 minutes at 90 kg while spraying, or 6 minutes at 101 kg while spreading. Its O3 Pro controller link is rated up to 7 km FCC, 5 km SRRC or 4 km CE/MIC/KCC at 2.5 m aircraft altitude, unobstructed and interference-free.
Technical Specifications
| Weight | 38 kg without battery; 50 kg with battery |
| Max Takeoff Weight | Spraying: 90 kg; spreading: 101 kg (at sea level) |
| Max Diagonal Wheelbase | 2184 mm |
| Dimensions | Unfolded: 2800 x 3150 x 780 mm; arms unfolded/props folded: 1590 x 1930 x 780 mm; folded: 1125 x 750 x 850 mm |
| RTK/GNSS | RTK: GPS L1/L2, GLONASS F1/F2, BeiDou B1/B2, Galileo E1/E5; GNSS: GPS L1, GLONASS F1, Galileo E1, BeiDou B1 |
| Hovering Time | 18 min without payload at 50 kg; 7 min spraying at 90 kg; 6 min spreading at 101 kg (30,000 mAh battery; DJI hovering test conditions) |
| Max Configurable Flight Radius | 2000 m |
| Max Wind Resistance | 6 m/s |
| Spray Tank Volume | 40 L |
| Spreading Tank Volume | 70 L |
| App | DJI Agras |
| Data Source | DJI Agras T40/T20P Flight Manual v1.4 (official) |
| Controller Link | O3 Pro: up to 7 km FCC, 5 km SRRC or 4 km CE/MIC/KCC at 2.5 m aircraft height, unobstructed and interference-free |
| Official Public Specs | https://www.dji.com/t40/specs (checked 2026-10-16) |
Common Failure Modes
Symptoms: Cracked shell, bent arm, loose landing gear, abnormal vibration, or visible crash damage.
Likely areas: outer shell, arms, landing gear, motor mounts
Inspect the airframe before powering on and verify the exact replacement part against the model variant.
Symptoms: Motor start failure, rough spin, propulsion warning, overheating, or unstable hover.
Likely areas: motor, arm wiring, ESC board, power connectors
Check for impact damage, cable strain, and water exposure before replacing boards or motors.
Symptoms: Flow error, pump warning, uneven spray, nozzle blockage, or tank/payload warning.
Likely areas: pump, nozzle, flow sensor, tank, payload wiring
Clean fluid paths and confirm sealing before replacing electronics.
Symptoms: Positioning drift, obstacle sensing warning, compass or IMU calibration prompt, or unstable low-altitude hover.
Likely areas: vision sensors, IMU, GPS/GNSS board, sensor flex cables
Clean sensor windows and verify calibration after shell, sensor, or board replacement.
Repair Notes
Confirm the exact model, variant, error message, and visible damage before selecting parts. Do not substitute parts from a similar model without verification.
Remove the battery before opening the aircraft. Check for moisture, corrosion, and overheated connectors before reconnecting power.
Clean pumps, nozzles, hoses, and flow sensors before assuming an electronic failure.
After replacing gimbal, vision, GNSS, IMU, shell, arm, or propulsion parts, run the required calibration and perform a controlled low-altitude test.
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