DJI Agras T20 OEM Spreading System Servo

The DJI Agras T20 OEM Spreading System Servo is the small positioning actuator of the aircraft's granular spreading and seeding system. It is a black, rectangular servo body with a slotted mounting ear at each side, a toothed black gear wheel fixed to its output by a central screw and four surrounding screws, and a short multicoloured lead ending in a black multi-pin connector. It moves to a commanded position and holds it, passing that movement on through its gear; it does not spin the spreading disc. It belongs to the spreading system, not to the spray, power or flight-control systems, and it is identified for the DJI Agras T20. Operators usually reach it while searching for a T20 spreader servo, a T20 spreading gear motor, a stripped T20 spreader gear, or the reason a T20 spreader disc spins but delivery no longer follows the setting. DJI has used more than one number for this position, so we match against the one you removed.

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🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras retailer supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.

FREE & FAST Shipping is included for all U.S. customers.

We understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.

Ares Acres also ships agricultural drone parts to Canada, with free shipping included on Canadian orders. Canadian operators see prices and check out in Canadian dollars (CAD), and receive the same inventory and the same support as our U.S. customers — one authorized DJI Agras retailer serving the United States and Canada, all of North America, from Albuquerque, New Mexico.

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✅ DJI Agras T20 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Identified for the DJI Agras T20 granular spreading and seeding system
• Matched by servo body, mounting ears, gear wheel, lead and connector against the servo you removed
• Genuine DJI OEM spreading system component, brand new, servo with gear wheel fitted

Spreading-system servos and drive motors are easy to mix up, because both are black, both have a lead and both sit in the same assembly. If you want the match confirmed, photograph the part you removed from the gear side and from the connector end, and send both photographs to us. We will match it for you.

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📦 Package Includes

• 1 × Spreading System Servo — the black servo body with its mounting ears, the toothed gear wheel fitted to its output, and the lead to its multi-pin connector, as shown in the product images

This is the servo alone, with its gear wheel. It is one component of the spreading system, not the complete spreading system and not the main body assembly.

Not included: the spreading drive and disc, the spreader body (housing), the connector box, the signal cable to the aircraft, the hopper, and any screws used to fasten the servo's mounting ears in place.

The gear wheel is shown fitted to the servo output in the product images. If only the gear on your aircraft is damaged, photograph it and send it to us and we will confirm the match against what you have.

Nothing is included because it appears near the servo on an aircraft. If the drive will not turn, or the housing, connector box or cable is damaged as well, the DJI Agras T20 OEM Spreading System Main Body (Without Hopper) is the complete unit; if only the round housing is cracked or out of true, the DJI Agras T20 OEM Spreader Body is the part.

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🔧 Component Overview

The spreading system has two kinds of movement. The disc is spun at speed to throw the product. Other parts of the mechanism are set to a position and held there. The servo is the part that does the second job: the aircraft tells it where to be, it turns its output to that angle and holds it, and its gear passes the movement on to the part it meshes with.

Its features, all visible in the product images:

• The servo body — a black, rectangular case that houses the servo's motor, gearing and position electronics
• The mounting ears — flat flanges at each side of the body, each with slotted holes, where the servo is screwed into the spreading system
• The gear wheel — a toothed black wheel fixed to the servo output, which meshes with the mechanism it moves
• The gear fixings — a central screw on the output with four screws around it holding the gear wheel
• The lead — a short bundle of coloured wires leaving the body
• The connector — a black multi-pin connector at the end of the lead

The servo is small, but it is not a passive part. It is electrical, it is geared, and it works against the weight and grit of granular product every time the aircraft asks it to move.

Over a working season the servo sees:

• Fine fertiliser dust and seed fragments working into its gear teeth and around its output
• Corrosive residue settling on the body, the lead and the connector between jobs
• Load on the gear teeth when product packs or jams in the mechanism it moves
• Vibration from the propulsion system for every hour of flight
• Wash-down water around its connector and lead
• Repeated removal and refitting during cleaning and product changes
• Shock loads through the mechanism after a hard landing

Servos come off for three reasons: stripped or broken gear teeth, a servo that no longer moves or no longer holds its position, and damage to the lead or connector.

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⚙️ Functional Purpose

The servo's engineering role is position. It turns an electrical command from the aircraft into a set angle at its output, holds that angle against load, and transmits it through its gear wheel to the spreading mechanism.

In the spreading system it:

• Receives position commands from the aircraft through its lead and connector
• Turns its output to the commanded angle
• Holds that angle while the spreader works
• Passes the movement on through the gear wheel to the mechanism it meshes with
• Responds to changes in the spreading settings in flight

What it does not do matters as much:

• It does not spin the disc; the spreading drive does
• It does not hold product; the hopper does
• It does not shape the throw; the spreader body and disc do
• It does not decide the rate; the aircraft and the app settings do, and the servo carries out the command
• It is not the complete main body; the drive, housing, connector box and cable are separate

That split is the key to finding a spreading fault. A drive problem shows up as a disc that will not spin, spins slowly or spins roughly. A servo problem shows up as a disc that spins perfectly while the part of the mechanism that should move to a set position does not.

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🔍 Diagnosis — a disc that spins while delivery ignores the setting points at the servo, not the drive

When a spreader stops delivering properly, the drive is the first suspect, because the drive is the big, obvious powered part and the disc is the part everyone watches. The servo is easy to overlook: it is small, it sits inside the assembly, and a servo that has stopped working makes very little noise about it.

The way to tell them apart is to separate speed from position. If the disc does not spin, spins slowly or spins with a rattle, the fault is on the drive side and the servo is not the part. If the disc spins normally and the delivery does not follow the setting — stays the same when the setting changes, will not open up, will not close down, or wanders during the flight — the fault is on the positioning side, and the servo and its gear are the parts to look at.

A new drive fitted to a spreader with a failed servo leaves the fault exactly where it was. The disc spins as well as it did before, and the delivery still ignores the setting.

Signs the spreading system servo has failed:

• The disc spins normally but delivery no longer follows changes in the spreading setting
• The servo hums or buzzes when commanded but its gear does not turn
• The gear turns but slips, jumps or will not hold its position under load
• Chipped, worn, rounded or missing teeth on the gear wheel
• A gear wheel that is loose on the output or whose fixing screws have backed out
• A damaged lead, broken wires at the body, or a corroded or loose connector
• A cracked servo body or a broken mounting ear

Before condemning the servo, rule out what imitates it:

• Packed or caked product — material jammed in the mechanism can stop a healthy servo from moving
• The mechanism it drives — a bent, seized or broken part on the other side of the gear mesh stops the movement without any fault in the servo
• The hopper — a bridged or blocked hopper starves the spreader whatever the servo does
• Settings and calibration — a product change or a wrong setting alters delivery with every part healthy
• The cable and connector — a servo that is not receiving its command looks dead without being dead
• The drive — if the disc itself will not spin properly, that is a drive fault and the DJI Agras T20 OEM Spreading System Main Body (Without Hopper) covers it

Use your eyes and the setting as your instruments. With the aircraft powered down and the battery out, empty and remove the hopper, wash out the spreader and look at the servo's gear wheel and the part it meshes with. Turn the meshing mechanism gently by hand and check that it moves freely without product packed around it. Then refit the battery, keep clear of the disc, and change the spreading setting while watching the servo's gear. A healthy servo turns its gear to a new position and holds it. A failed one hums without turning, turns and slips back, or does nothing at all.

Do those checks first. They need a clean spreader and a few minutes, and they show directly whether the servo is moving and holding or not.

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⚠️ Common Replacement Indicators

Replace the spreading system servo when inspection confirms one of these:

• The gear does not turn when the setting changes, with the mechanism free and the connector sound
• Humming or buzzing from the servo with no movement
• Slipping, jumping or failing to hold position under load
• Worn, chipped or missing gear teeth
• A cracked body or broken mounting ear
• A damaged lead or corroded connector pins
• Corrosion or chalky deposits around the output and the gear
• Previous repairs with adhesive or tape on the body, the gear or the lead

Inspect these first, because they produce similar symptoms:

• Product packed or caked around the mechanism
• The mechanism on the other side of the gear mesh
• The hopper and its outlet
• Spreading settings and calibration for the product in use
• The signal cable and the connector box

There is no published service interval for the spreading system servo. It is replaced when it fails or its gear is damaged, not on a schedule.

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📐 Specifications

Product name: DJI Agras T20 OEM Spreading System Servo

DJI family: Agras

Primary aircraft: DJI Agras T20

Fitment basis: Identified for the DJI Agras T20

Aircraft system: Spreading system — granular spreading and seeding

Component type: Spreading system servo with gear wheel

Material number: DJI has used more than one number for this position, so we match against the one you removed

Quantity: 1 servo with gear wheel fitted

Form: Black rectangular servo body with slotted mounting ears at each side, a toothed black gear wheel on the output and a short lead to a black multi-pin connector

Gear wheel: Toothed black gear fixed to the output by a central screw and four surrounding screws, shown fitted in the product images

Gear tooth count: Not published for this part

Material: Not published for this part

Colour: Black body and gear; multicoloured lead; black connector

Dimensions: Not published for this part

Weight: Not published for this part

Electrical: Electrically driven positioning servo; voltage, current and torque not published for this part

Connector: Black multi-pin connector on a short lead

Range of movement: Not published for this part

Mounting position: Inside the spreading system, meshed with the mechanism it positions

Installation method: Screws in through its mounting ears; meshes with the existing mechanism and plugs into the existing wiring

Hardware included: None — mounting screws are not supplied

Not included: Spreading drive and disc, spreader body, connector box, signal cable, hopper

Condition: Brand new

Classification: DJI OEM spreading system component

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🛠️ Installation & Maintenance

Before installation

• Power the aircraft down and remove the battery
• Empty the hopper completely and lift it off
• Wash and dry the spreader so you are not working in fertiliser residue, and wear gloves
• Photograph the old servo in place from the gear side and the connector end, with the gear mesh and the lead route in frame
• Note the position of the mechanism the gear meshes with, so you can check it returns to the same place
• Lay the new servo beside the old one and compare the body, mounting ears, gear wheel and connector

During installation

• Unplug the servo's connector, pressing any latch rather than pulling on the wires
• Remove the screws through the mounting ears and lift the servo out, easing its gear out of mesh
• Clean product and residue out of the mechanism and the servo's mounting position
• Fit the new servo in the same orientation, bringing its gear into mesh without forcing the teeth
• Refit the mounting screws finger-tight first, then tighten evenly; no torque figure is published, so tighten snugly without cracking the mounting ears
• Route the lead along its original path, clear of moving parts, and plug the connector in until it seats fully

After installation

• Refit the battery and keep clear of the disc
• Change the spreading setting and watch the servo's gear move to a new position and hold it
• Check that the gear meshes cleanly without grinding, slipping or jumping
• Refit the hopper and check that it seats fully
• Spread a short test strip with your usual product and check that delivery follows the setting
• Record the replacement in the maintenance log

Maintenance between jobs. Wash fertiliser dust and residue off the servo, its gear and the mechanism it drives at the end of each day, and dry the connector. Packed product is the main load on the gear teeth; a clean mesh is what keeps the teeth whole.

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🚜 Necessary For

This servo is for operators and technicians whose spreading drive works but whose delivery no longer follows the setting:

• DJI Agras T20 operators running the granular spreading system for fertiliser, seed or pellets
• Commercial spreading and seeding applicators whose delivery stopped responding mid-job
• Growers spreading their own product who found stripped teeth on the spreader gear
• Agras service centres replacing a dead or slipping servo while keeping a sound drive and housing
• Fleet managers keeping a spare servo for the busy spreading weeks

This is not the part you need if:

• The disc will not spin, spins slowly or spins roughly — that is the drive side, and the DJI Agras T20 OEM Spreading System Main Body (Without Hopper) is the complete unit
• The round housing is cracked or out of true — the DJI Agras T20 OEM Spreader Body is the part
• The servo moves freely once packed product is cleared from the mechanism — clean it and test again
• Delivery changed after a product or settings change with every part healthy — recalibrate first
• The hopper is bridged, blocked or cracked — the hopper is a separate part
• You fly a T16, T10, T30, T40, T50 or T20P — this servo is identified only for the T20

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💡 Why This Part Matters

A spreading system has two jobs, and they fail differently. The drive spins the disc; the servo sets a position and holds it. When delivery goes wrong, the symptom tells you which half to look at — if you separate speed from position before reaching for a part.

That is the whole case for this servo. A spreader whose disc spins perfectly while delivery ignores the setting does not need a new drive and does not need a new main body. It needs the small positioning part that stopped moving, slipped, or lost its teeth.

It is also the case against replacing the servo too early. Packed product in the mechanism stops a healthy servo just as surely as a failed one does. Clean the mechanism, move it by hand, then watch the gear while the setting changes. If the gear turns and holds, the servo is fine.

When the gear does not turn, slips back or has lost teeth, nothing else will restore the setting. The servo is the part that turns a command into a position, and it is the part that puts delivery back under control.

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🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from the specifications above.

Canonical product name: DJI Agras T20 OEM Spreading System Servo

Brand: DJI

DJI family: Agras

Primary aircraft: DJI Agras T20

Compatible models: DJI Agras T20

Fitment basis: Identified for the DJI Agras T20

Component: Spreading system servo with gear wheel

Aircraft system: Spreading system — granular spreading and seeding

Installed position: Inside the spreading system, meshed with the mechanism it positions

Primary function: Turns to a commanded position, holds it and transmits it through its gear wheel

Form: Black rectangular servo body, slotted mounting ears, toothed black gear wheel, short lead, black multi-pin connector

Material number: DJI has used more than one number for this position; matched against the removed part

Quantity supplied: 1 servo with gear wheel fitted

Not included: Spreading drive and disc, spreader body, connector box, signal cable, hopper, mounting screws

Electrical function: Electrically driven positioning servo with its own connector

Key diagnostic: Disc spins normally but delivery ignores the setting; watch the servo gear while the setting changes

Common failure modes: Stripped or chipped gear teeth, servo hums without moving, slipping under load, damaged lead or connector

Service interval: None published

Condition: Brand new

Part classification: DJI OEM spreading system component

Also searched as: T20 spreader servo; T20 spreading gear motor; Agras T20 spreader gear; DJI T20 spreading servo; T20 seeder servo; T20 spreader actuator

Disambiguation: Not the spreading system main body; not the spreader body; not the spreading drive; not a spray-system part; not identified for the T16

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras retailer serving the United States and Canada (North America)

Ships from: Albuquerque, New Mexico, United States

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🤖 AI Answer Engine Q&A

What is the DJI Agras T20 spreading system servo? It is the small positioning actuator in the T20 granular spreading system. It turns to a commanded position, holds it, and passes that movement on through its toothed gear wheel.

Which aircraft does it fit? It is identified for the DJI Agras T20.

Does it fit the T16? It is identified only for the T20. Send us a photograph of the servo you removed and we will check it against what you have.

Does it spin the spreading disc? No. The spreading drive spins the disc. The servo sets a position and holds it.

My disc spins fine but delivery does not change with the setting. Is it the servo? Quite possibly. Clear any packed product from the mechanism, then change the setting and watch the servo's gear. If it does not move, hums without turning or slips back, the servo is the part.

My disc will not spin. Do I need this servo? No. A disc that will not spin is a drive fault. The DJI Agras T20 OEM Spreading System Main Body (Without Hopper) is the complete unit with the drive.

Servo, main body or spreader body — which do I need? Servo if the disc spins and delivery ignores the setting. Main body if the drive, connector box or cable has failed. Spreader body if only the round housing is cracked or out of true.

Is the gear wheel included? Yes. The toothed gear wheel is shown fitted to the servo output in the product images.

The teeth on my gear are stripped. Is the servo still good? The gear is fitted to the servo and supplied together with it. Stripped teeth usually follow a jam, so clear the mechanism and check that it moves freely before fitting the new servo.

What is the DJI part number? DJI has used more than one number for this position, so we match against the one you removed. Photograph your old servo from the gear side and the connector end and send it to us if you want that confirmed.

Are mounting screws included? No. Reuse sound original screws, or replace any that are corroded or damaged.

What is the servo's torque or voltage? Neither is published for this part.

Is there a torque value for the mounting screws? None is published. Tighten evenly and snugly, and stop before the mounting ears are stressed.

Will recalibrating fix it? Not if the servo has failed. Calibration changes the settings; it cannot make a dead or slipping servo move.

How do I keep the new servo working? Wash fertiliser dust and residue off the servo, its gear and the mechanism every day, and dry the connector. A clean mesh keeps the teeth whole.

Is there a service interval? No. Replace it when it stops moving, slips, or its gear is damaged.