DJI Agras T30 OEM Reduction Gearbox Module

The DJI Agras T30 OEM Reduction Gearbox Module is the geared drive unit of the aircraft's granular spreading system. It is a black, cylindrical module built in stepped sections held together by screwed flanges, with a round black guard ring on spokes around its upper end, a long steel output shaft with a threaded tip running out through the centre of that ring, a short stub shaft at the opposite end, and two leads that leave through a black grommet plate: one ending in a small black connector and one, with blue, yellow and red wires, ending in a yellow-sealed connector. A reduction gearbox exists to turn fast, light rotation into slower rotation with more turning force, and this module delivers that slower rotation along its long output shaft to the spreading mechanism. It belongs to the spreading system, not to the spray, power or flight-control systems, and it is identified for the DJI Agras T30 and T10. Operators usually reach it while searching for a T30 spreader gearbox, a T30 spreading motor gearbox, a T10 spreader drive, a bent T30 spreader shaft, or the reason a T30 spreader runs with a wobble, a grind or no output at all. 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 T30 / DJI Agras T10 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Identified for the DJI Agras T30 and T10 granular spreading system
• Matched by gearbox body, guard ring, output shaft length and tip, grommet plate, leads and connectors against the module you removed
• Genuine DJI OEM spreading system component, brand new, complete gearbox module with its leads

The quickest way to confirm the match is two photographs of the module you removed: one side-on, showing the whole length of the output shaft and the guard ring, and one of the two connectors. Send both to us and we will match it for you.

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📦 Package Includes

• 1 × Reduction Gearbox Module — the black cylindrical gearbox body with its screwed flanges, the round guard ring on spokes, the long steel output shaft with threaded tip, the short stub shaft at the opposite end, the black grommet plate and the two leads with their connectors, as shown in the product images

This is one complete gearbox module. It is a single drive unit of the spreading system, not the complete spreading system and not the hopper.

Not included: the hopper, the spreading disc and its housing, the spreading system box cover, the distribution board, the signal cable that connects the spreading system to the aircraft, and any screws used to fasten the module into its mounting.

The guard ring, the output shaft and the two leads are shown as part of the module in the product images. Nothing else is included because it appears near the module on an aircraft.

If the spreading system has damage beyond the gearbox, the DJI Agras T30 OEM Spreading System is the complete assembly. If only the cover over the spreading electronics is cracked, the DJI Agras T30 OEM Spreading System Box Cover is the part. If the gearbox runs true and only the wiring to the aircraft is damaged, the gearbox is not the part you need.

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🔧 Component Overview

A spreading system has to turn an electrical command into steady, forceful rotation that keeps working while granular product presses against it. A motor on its own spins fast with little turning force. A reduction gearbox sits between the drive and the work, slowing the rotation down and multiplying the force, so the mechanism on the end of the shaft keeps turning under load instead of stalling.

The module's features, all visible in the product images:

• The gearbox body — a black cylinder built in stepped sections, the widest section in the middle, joined by flanges with screws around their edges
• The guard ring — a round black ring carried on spokes around the upper end of the body, the largest feature of the module
• The output shaft — a long, bright steel shaft that runs out through the centre of the guard ring and ends in a threaded tip
• The stub shaft — a short shaft with a flat at the opposite end of the body
• The grommet plate — a black rectangular plate where the leads leave the module
• The two leads — one ending in a small black connector, one with blue, yellow and red wires ending in a yellow-sealed connector

The module is not a passive bracket. It is electrically connected, it is geared, and its long shaft reaches out into the working part of the spreader, where it meets grit, product and every knock the spreading system takes.

Over a working season the gearbox module sees:

• Fertiliser dust and seed fragments working along the output shaft towards the body
• Corrosive residue settling on the body, the flanges, the leads and the connectors between jobs
• Load on the gear train when product packs or jams around the mechanism the shaft turns
• Side loads on the long output shaft during fitting, removal and hard landings
• Vibration from the propulsion system for every hour of flight
• Wash-down water around the grommet plate and connectors
• Repeated removal and refitting when the spreading system is taken off and put back

Gearbox modules come off for four reasons: a bent output shaft, a worn or damaged gear train that grinds, slips or will not turn the shaft, a cracked guard ring or body flange, and damage to the leads or connectors.

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⚙️ Functional Purpose

The module's engineering role is reduction. It takes rotation from its drive, slows it through the gear train and delivers it, with more turning force than the drive alone could give, through the long output shaft to the spreading mechanism.

In the spreading system it:

• Receives its electrical connection through its two leads and their connectors
• Reduces the speed of its drive through the gear train inside the body
• Delivers that slower, stronger rotation along the long steel output shaft
• Carries the shaft on its own axis, so the mechanism on the end of it turns true
• Keeps turning against the resistance of granular product in the mechanism

What it does not do matters as much:

• It does not hold product; the hopper does
• It does not decide the rate; the aircraft and the app settings do, and the module carries out the command
• It does not route power or signals for the rest of the spreading system; the distribution board and the signal cable do
• It does not protect the spreading electronics; the spreading system box cover does
• It is not the complete spreading system; the hopper, disc, housing and electronics are separate

That last point is where the long shaft matters. Everything the module does arrives at the work through one long, slender steel shaft. The gear train can be perfect and the module can still be wrong, if the shaft that carries its output no longer runs straight.

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🔍 Diagnosis — a bent output shaft still turns, and that is exactly why it gets missed

When a spreader starts to wobble, grind or wear out the parts on the end of its shaft, the instinct is to listen for a failed gear or a failing drive. Those faults happen. But the commonest damage to a module with a long, slender output shaft is simpler and quieter: the shaft has been bent. A knock during fitting, a heavy landing with the spreading system on, or a jam that stopped the mechanism while the drive kept pushing, and the shaft is no longer on its own axis.

A bent shaft does not stop the spreader. That is the trap. The module still powers up, the gears still turn, the shaft still rotates and the mechanism on the end of it still moves. Nothing reports a fault. What changes is that the far end of the shaft now traces a small circle instead of spinning on a point. Every turn pushes sideways where the shaft leaves the gearbox and rocks whatever is fitted to the tip. The spreader runs, and it runs rough.

The longer the shaft, the more a small bend near the body shows at the tip. That makes the tip the instrument: watch it, not the body.

Signs the reduction gearbox module has failed:

• The threaded tip of the output shaft visibly wobbles or traces a circle when the shaft turns
• Vibration or a rhythmic knock from the spreader that rises and falls with the shaft speed
• Grinding, clicking or a rough feel from inside the gearbox when the shaft is turned
• The drive is heard running but the output shaft does not turn, or slips under load
• Play in the output shaft when it is rocked side to side at the tip
• Uneven wear, scoring or rubbing marks on the parts mounted on or around the shaft
• A cracked guard ring, a broken spoke or a cracked body flange
• Damaged leads at the grommet plate, or a corroded, cracked or loose connector

Before condemning the gearbox, rule out what imitates it:

• Packed or caked product — material jammed around the mechanism makes a healthy gearbox labour, click or stall
• The part on the end of the shaft — a loose, cracked or out-of-balance part fitted to the tip makes a straight shaft look as if it wobbles
• The mounting — loose fixing screws let the whole module rock in its seat, which feels like shaft play
• The hopper — a bridged or blocked hopper starves the spreader whatever the gearbox does
• Settings and calibration — a product or settings change alters delivery with every part healthy
• The signal cable and connectors — a module that is not receiving its command looks dead without being dead

Use the shaft tip as your instrument. With the aircraft powered down and the battery out, empty and remove the hopper, wash out the spreader and remove whatever is fitted to the tip of the output shaft. Turn the shaft slowly by hand while you watch the threaded tip against a fixed edge, a ruler held close or a straight line on the frame behind it. A straight shaft turns on a point. A bent one swings its tip around a small circle, and the gap to your reference edge opens and closes once per turn. Then hold the tip and rock it gently side to side: any knock or clearance is play at the gearbox end.

Do that check first. It needs a clean spreader, the tip uncovered and a few minutes, and it separates a bent shaft from a gear fault, a loose mount and a damaged part on the tip.

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⚠️ Common Replacement Indicators

Replace the reduction gearbox module when inspection confirms one of these:

• The output shaft tip runs out of true when turned by hand with nothing fitted to it
• Play at the gearbox end when the shaft tip is rocked side to side
• Grinding, clicking or roughness inside the gearbox with the mechanism clear of product
• The drive runs but the output shaft does not turn or slips under load
• A cracked guard ring, broken spoke or cracked body flange
• Damaged leads at the grommet plate or corroded connector pins
• Corrosion or chalky deposits where the output shaft enters the body
• Previous repairs with adhesive or tape on the body, the guard ring or the leads

Inspect these first, because they produce similar symptoms:

• Product packed or caked around the mechanism
• The part fitted to the tip of the output shaft
• The module's fixing screws and mounting
• The hopper and its outlet
• Spreading settings and calibration for the product in use
• The signal cable and connectors

There is no published service interval for the reduction gearbox module. It is replaced when its shaft is bent, its gear train fails or its body is damaged, not on a schedule.

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📐 Specifications

Product name: DJI Agras T30 OEM Reduction Gearbox Module

DJI family: Agras

Primary aircraft: DJI Agras T30

Compatible models: DJI Agras T30, DJI Agras T10

Fitment basis: Identified for the DJI Agras T30 and T10

Aircraft system: Spreading system — granular spreading

Component type: Reduction gearbox module with output shaft, guard ring and leads

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

Quantity: 1 complete module

Form: Black stepped cylindrical body with screwed flanges, a round guard ring on spokes, a long steel output shaft with threaded tip, a short stub shaft at the opposite end and a grommet plate for the leads

Output shaft: Long bright steel shaft with a threaded tip, running through the centre of the guard ring

Leads: Two leads leaving through a black grommet plate: one to a small black connector, one with blue, yellow and red wires to a yellow-sealed connector

Reduction ratio: Not published for this part

Output speed and torque: Not published for this part

Material: Not published for this part

Colour: Black body, guard ring and grommet plate; bright steel output shaft; black and yellow-sealed connectors

Dimensions: Not published for this part

Shaft length: Not published for this part

Weight: Not published for this part

Electrical: Electrically connected gearbox module; voltage and current not published for this part

Mounting position: In the spreading system, with the output shaft reaching into the spreading mechanism

Installation method: Fastens into its existing mounting; the output shaft takes the part fitted to its tip; both leads plug into the existing wiring

Hardware included: None — mounting screws are not supplied

Not included: Hopper, spreading disc and housing, spreading system box cover, distribution board, signal cable

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 spreading system so you are not working in fertiliser residue, and wear gloves
• Photograph the old module in place from the side, with the whole output shaft, the guard ring and the lead route in frame
• Note how the part on the tip of the output shaft is fitted, and in which orientation
• Lay the new module beside the old one and compare the body, guard ring, shaft length, threaded tip and both connectors

During installation

• Remove the part fitted to the tip of the output shaft, supporting the shaft so it is not levered sideways
• Unplug both connectors, pressing any latch or releasing the yellow seal rather than pulling on the wires
• Remove the module's fixing screws and lift the module out along the line of the shaft, without bending it against the frame
• Clean product and residue out of the mounting position
• Fit the new module in the same orientation, feeding the output shaft through straight; never use the shaft as a handle or a lever
• Refit the fixing screws finger-tight first, then tighten evenly; no torque figure is published, so tighten snugly without cracking the flanges
• Route both leads along their original path, clear of moving parts, and plug each connector in until it seats fully and its seal sits square
• Refit the part on the tip of the shaft as it was

After installation

• With the tip uncovered or the fitted part spun by hand, check that the shaft turns freely and true before power is applied
• Refit the battery and keep hands clear of the spreading mechanism
• Run the spreading system empty and listen for grinding, clicking or a rhythmic knock
• Refit the hopper and check that it seats fully
• Spread a short test strip with your usual product and check that delivery is steady
• Record the replacement in the maintenance log

Maintenance between jobs. Wash fertiliser dust and residue off the module, the output shaft and the mechanism at the end of each day, and dry the connectors and the grommet plate. Handle the spreading system by its frame, never by the output shaft. A shaft that is never used as a handle stays straight.

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🚜 Necessary For

This gearbox module is for operators and technicians whose spreader has started to wobble, grind or lose drive:

• DJI Agras T30 operators running the granular spreading system for fertiliser, seed or pellets
• DJI Agras T10 operators with a spreading system that runs rough or will not turn
• Commercial spreading and seeding applicators whose spreader picked up a vibration after a hard landing
• Agras service centres replacing a gearbox with a bent shaft or a failed gear train
• Fleet managers keeping a spare gearbox module for the busy spreading weeks

This is not the part you need if:

• The shaft turns true and freely by hand and the vibration came from the part on its tip — replace that part instead
• The module rocks in its seat because its fixing screws are loose — tighten the mounting and test again
• The spreader labours only when product is packed around the mechanism — clean it and test again
• Delivery changed after a product or settings change with every part healthy — recalibrate first
• The spreading system has damage well beyond the gearbox — the DJI Agras T30 OEM Spreading System is the complete assembly
• Only the cover over the spreading electronics is cracked — the DJI Agras T30 OEM Spreading System Box Cover is the part
• You fly a T16, T20, T40, T50 or T20P — this module is identified for the T30 and T10

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💡 Why This Part Matters

A long output shaft is a lever. A small bend close to the gearbox becomes a visible circle at the tip, and every turn of that circle pushes sideways where the shaft leaves the body and rocks whatever is fitted to the end. The shaft still turns, so the spreader still works. It simply wears itself out while it does.

That is the whole case for this module. A gearbox with a bent shaft is not a part that might fail later; it has already failed, because it no longer holds its output on its own axis. Straightening a steel shaft by hand does not restore that, and a part that still turns is not the same as a part that is still right.

It is also the case against replacing the module too early. A loose part on the tip, loose mounting screws or packed product can all look and sound like a gearbox fault. Remove the part on the tip, spin the shaft by hand and watch it against a straight edge. If it turns on a point and rocks with no play, the gearbox is fine.

When the tip swings a circle, the shaft has play at the body, or the gear train grinds with the mechanism clean, nothing else on the spreader will fix it. The module is the part that turns drive into steady, true rotation, and it is the part that puts the spreader back on its axis.

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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 T30 OEM Reduction Gearbox Module

Brand: DJI

DJI family: Agras

Primary aircraft: DJI Agras T30

Compatible models: DJI Agras T30, DJI Agras T10

Fitment basis: Identified for the DJI Agras T30 and T10

Component: Reduction gearbox module with output shaft, guard ring and leads

Aircraft system: Spreading system — granular spreading

Installed position: In the spreading system, output shaft reaching into the spreading mechanism

Primary function: Reduces drive speed and delivers slower, stronger rotation through a long steel output shaft

Form: Black stepped cylindrical body, round guard ring on spokes, long steel output shaft with threaded tip, stub shaft, grommet plate, two leads

Connectors: One small black connector; one yellow-sealed connector on a blue, yellow and red lead

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

Quantity supplied: 1 complete module

Not included: Hopper, spreading disc and housing, spreading system box cover, distribution board, signal cable, mounting screws

Key diagnostic: Remove the part on the shaft tip and turn the shaft by hand; a tip that traces a circle means a bent shaft

Common failure modes: Bent output shaft, worn or damaged gear train, play at the gearbox end, cracked guard ring or flange, damaged leads or connectors

Service interval: None published

Condition: Brand new

Part classification: DJI OEM spreading system component

Also searched as: T30 spreader gearbox; T30 spreading motor gearbox; T10 spreader gearbox; DJI T30 reduction gearbox; T30 spreader drive; bent T30 spreader shaft

Disambiguation: Not the complete spreading system; not the spreading system box cover; not the distribution board; not a spray-system part; not identified for the T16, T20 or T40

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 T30 reduction gearbox module? It is the geared drive unit of the T30 granular spreading system. It slows its drive down, multiplies the turning force and delivers that rotation through a long steel output shaft to the spreading mechanism.

Which aircraft does it fit? It is identified for the DJI Agras T30 and T10.

Does it fit the T20, T16 or T40? It is identified only for the T30 and T10. Send us a photograph of the module you removed and we will check it against what you have.

My spreader still works but vibrates. Could it be this gearbox? Yes. A bent output shaft still turns, so the spreader still works, but the tip traces a circle and shakes everything on it. Remove the part on the tip and spin the shaft by hand against a straight edge.

How do I tell whether the shaft is bent? Turn it slowly by hand with nothing fitted to the tip and watch the threaded end against a fixed edge. A straight shaft turns on a point. A bent one swings its tip around a small circle.

Can I straighten a bent output shaft? Straightening a steel shaft by hand does not put it back on its own axis, and the gearbox end has already taken the side load. A bent shaft is replaced with the module.

Is the guard ring included? Yes. The round guard ring on its spokes is shown as part of the module in the product images.

Are the leads and connectors included? Yes. Both leads are shown leaving through the grommet plate, one to a small black connector and one to a yellow-sealed connector.

Is this the complete spreading system? No. It is the gearbox module only. The DJI Agras T30 OEM Spreading System is the complete assembly.

The drive runs but the shaft does not turn. Is it the gearbox? Clear any packed product from the mechanism first. If the drive still runs while the shaft stays still or slips under load, the gear train inside the module has failed.

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 module side-on and at the connectors and send it to us if you want that confirmed.

What is the reduction ratio or output torque? Neither is published for this part.

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

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

How do I keep the new shaft straight? Never lift or lever the module or the spreading system by the output shaft, feed the shaft in straight when fitting, and wash residue off it after each day of work.

Is there a service interval? No. Replace it when the shaft is bent, the gear train fails or the body is damaged.