DJI Agras T40 OEM Centrifugal Spray Rod Kit

The DJI Agras T40 OEM Centrifugal Spray Rod Kit is the complete four-piece spray rod set for a centrifugal sprinkler position on the spraying system: the centrifugal spray rod itself, the spray rod adaptive shaft, the spray rod fixing nut and the spray rod quick-release sleeve. It is identified for the DJI Agras T40 and T20P. The rod is the cranked arm that carries the centrifugal sprinkler out from the airframe and sets where it sits; the three smaller pieces are the joint hardware that completes the rod's connection and lets it be secured and released. The kit exists for the repair where the arm and its joint were damaged together, or where the joint pieces have worn to the point that a new arm alone would go back onto tired hardware. Operators search for it as a T40 spray rod kit, T40 sprinkler arm kit, T20P spray rod set, T40 spray rod quick-release sleeve, or Agras centrifugal spray rod with nut and shaft.

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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 T40 / DJI Agras T20P Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Identified for the DJI Agras T40 and T20P
• Matched piece by piece against the rod, shaft, nut and sleeve you removed
• Genuine DJI OEM spray-system kit, brand new, four pieces

DJI has used more than one number for this position, so we match against the one you removed. Photograph the old rod in place on the aircraft, then lay the rod, shaft, nut and sleeve out on the bench and photograph them together, and send us those photographs if you want the match confirmed.

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📦 Package Includes

• 1 × centrifugal spray rod — the cranked black moulded arm, with a rectangular socket end and a round foot
• 1 × spray rod adaptive shaft — the black slotted adapter with a ribbed collar
• 1 × spray rod fixing nut — the smaller knurled black nut
• 1 × spray rod quick-release sleeve — the larger knurled black sleeve

Four pieces, one sprinkler position, per variant. This is a kit, not an assembly: the pieces arrive separately and are fitted together on the aircraft. An aircraft that carries two centrifugal sprinklers carries two spray rods; if both positions were damaged, two kits are needed.

Not included: the centrifugal sprinkler, the centrifugal motor, the spinner disks, the solenoid valve, hoses and hose fittings, the sprinkler cable, clamps, clips, or mounting screws. Those are separate parts. Nothing is included because it appears near the kit in a product image.

Reuse the original fixing screws only if they are straight, clean and undamaged. A screw that sat in a rod which bent or cracked took the same load, and it deserves a close look before it goes back in.

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🔧 Component Overview

A centrifugal sprinkler throws liquid off the edge of spinning disks, so where it sits and how it is angled decide where the spray lands. On the T40 and T20P the spray rod is the part that carries the sprinkler out from the airframe and holds it there. The kit is that rod plus the three pieces that complete its joint.

Each piece is recognisable on the bench:

• The centrifugal spray rod is a cranked, moulded black arm. One end is a rectangular socket with a small rectangular window in its wall; the other end is a broad, round foot with slots in its side. The long section between them is a flat-sided beam.
• The spray rod adaptive shaft is a black slotted adapter. One end carries a crown of slotted fingers, the middle carries a flange with ribs below it, and the other end is a plain round spigot.
• The spray rod fixing nut is the smaller of the two knurled pieces, with fine vertical knurling around its outside.
• The spray rod quick-release sleeve is the larger knurled piece, with broader ribs; it is the piece designed to be gripped by hand.

As the part designations say, the adaptive shaft adapts the rod's joint, the fixing nut secures it, and the quick-release sleeve lets the connection be released and refitted without tools. Exactly how the three pieces stack on your aircraft is easiest to confirm from a photograph of the old set taken before it comes apart.

The rod is one of the most exposed parts of the spraying system. It sits low on the aircraft, takes the leverage of the sprinkler's weight on a hard landing, meets crop canopy on low passes, gets caught in transport, and lives in chemical mist and wash water. The joint pieces share all of that, and add their own wear: a sleeve and a nut are threaded and gripped every time the sprinkler comes off for cleaning.

Typical reasons for replacing the whole kit are an impact that cracked or bent the rod and also split or distorted the nut or sleeve, a joint that no longer locks firmly after many cleaning cycles, chemical residue that has seized or swollen the threaded pieces, or a crash repair where the old joint hardware went missing.

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⚙️ Functional Purpose

The kit's engineering role is to hold a centrifugal sprinkler at a fixed position and attitude relative to the airframe, and to do it through a joint that can be taken apart for service and put back together the same way every time.

The two jobs are split between the pieces:

• Position and angle — the rod carries the sprinkler out from the airframe and sets the line along which it sprays
• Matching the other side — a correct rod puts its sprinkler where the sprinkler on the opposite side mirrors it
• A secure joint — the adaptive shaft and fixing nut hold the rod's connection tight against vibration and downwash
• A serviceable joint — the quick-release sleeve lets the connection be undone for cleaning or replacement and refitted by hand
• Load path — the rod and its joint carry the sprinkler's weight and vibration into the airframe

None of the four pieces generates the spray, meters the liquid or controls the sprinkler. Those jobs belong to the pump, the flow meter, the solenoid valve and the centrifugal motor. The kit controls where the sprinkler is and whether it stays there.

That is why problems with it show up as coverage and vibration problems rather than as errors on the remote controller. The aircraft cannot tell that a sprinkler has dropped a few degrees, or that a joint has started to move. The motor spins, the valve opens, and the spray still lands somewhere it should not.

What the kit does not do matters too:

• It does not fix a motor that grinds, stalls or will not start
• It does not fix cracked, warped or residue-caked spinner disks
• It does not fix low or no flow, which belongs to the pump, hoses, filters and solenoid valve
• It does not fix a damaged sprinkler cable or connector
• It does not straighten a bent airframe arm or landing gear mount that the rod is fixed to

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🔍 Diagnosis — decide whether the arm failed, the joint failed, or both

A spray rod position can fail in two different places, and they call for different parts. The arm can be bent or cracked, which moves the sprinkler. The joint can be worn, loose or damaged, which lets the sprinkler move. Working out which one failed is the whole diagnosis, because it decides whether the rod alone, the joint pieces alone, or this complete kit is the repair.

Arm faults — the rod itself has moved the sprinkler:

• The sprinkler sits lower, further out, further in, or tilted compared with the sprinkler on the other side
• The rod shows a bend when you sight along its length
• There is a crack in the beam, at the bend, at the socket end or around the round foot
• Coverage is heavier on one side of the swath, or there is a stripe at one edge, with flow that checks out

Joint faults — the connection lets the sprinkler move:

• The sprinkler can be rocked or turned by hand at the joint, while the rod itself is straight
• The fixing nut will not tighten firmly, spins without drawing up, or will not start on its thread
• The quick-release sleeve will not lock, slips under hand pressure, or is cracked or split
• The adaptive shaft's slotted fingers are broken, splayed or chewed
• One sprinkler vibrates or chatters more than its partner, and the vibration changes when you press on the joint
• Residue has seized the nut or sleeve so the joint cannot be undone for cleaning without force

How to tell them apart in a few minutes:

• Compare both sides first. With the aircraft level, look from behind and from the side. Sprinklers that do not mirror each other point at the arm or its airframe mount.
• Measure. Pick a fixed airframe point that exists on both sides and measure to the same point on each sprinkler. A clear difference is a geometry fault.
• Hold the rod and move the sprinkler. If the sprinkler moves while the rod does not, the fault is in the joint. If the rod moves at the airframe, look at its mount.
• Take the joint apart and look. Clean off residue, then check the nut and sleeve for cracks, flattened knurling and damaged threads, and the shaft's fingers for breaks.
• Check the airframe mount. If the arm or mount the rod is fixed to is bent, a new rod will sit in the same wrong place.

What each result means for the repair:

• Arm damaged, joint pieces in good condition — the centrifugal spray rod on its own is the repair
• Joint loose or damaged, arm straight and uncracked — the fixing nut and adapter shaft pair, or the individual joint piece that failed, is the repair
• Arm damaged and joint damaged, or joint pieces worn after long service — this kit is the repair, because it replaces all four pieces in one go
• Arm and joint sound, sprinkler still sprays badly — the fault is in the disks, the motor or the flow path, and none of these parts will fix it

Clear the arm-or-joint question first, while that information is still cheap. It is the difference between fitting the right pieces and fitting a new arm onto a joint that will let it move.

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⚠️ Common Replacement Indicators

Replace the kit when inspection confirms one of these:

• A bent or cracked rod together with a cracked, split or distorted nut or sleeve
• A rod damaged in a hard landing, rollover or canopy strike where the joint pieces also took the impact
• A joint that no longer locks firmly after long service, with flattened knurling or worn threads
• A fixing nut or quick-release sleeve that has seized with residue and had to be forced off
• Broken or splayed fingers on the adaptive shaft along with any damage to the rod
• Joint pieces lost or mixed up during a crash repair or a cleaning session
• A rod that has been bent and straightened by hand, where the joint pieces are also suspect
• A sprinkler that sits out of line and also moves at the joint when pushed

Inspect these first, because they produce similar symptoms:

• Spinner disks — cracks, chips, warping, caked residue
• Centrifugal motor — rough rotation, shaft play, stalling
• Solenoid valve and the hose to that sprinkler
• Pump, filters and flow meter if both sides are affected
• The airframe arm or landing gear mount the rod is fixed to
• Spray settings and flight height on the remote controller

There is no published service interval for the rod or its joint pieces. They are replaced when they are damaged, worn or out of line, not on a schedule.

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📐 Specifications

Product name: DJI Agras T40 OEM Centrifugal Spray Rod Kit

DJI family: Agras

Primary aircraft: DJI Agras T40

Also identified for: DJI Agras T20P

Fitment basis: Identified for the DJI Agras T40 and T20P

Aircraft system: Spraying — centrifugal sprinkler mounting

Component type: Kit: centrifugal spray rod with adaptive shaft, fixing nut and quick-release sleeve

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

Quantity: 4 pieces per variant: 1 spray rod, 1 adaptive shaft, 1 fixing nut, 1 quick-release sleeve

Coverage: One centrifugal sprinkler position

Side: Not published for this part; matched against the rod you removed

Material: Not published for this part

Colour: Black, as shown in the product images

Dimensions: Not published for this part

Weight: Not published for this part

Thread specification: Not published for this part

Electrical: None — all four pieces are mechanical; the sprinkler cable is separate

Connector: None on any piece of the kit

Mounting position: Between the airframe and the centrifugal sprinkler

Installation method: Mechanical fitting; the joint is secured with the fixing nut and quick-release sleeve; mounting screws not included

Service adjustability: None — the rod is in line or it is not, with no adjustment or app setting that compensates

Condition: Brand new

Classification: DJI OEM spray-system component kit

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🛠️ Installation & Maintenance

Before installation

• Power the aircraft down, remove the battery, and flush and drain the spray system
• Rinse the sprinkler, the rod and the joint so you are not working in chemical residue
• Wear gloves and eye protection; residue collects in the knurling and threads
• Photograph the rod in place from the front, the side and below, including the joint and how the hose and cable are routed and clipped
• Photograph the old joint pieces in their order as they come apart, so the new shaft, nut and sleeve go back the same way
• Check the airframe mount the rod is fixed to; a bent mount has to be dealt with first
• Lay the four new pieces beside the old ones and compare them piece by piece

During installation

• Disconnect the sprinkler cable by its connector body, not by the wire
• Free the hose from the sprinkler and plug or cap the open end so residue does not run into the line
• Release any clips that hold the hose and cable along the rod, noting their positions
• Release the quick-release sleeve and the fixing nut by hand; if residue has seized them, soak with clean water rather than forcing them with a tool
• Remove the sprinkler and set it down with the disks protected, then remove the old rod from the airframe
• Clean the airframe mounting faces before fitting the new rod
• Fit the new rod and tighten its fixings evenly; DJI does not publish a torque figure for this joint, so snug the fixings without forcing them
• Assemble the new adaptive shaft, fixing nut and quick-release sleeve in the order shown in your photographs, starting each thread by hand so it cannot cross-thread
• Refit the sprinkler and re-route the hose and cable exactly as before, with no kinks, twists or rubbing points

After installation

• Compare the two sides from behind and from the side; the sprinklers should now mirror each other
• Repeat the measurement from a fixed airframe point to each sprinkler
• Hold the rod and try to move the sprinkler; there should be no play at the joint
• Release and refit the quick-release sleeve once to confirm it locks cleanly
• Turn the disks by hand with power off to confirm nothing rubs
• Run both sprinklers with clean water, compare the two patterns, and check the hose connection for weeping
• Record the replacement and the cause of damage in the maintenance log

Maintenance between jobs. Rinse the joint with clean water after every chemical day so residue does not dry in the threads and knurling, release and refit the sleeve by hand rather than with tools, and compare the two sprinklers at the end of the day. A joint that starts to feel loose or gritty is easier to clean early than to free once it has seized.

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🚜 Necessary For

This kit is for the people who rebuild T40 and T20P sprinkler positions:

• DJI Agras T40 operators running centrifugal sprinklers
• DJI Agras T20P operators (identified fitment)
• Commercial spray contractors repairing a sprinkler position after a hard landing or canopy strike
• Applicators whose sprinkler joints have loosened or seized after a long season of chemical work
• Agras service centres and repair technicians rebuilding aircraft after a crash
• Fleet managers who keep a complete spray rod set in the trailer kit

This is not the part you need if:

• Only the rod is bent or cracked and the shaft, nut and sleeve are in good condition — the centrifugal spray rod sold on its own is the repair
• Only the fixing nut or the adapter shaft is damaged and the rod is straight — the fixing nut and adapter shaft pair is the repair
• The fault is in the sprinkler head itself — the centrifugal sprinkler repair kit or the centrifugal nozzle kit covers that, not this kit
• Both sprinklers sit symmetrically, the joints are tight, and one side still sprays badly — inspect the spinner disks and the motor
• One sprinkler gets no liquid — look at the solenoid valve and the hose to it
• The airframe arm or landing gear mount is bent — a new rod will sit in the same wrong place until that is fixed
• You fly an Agras model other than the T40 or T20P — this kit is identified for those two aircraft only

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💡 Why This Part Matters

A sprinkler position has two ways to go wrong. The arm can move the sprinkler, or the joint can let it move. Both show up as the same thing in the field: a swath that is not even, a sprinkler that shakes, spray in the wrong place. They are not the same repair.

That is the reason this kit exists alongside the rod sold on its own and the nut and shaft pair. The rod alone restores the arm. The pair restores two of the joint pieces. Neither one restores the whole position. When an impact has bent the arm and split the sleeve, or when a season of chemical work has worn the threads and knurling that hold the sprinkler tight, fitting a new arm onto the old joint leaves half the fault in place, and the sprinkler goes on moving.

The kit replaces all four pieces in one fit: the arm that sets where the sprinkler sits, and the shaft, nut and sleeve that decide whether it stays there. Every surface that meets another piece is new, so nothing new is being asked to seal or grip against something worn.

Equally, if the diagnosis shows only one half failed, the kit is more than the repair needs. A straight rod with a worn joint wants joint pieces. A bent rod on a joint that still locks firmly wants a rod. Settling which half failed takes a few minutes with the aircraft on a level surface and the joint in your hand, and it is the check that makes sure the right pieces arrive first time.

When both halves are suspect, or the old joint pieces are already off the aircraft and you cannot vouch for them, the full kit is the repair that leaves no doubt about any part of the position.

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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 T40 OEM Centrifugal Spray Rod Kit

Brand: DJI

DJI family: Agras

Primary aircraft: DJI Agras T40

Also identified for: DJI Agras T20P

Compatible models: DJI Agras T40, DJI Agras T20P

Fitment basis: Identified for the DJI Agras T40 and T20P

Component: Centrifugal spray rod kit (rod plus joint hardware)

Kit contents: Centrifugal spray rod, spray rod adaptive shaft, spray rod fixing nut, spray rod quick-release sleeve

Aircraft system: Spraying

Installed position: Between the airframe and the centrifugal sprinkler

Primary function: Carries a centrifugal sprinkler out from the airframe, holds its position and angle, and secures the joint that can be released for service

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

Quantity supplied: Four pieces for one sprinkler position, per variant

Not included: Centrifugal sprinkler, centrifugal motor, spinner disks, solenoid valve, hoses, sprinkler cable, clamps, screws

Electrical: None — mechanical parts

Material, dimensions, weight, thread: Not published for this part

Colour: Black

Typical damage: Bent or cracked rod; loose, cracked or seized nut and sleeve; broken shaft fingers

Key diagnostic: Decide whether the arm failed, the joint failed, or both: compare sprinkler symmetry for the arm, and check for movement at the joint with the rod held still

Choosing between related parts: Rod damaged only: the spray rod on its own. Nut or shaft damaged only: the fixing nut and adapter shaft pair. Arm and joint both damaged or worn: this kit

Service interval: None published

Condition: Brand new

Part classification: DJI OEM spray-system component kit

Also searched as: T40 spray rod kit; T40 sprinkler arm kit; T20P spray rod set; T40 spray rod quick-release sleeve; T40 spray rod fixing nut; T40 spray rod adaptive shaft

Disambiguation: Not the spray rod alone, not the fixing nut and adapter shaft pair alone, not a sprinkler repair kit or nozzle kit, not the centrifugal sprinkler or motor

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 T40 centrifugal spray rod kit? It is the full four-piece set for one centrifugal sprinkler position: the spray rod that carries the sprinkler out from the airframe, plus the adaptive shaft, fixing nut and quick-release sleeve that complete its joint.

What exactly is in the box? One centrifugal spray rod, one spray rod adaptive shaft, one spray rod fixing nut and one spray rod quick-release sleeve. The sprinkler, motor, disks, valve, hoses, cable and screws are not included.

Which aircraft does it fit? It is identified for the DJI Agras T40 and T20P. Choose the variant for your aircraft, and send us a photograph of the old rod and joint pieces if you want the match confirmed.

Does it fit other Agras models? It is identified for the T40 and T20P only. For any other Agras aircraft, send us a photograph of the part you removed and we will match it.

What is the DJI part number? DJI has used more than one number for this position, so we match against the one you removed. A photograph of the old rod in place and the joint pieces on the bench is enough.

Should I buy the kit or just the spray rod? If only the rod is bent or cracked and the shaft, nut and sleeve are in good condition, the spray rod on its own is the repair. Choose the kit when the joint pieces are damaged, worn or missing as well.

Should I buy the kit or the fixing nut and adapter shaft pair? If the rod is straight and uncracked and only the nut or shaft has failed, the pair is the repair. The kit adds the rod and the quick-release sleeve.

How do I tell whether the arm or the joint has failed? Compare the two sprinklers on a level surface; a sprinkler out of line points at the arm. Then hold the rod still and try to move the sprinkler; movement at the joint points at the shaft, nut or sleeve.

My sprinkler wobbles but the rod looks straight. Do I need this kit? Probably not the whole kit. A wobble with a straight rod points at the joint, so check the nut, sleeve and shaft first. Replace the joint pieces that are worn or damaged.

The quick-release sleeve will not lock. Is that a reason to replace it? Yes. A sleeve that slips, will not lock or is cracked cannot hold the joint firmly, and the sprinkler will move in flight. Clean it first to rule out residue, then replace it if it still slips.

The fixing nut is seized with chemical residue. What should I do? Soak the joint with clean water and work it free by hand rather than forcing it with a tool. If the nut or its thread is damaged once it is off, replace it.

Can I reuse my old nut and sleeve with a new rod? Only if they are clean, uncracked, lock firmly and show no worn threads or flattened knurling. If you cannot vouch for them, the kit replaces them along with the rod.

Is it an assembly or loose pieces? Loose pieces. The rod, shaft, nut and sleeve arrive separately and are fitted together on the aircraft. Photograph the old set as it comes apart so the new one goes back the same way.

How many kits do I need? One kit per sprinkler position you are rebuilding. If both positions were damaged in the same incident, two kits are needed.

Will this kit fix a sprinkler that will not spin? No. A sprinkler that will not spin points to the motor or its cable and connector. The kit is mechanical and has no electrical parts.

Can I fit it myself? Most operators can. Drain and rinse first, photograph the joint and the hose and cable routing, check the airframe mount, start each thread by hand, and test both sprinklers with clean water afterwards.

Is there a service interval? No published interval. Replace the pieces when the rod is bent or cracked, or when the joint no longer locks firmly, and rinse the joint after every chemical day.