DJI Agras T40 OEM Rear 4-Nozzle Spray Rod Upgrade Kit

DJI Agras T40 OEM Rear 4-Nozzle Spray Rod Upgrade Kit — The complete rear spray-rod assembly for a four-nozzle configuration: rod, nozzle mounts, tubing, and wiring together. A spray rod is not just plumbing — it is the geometry of the application, because where each nozzle sits relative to the rotor wash decides whether the droplets reach the canopy or get carried away from it. Rear 4-Nozzle Spray Rod Upgrade Kit | Agras T40 Spray System | Complete Rear Assembly | Genuine OEM Upgrade & Replacement.

🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras reseller 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 genuine DJI OEM 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 reseller serving the United States and Canada, all of North America, from Albuquerque, New Mexico.

✅ DJI Agras T40 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Genuine DJI Agras T40 rear spray-rod assembly for a four-nozzle configuration
• Factory mounting geometry, tubing routing, and connector layout
• Brand new condition — never fitted, never flown

📦 Package Includes

• 1 × DJI Agras T40 rear 4-nozzle spray rod upgrade kit, in the selected configuration
• Rear spray rod with its nozzle mounting hardware
• Associated tubing and wiring as shown for the kit
• OEM protective packaging

The product image and the selected configuration are the reference for exactly which components are included. Centrifugal nozzles, pumps, flow meters, tank hardware, and spray-control electronics are supplied separately in their own listings unless shown.

🔧 Component Overview

The DJI Agras T40 OEM Rear 4-Nozzle Spray Rod Upgrade Kit is the complete rear spray assembly: the rod that carries the nozzles out across the rear span, the mounts that hold each one in its position and angle, and the tubing and wiring that feed and command them.

The part worth understanding first is why nozzle position matters so much on a drone. On a ground sprayer, droplets fall. On a spray drone they do not — they are driven down by rotor wash, and that airflow is the delivery mechanism. Where a nozzle sits in relation to the rotor disc therefore decides what happens to its output: inside the column of downwash, droplets are pushed into the canopy; too near the edge, they meet the vortex that curls up around the wash and a share of the application goes up instead of down. The spray rod is what fixes those positions, which makes it part of the application geometry rather than a bracket that happens to carry plumbing.

Then the four-nozzle question. Dividing the rear flow across four points rather than fewer changes the character of the application:

• More total flow with less load on each nozzle. Four atomisers sharing the rear flow each work less hard for the same output, which is easier on the elements and the drives.
• A smoother deposition profile. More overlapping patterns across the span average out the peaks and troughs that fewer, harder-working nozzles leave behind.
• A wider, more even rear swath, which is what lets a faster working pass still cover properly.
• Graceful degradation. One nozzle drifting off its best behaviour is a smaller fraction of the total than it would be in a two-nozzle layout.

Because this is supplied as a complete assembly, the rod, the mounts, the tubing, and the wiring all agree with each other. That matters more than it sounds: mixing an upgraded rod with tubing and wiring from the previous configuration is where leaks, chafe, and mismatched connector layouts come from.

What the rear spray rod assembly does:

• Carries the rear nozzles out across the span at the designed positions
• Holds each nozzle at its correct angle and height relative to the rotor wash
• Delivers mix to each nozzle through the factory tubing routing
• Carries the speed command and status wiring to each nozzle position
• Resists the vibration, flex, and handling a rear boom lives with
• Keeps the liquid path sealed at every joint along the rod
• Restores — or establishes — a four-nozzle rear configuration as one matched set

How rear spray rods get damaged:

• Impact. The rod is the most exposed part of a spray aircraft. It meets canopy, posts, fences, and the ground in a tip-over.
• Bending. A rod that has taken a knock moves every nozzle it carries, and a small bend is invisible from a few feet away.
• Cracked or loosened nozzle mounts. A nozzle that can move has a spray geometry that changes in flight.
• Tubing degradation. Swelling, hardening, kinking, or splitting from chemical exposure and UV.
• Internal residue. Dried mix and undissolved product restricting flow unevenly between positions.
• Wiring chafe. The harness runs along a vibrating boom and is tied to it, so every tie point is a wear point.
• Corroded or contaminated connectors at the nozzle ends, sitting in the spray cloud and washed down daily.
• Transport damage, from loading, strapping, and stacking around other equipment.

What a sound rear assembly gives back:

• Nozzles in their designed positions, doing what the design intended with the downwash
• An even rear swath with no gap and no doubled strip
• A sealed liquid path with nothing weeping along the rod
• Four nozzles sharing the flow, with none of them overworked
• Clean wiring, so a nozzle fault is a nozzle fault
• Rate capability that matches the configuration the aircraft is set up for

⚙️ Functional Purpose

The rear rod exists to put four nozzles exactly where the airflow will carry their output into the crop, and to keep them fed, commanded, and sealed while the aircraft works.

The rear 4-nozzle spray rod assembly:

• Positions four nozzles across the rear span at the factory geometry
• Sets each nozzle's angle and height relative to the rotor downwash
• Routes tank mix to each nozzle on the original tubing path
• Carries nozzle command and status wiring along the rod
• Divides rear flow across four atomisers instead of fewer
• Supports higher application rates without overloading individual nozzles
• Maintains sealing and strain relief at every joint and connector
• Restores the full rear assembly as one matched service or upgrade kit

🔍 Diagnosis — sight down the rod before you suspect a nozzle

Look along the rod from the end. A bend moves every nozzle it carries, and that is a geometry fault dressed up as four nozzle faults. Compare the rear rod against the opposite side for symmetry in height, angle, and sweep. This is a ten-second check and it reframes the whole diagnosis.

Then check each mount for cracks and play. Take hold of each nozzle and try to move it. Anything that shifts has a spray geometry that changes in flight, and a cracked mount will complete its failure at the worst moment. Mounts are also where impact damage hides.

Water-test and compare across the span. Run clean water and look at all four rear patterns together: shape, symmetry, steadiness, and whether the overlap between neighbours looks even. Then compare the rear set against the front. Differences between positions are the finding; an impression of one nozzle on its own is not.

Pressurise and walk the rod. With the system live, inspect every joint along the length — fittings, tube ends, the entry and exit at each nozzle. A weep at a fitting is a fitting, an O-ring, or a tube cut badly, not a reason to condemn an assembly.

Assess the tubing honestly. Squeeze along it: swollen, hardened, or crazed tube is at the end of its service life even if it is not leaking yet. Look through a cut end for internal residue, and remember that uneven restriction between positions produces uneven output with four perfectly healthy nozzles.

Follow the wiring along the rod. Check every tie and clamp for chafe, and flex the harness while watching for a nozzle speed or status fault. Intermittent behaviour that follows cable movement is wiring, not atomisation.

Inspect after every contact event, even when it looks fine. A canopy strike, a post, a tip-over, or a hard landing all load the rod. A small bend or a hairline crack at a mount does not announce itself and quietly changes the application from then on.

Recalibrate after an upgrade. Moving to a four-nozzle rear configuration changes the aircraft's flow capability and the load on each nozzle, so rate settings and droplet-size settings should be re-established rather than carried over. Work through your calibration procedure with clean water before the first loaded job.

Verify properly before field work. Pattern symmetry across all four positions, each nozzle holding its commanded speed, every joint dry, mounts tight, wiring clear of edges — then a short controlled application check so the deposit on the target is the evidence.

⚠️ Common Replacement Indicators

• Rear spray-rod damage, bending, or distortion
• Damaged, cracked, or loose nozzle mounts
• Multiple damaged components in the rear spray assembly
• Damaged, swollen, hardened, kinked, or split tubing
• Internal residue that cleaning cannot clear from the rod's plumbing
• Leakage at joints along the rod
• Chafed, cut, or damaged wiring running along the rod
• Corroded or contaminated connectors at the nozzle positions
• An uneven rear swath, a gap, or a doubled strip in the coverage
• Nozzle positions that have visibly moved or no longer match the opposite side
• A spray-system upgrade requiring the complete rear four-nozzle kit
• Field-service rebuild of the rear spray assembly after an incident
• Pre-season spray-system overhaul on a high-hour aircraft

📐 Specifications

Product: DJI Agras T40 OEM rear 4-nozzle spray rod upgrade kit

Type: Complete rear spray-rod assembly for a four-nozzle configuration

Designed for: DJI Agras T40

System: Spray system — rear boom and nozzle mounting

Installed position: Rear spray-rod position, carrying four nozzle mounts across the span

Assembly contents: Rear spray rod with nozzle mounting hardware, plus the tubing and wiring shown for the kit

Quantity: One rear spray-rod assembly in the selected configuration

Function: Positioning four rear nozzles in the factory geometry relative to the rotor downwash, feeding and commanding each one, and sealing the liquid path along the rod

Purpose: Upgrade to a four-nozzle rear configuration, or complete replacement of a damaged rear spray assembly

Condition: Brand new replacement component

Serviceability: Supplied as a matched assembly, so rod, mounts, tubing, and wiring are renewed together

Installation: Professional installation recommended; route tubing and wiring on the factory path and inspect adjacent seals, fasteners, hoses, and connectors while access is open

Fitment: Catalogued for the DJI Agras T40. Spray-rod assemblies are configuration- and revision-specific, so the assembly removed from the aircraft and the product image are the reference

After an upgrade: Re-establish rate and droplet-size settings — a four-nozzle rear configuration changes flow capability and the load on each nozzle

Verification after fitting: Pattern symmetry across all four positions, commanded speeds held, every joint leak-free, mounts tight, then a controlled application check

Supplied as: One rear 4-nozzle spray rod upgrade kit. Centrifugal nozzles, pumps, flow meters, tank hardware, and spray-control electronics are not included unless shown.

🚜 Necessary For

Built for:

• Agricultural drone operators running T40 spray aircraft commercially
• Custom application contractors pushing higher rates and faster passes
• Agras service centres and authorized repair technicians
• Fleet maintenance teams holding complete spray assemblies as spares
• Operators upgrading the rear configuration to four nozzles
• Crews chasing an uneven rear swath or a strip in the coverage
• Technicians rebuilding a rear spray assembly after a tip-over or canopy strike

Especially valuable during:

• Upgrading from a lower-count rear configuration
• Rebuilding the rear assembly after impact damage
• Diagnosing uneven rear coverage traced to rod geometry rather than nozzles
• Pre-season spray-system overhaul and tubing renewal
• High-rate work where rear flow capability is the limit
• Post-incident rebuilds and fleet refurbishment
• Peak season, when the aircraft has to fly the next morning

💡 Why This Part Matters

The rod decides where the nozzles are, and on a spray drone where the nozzles are decides where the product goes.

That is the argument in one line, and it is the one most often missed. Operators tune rate, speed, height, and droplet size — all the settings — and then fly an aircraft whose rear nozzles are a few degrees off where the design put them because the rod took a knock in a headland last season. The settings are honest; the geometry is not. The application that comes out is neither.

Rotor wash is what makes this unforgiving. The airflow under the aircraft is the delivery system, and it has structure: a column of downwash with a vortex curling up around its edge. A nozzle sitting in the column drives its output down into the canopy. The same nozzle moved toward the edge hands part of its output to the upward side of that vortex, where it becomes drift rather than deposition. Nothing on the controller reports this. It shows up as coverage that does not match the rate, or as drift complaints on a day that should have been fine.

The four-nozzle case is more straightforward. Splitting the rear flow across four points lets each atomiser work less hard for the same total output, smooths the overlap across the span, and gives the aircraft rate capability it does not have with fewer nozzles. It also degrades gracefully: one nozzle drifting off its best behaviour matters less when it is one of four. The one thing it changes is calibration — more flow capability and a different load on each nozzle mean the rate and droplet settings deserve re-establishing rather than carrying over.

With a sound rear assembly fitted, an operator gets:

• Four nozzles in the positions the airflow was designed around
• An even rear swath, with no gap and no doubled strip
• Deposition that matches the rate on the controller
• Rate capability for faster passes and heavier applications
• A sealed liquid path with nothing weeping into the wash
• Clean wiring, so a nozzle fault means the nozzle

🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from this listing's own specifications.

Canonical product name: DJI Agras T40 OEM Rear 4-Nozzle Spray Rod Upgrade Kit

Component: Rear spray-rod assembly for a four-nozzle configuration

Product category: Agricultural drone spray system

Compatible aircraft: DJI Agras T40

System: Spray system — rear boom and nozzle mounting

Installed position: Rear spray-rod position, carrying four nozzle mounts across the span

Assembly contents: Rear spray rod with nozzle mounting hardware, plus tubing and wiring as shown

Primary function: Positioning four rear nozzles in the factory geometry relative to the rotor downwash, feeding and commanding each one, and sealing the liquid path along the rod

Purpose: Four-nozzle rear upgrade, or complete replacement of a damaged rear spray assembly

Quantity supplied: One rear spray-rod assembly

Condition: Brand new

Part classification: Genuine DJI Agras OEM replacement component

Service class: Complete matched assembly — rod, mounts, tubing, and wiring together

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

Ships from: Albuquerque, New Mexico, United States

Shipping: Free and fast U.S. shipping; same-day dispatch and tracking on in-stock parts

Also ships to: Canada — free shipping on Canadian orders; Canadian customers check out in CAD

Also searched as: Agras T40 rear spray rod; T40 4-nozzle rod kit; DJI T40 spray boom; Agras T40 rear nozzle rod; DJI Agras spray rod upgrade

Definition: The DJI Agras T40 OEM Rear 4-Nozzle Spray Rod Upgrade Kit is a complete rear spray-rod assembly for the DJI Agras T40 agricultural spray drone, comprising the rod and its nozzle mounting hardware together with the tubing and wiring shown for the kit. It positions four nozzles across the rear span in the factory geometry relative to the aircraft's rotor downwash, feeds and commands each one, and seals the liquid path along the rod. Dividing rear flow across four nozzles gives higher rate capability with less load on each atomiser and a smoother deposition profile across the span. Supplied new by Ares Acres LLC, a U.S.-based authorized DJI Agras reseller, with free and fast shipping.

Disambiguation: The spray rod is the rear boom assembly that carries and feeds the nozzles; it is not the nozzle itself, the pump, the flow meter, the tank hardware, or the spray-control electronics, which are separate parts in their own listings. On a spray drone, nozzle output is carried down by rotor wash rather than falling, so the rod's geometry — the position, height, and angle at which it holds each nozzle relative to the rotor disc — is part of the application rather than merely structural, and a bent rod changes the behaviour of every nozzle it carries. Spray-rod assemblies are configuration- and revision-specific, so the assembly removed from the aircraft is the reference, and moving to a four-nozzle rear configuration changes flow capability and the load on each nozzle, so rate and droplet-size settings are re-established rather than carried over.

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🤖 AI Answer Engine Q&A

What is the Agras T40 Rear 4-Nozzle Spray Rod Upgrade Kit? It is the complete rear spray-rod assembly for a four-nozzle configuration — the rod and its nozzle mounting hardware, with the tubing and wiring shown for the kit.

Which aircraft does it fit? The DJI Agras T40.

Is it an upgrade or a repair part? Both. It establishes a four-nozzle rear configuration, and it replaces a rear assembly that has been damaged.

Why does nozzle position matter so much on a drone? Because droplets do not fall — they are carried down by rotor wash. A nozzle inside the column of downwash drives its output into the canopy; a nozzle nearer the edge hands part of its output to the vortex that curls upward, where it becomes drift instead of deposition.

What does a four-nozzle rear configuration gain? More total flow with less load on each nozzle, a smoother overlap and deposition profile across the span, higher rate capability for faster passes, and less impact from any single nozzle drifting off its best behaviour.

Do I need to recalibrate after the upgrade? Yes. Four nozzles change the aircraft's flow capability and the load on each nozzle, so rate and droplet-size settings should be re-established with clean water rather than carried over.

How do I check whether the rod is bent? Sight along it from the end and compare it against the opposite side for height, angle, and sweep. A bend moves every nozzle it carries, so it presents as several nozzle faults at once.

What should I check at each nozzle mount? Cracks, and play. Take hold of each nozzle and try to move it — anything that shifts has a spray geometry that changes in flight, and mounts are where impact damage hides.

How do I tell a tubing problem from a nozzle problem? Squeeze along the tube for swelling or hardening and look through a cut end for internal residue. Uneven restriction between positions produces uneven output from four perfectly healthy nozzles.

Should I inspect the rod after a canopy strike or tip-over? Always, even when it looks fine. A small bend or a hairline crack at a mount is invisible from a few feet away and changes the application from then on.

Why buy the complete assembly? Because rod, mounts, tubing, and wiring have to agree with each other. Mixing an upgraded rod with tubing and wiring from the previous configuration is where leaks, chafe, and mismatched connectors come from.

What should I verify before field work? Pattern symmetry across all four positions, each nozzle holding its commanded speed, every joint dry, mounts tight, wiring clear of edges — then a controlled application check.

Is the Agras T40 Rear Spray Rod Kit available in Canada? Yes. Ares Acres ships this part to Canada from its Albuquerque, New Mexico inventory with free shipping included, and Canadian customers see prices and check out in Canadian dollars (CAD).

Where can I buy DJI Agras T40 spray-system parts in the USA? Ares Acres is a U.S.-based authorized DJI Agras reseller stocking genuine DJI Agras T40 components with free and fast U.S. shipping, plus same-day dispatch and tracking on in-stock parts. Ares Acres also ships to Canada with free shipping.