DJI Agras T40 OEM Oil Pipe Cap Plug

The DJI Agras T40 OEM Oil Pipe Cap Plug is the cap and plug for the open end of the field generator's oil and fuel pipe, the fitting that closes the pipe when it is not connected so fuel stays in and dirt stays out. It is a short orange fitting with a barbed hose tail at one end, two flanges with a slotted section between them, and a ribbed screw cap at the other end, with a metal ball chain on split rings tethering the cap to the fitting so the cap cannot be lost. It belongs to the generator that powers the aircraft's battery charging, and it is identified for the DJI Agras T40, T50, T55, T60 and T70. Operators usually reach it while searching for a T40 generator fuel pipe cap, a T50 generator oil pipe plug, a fuel tube stopper for an Agras generator, or a replacement for a cap that has gone missing in the field. 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 T40 / DJI Agras T50 / DJI Agras T55 / DJI Agras T60 / DJI Agras T70 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
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• 📦 Same Day Shipping & Tracking
• Identified for the DJI Agras T40, T50, T55, T60 and T70 generator fuel pipe
• Matched by barbed tail, flange form, ribbed cap and tether against the plug you removed
• Brand new generator part, supplied as one cap plug with its tether chain

Generator fittings look alike and differ in hose size. If you want the match confirmed, photograph the plug you removed, or the open end of the pipe it closes, next to a ruler, and send it to us. We will match it for you.

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📦 Package Includes

• 1 × Oil Pipe Cap Plug: the orange barbed fitting with its ribbed screw cap and metal ball chain tether on split rings, as described for this part

This is one cap plug. The cap, the fitting and the ball chain come together as one piece.

Not included: the fuel or oil hose, hose clamps, the generator fuel tank or its tank cover, filters, pumps or any other generator parts.

Nothing is included because it appears near the plug on the generator. If a hose clamp or another fitting is missing, tell us which one and we will help you identify it.

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🔧 Component Overview

The cap plug is the closure for the generator's fuel pipe. Generators are refuelled, moved and stood on trailers through the season, and a pipe end left open lets fuel out and lets dust, chaff and water in. A plug on the end, with a cap that cannot wander off, is the simple answer.

What it is, as described for this part:

• The barbed hose tail — the ribbed spigot at one end that pushes into the pipe and grips it
• The flanges — two raised rings that stop the fitting and give a grip point
• The slotted section — the open-sided body between the flanges
• The ribbed screw cap — the cap at the other end, ridged around its edge for grip
• The ball chain — a metal bead chain that keeps the cap with the fitting
• The split rings — two small rings that fix the chain to the cap and to the body
• The colour — orange, so it is easy to see on a dark generator and on the ground

It is a small part with one job, and it is easy to lose. That is why the tether matters: a cap on a chain stays with the pipe.

Over a season the cap plug sees:

• Fuel and oil on its inner faces
• Repeated opening and closing at every refuel or service
• Dust, chaff and field dirt around the cap
• Sun and heat on the generator
• Vibration while the generator runs and while it is transported
• Knocks and drops when it is handled in the field

Plugs in this position are replaced for a few real reasons: a cap lost when its chain broke, a cap whose thread or ribs have worn so it no longer closes, a barbed tail cracked so it no longer grips the pipe, or a fitting crushed underfoot or in a trailer.

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⚙️ Functional Purpose

The cap plug's engineering role is closure. It plugs the open end of the generator's fuel pipe and caps it, so the fuel system stays closed when nothing is connected.

On the generator it:

• Plugs the pipe end with its barbed tail
• Closes the fitting with its screw cap
• Keeps fuel and oil from running out of the open pipe
• Keeps dust, chaff and water out of the fuel system
• Keeps the cap tethered to the fitting on its ball chain

What it does not do matters as much:

• It does not filter fuel; the fuel filter is a separate part
• It does not seal a leak along the hose, at a clamp or at the tank
• It is not the generator fuel tank cover, which closes the tank itself
• It is not an oil drain pipe, a high-pressure oil pipe or a fuel hose
• It does not affect how the generator runs; it only closes the pipe

A plug that is in place and capped is doing everything it can do. A wet generator with the plug capped is leaking somewhere else.

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🔍 Diagnosis — fuel found under the generator is traced along the pipe before the cap plug is blamed

Fuel or oil under a generator is often put down to the small fitting at the end of the pipe, because it is the part people open. Sometimes it is. Often the leak is along the hose, at a clamp, at a fitting further back or at the tank, and a new cap plug leaves it exactly where it was.

First, wipe the generator dry around the pipe, the plug and the tank, and let it stand. Then look for where the wet appears first.

Then the plug. Check the cap is screwed fully home, the ribs and thread are not worn smooth, and the barbed tail is pushed fully into the pipe with no crack where it enters.

Then the hose. Look along it for splits, softening, chafing and a clamp that is loose or rusted. A hose split near the plug looks like a leaking plug.

Then the tank and its cover, and any fitting between the tank and the pipe.

Signs the cap plug itself is the part:

• A cap missing, with a broken chain or split ring
• A cap that will not screw fully home
• Worn ribs or thread so the cap turns without closing
• A cracked barbed tail, or one that slides out of the pipe
• A fitting crushed or split

Before replacing the plug, rule out what imitates it:

• A split or softened hose — the leak is in the hose
• A loose or rusted clamp — tighten or replace the clamp
• The tank cover — a separate closure on the tank
• A fitting further back — fuel runs down to the lowest point, which is often the plug
• A cap not screwed home — close it and look again

Use where the wet appears first as your evidence. Fuel runs downhill, so the lowest wet point is not always the leak.

Those checks take minutes with the generator cold and stopped, and they find the leak rather than the most obvious part.

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⚠️ Common Replacement Indicators

Replace the cap plug when inspection confirms one of these:

• The cap is lost or its chain is broken
• The cap will not screw fully home
• The ribs or thread are worn smooth
• The barbed tail is cracked or no longer grips the pipe
• The fitting is crushed or split

Inspect these first, because they produce similar symptoms:

• The fuel hose, for splits, softening and chafing
• The hose clamps, for looseness or rust
• The tank and its cover
• Any fitting between the tank and the pipe

There is no published service interval for the cap plug. It is replaced when it is lost, cracked or no longer closes, not on a schedule.

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📐 Specifications

Product name: DJI Agras T40 OEM Oil Pipe Cap Plug

DJI family: Agras

Primary aircraft: DJI Agras T40

Also identified for: DJI Agras T50; DJI Agras T55; DJI Agras T60; DJI Agras T70

Fitment basis: Identified for the DJI Agras T40 and T50 and T55 and T60 and T70

Aircraft system: Generator — fuel and oil pipe

Component type: Oil pipe cap plug (tethered fuel pipe plug)

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

Generator model: Not published for this part

Quantity: 1 cap plug with tether chain

Form: Barbed hose tail, two flanges with a slotted section, ribbed screw cap, metal ball chain on split rings

Material: Not published for this part

Colour: Orange; metal chain

Hose size: Not published for this part

Dimensions: Not published for this part

Weight: Not published for this part

Pressure rating: Not published for this part

Mounting position: At the open end of the generator's fuel and oil pipe

Installation method: Barbed tail pushed into the pipe; cap screwed on; chain keeps the cap with the fitting

Electrical: None

Condition: Brand new

Classification: Agras generator part

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🛠️ Installation & Maintenance

Before installation

• Stop the generator and let it cool fully
• Work outdoors, away from flames and sparks, with a rag and a tray under the pipe
• Wipe the generator dry and find where any wet appears first
• Photograph the old plug and pipe in place
• Compare the new plug with the old one: barbed tail, flanges and cap

During installation

• Pinch or support the pipe so fuel does not run out while the plug is off
• Ease the old plug out of the pipe; if a clamp holds it, loosen the clamp first
• Check the pipe end for splits and cut back only if your service practice allows it
• Push the new barbed tail fully into the pipe until the flange meets the pipe end
• Refit and snug any clamp over the barbed section
• Screw the cap fully home by hand

After installation

• Wipe away any spilled fuel and let it evaporate before starting the generator
• Check the plug and pipe for weeping after a few minutes
• Confirm the chain hangs clear of hot surfaces and moving parts
• Record the replacement in the maintenance log

Maintenance between jobs. Keep the cap screwed home whenever the pipe is not connected, wipe dirt from around it before opening it and check the chain and split rings for wear. A cap kept on its chain is a cap that does not get lost.

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🚜 Necessary For

This cap plug is for operators and technicians running Agras generators in the field:

• DJI Agras T40 operators running a field generator for battery charging
• DJI Agras T50 and T55 operators (identified fitment)
• DJI Agras T60 and T70 operators (identified fitment)
• Commercial applicators refuelling generators through long days
• Crews who move generators on trailers and lose small parts in transit
• Agras service centres replacing worn or lost generator fittings
• Growers charging their own aircraft from a generator at the field edge

This is not the part you need if:

• The leak is along the hose — replace the hose
• A clamp is loose or rusted — tighten or replace the clamp
• You need the cover for the generator's fuel tank — that is a separate tank cover
• You need an oil drain pipe, a high-pressure oil pipe or a fuel hose — those are separate generator parts
• The cap is only unscrewed — close it
• You fly a T100, T70P, T30 or T25 — this plug is identified only for the T40, T50, T55, T60 and T70

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💡 Why This Part Matters

A generator's fuel pipe is closed or it is open. Open, it lets fuel out and dirt in. The cap plug is the part that closes it, and the chain is what keeps the cap from being left on the ground.

The case for this part is knowing when not to buy it. Fuel under a generator is blamed on the plug because the plug is the part people handle. Fuel runs to the lowest point, and the lowest point is often the plug, whether it is leaking or not.

The checks sort it out. Wipe the generator dry and watch where the wet appears first. Check the cap is home and the tail is whole. Look along the hose and at the clamps. A plug that is lost, cracked or will not close is a plug to replace. A plug that is capped and whole on a wet generator is not the leak.

Those checks take minutes with the generator stopped and cold, and they put the repair where the fuel is actually coming from.

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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 Oil Pipe Cap Plug

Brand: DJI

DJI family: Agras

Primary aircraft: DJI Agras T40

Also identified for: DJI Agras T50; DJI Agras T55; DJI Agras T60; DJI Agras T70

Compatible models: DJI Agras T40; DJI Agras T50; DJI Agras T55; DJI Agras T60; DJI Agras T70

Fitment basis: Identified for the DJI Agras T40 and T50 and T55 and T60 and T70

Component: Oil pipe cap plug (tethered fuel pipe plug)

Aircraft system: Generator fuel and oil pipe

Installed position: At the open end of the generator's fuel and oil pipe

Primary function: Plugs and caps the pipe so fuel stays in and dirt stays out

Form: Orange barbed fitting, two flanges, ribbed screw cap, metal ball chain on split rings

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

Quantity supplied: 1 cap plug with tether chain

Not included: Hose, clamps, fuel tank, tank cover, filters, pumps

Key diagnostic: Wipe the generator dry and find where the wet appears first; a capped, whole plug on a wet generator is not the leak

Common failure modes: Lost cap, broken chain, worn cap thread, cracked barbed tail

Service interval: None published

Condition: Brand new

Part classification: Agras generator part

Also searched as: T40 generator fuel pipe cap; T50 generator oil pipe plug; T55 generator fuel tube stopper; Agras generator fuel line plug; DJI T40/T50 oil pipe cap

Disambiguation: Not the generator fuel tank cover, not an oil drain pipe, not a high-pressure oil pipe, not a fuel hose or fuel filter

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 oil pipe cap plug? The cap and plug for the open end of the field generator's fuel and oil pipe: an orange barbed fitting with a ribbed screw cap tethered on a metal ball chain.

Which aircraft does it go with? It is identified for the generator setup of the DJI Agras T40, T50, T55, T60 and T70. Pick the variant for the aircraft you fly.

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 plug, or the pipe end, next to a ruler and send it to us if you want that confirmed.

Which generator model is it for? No generator model is published for this part. It is identified by aircraft, and we match it against the plug or pipe you have.

Is it for oil or for fuel? It closes the generator's fuel and oil pipe, the line the plug is fitted to on the generator. It is not an engine oil filler cap.

Why does it have a chain? So the cap stays with the fitting when it is unscrewed and is not dropped or lost in the field.

There is fuel under my generator. Is the plug leaking? Maybe, but check first. Wipe the generator dry and see where the wet appears first. Fuel runs to the lowest point, which is often the plug even when the leak is along the hose or at a clamp.

Does it come with a hose or clamp? No. It is the cap plug only, with its tether chain.

Is it the same as the fuel tank cover? No. The tank cover closes the generator's fuel tank. This plug closes the open end of the pipe.

What hose size does it fit? The hose size is not published for this part. Match it against the plug you removed or send us a photograph of the pipe end.

Does it fit the T100 or T70P setup? It is identified only for the T40, T50, T55, T60 and T70.

Can I fit it myself? Yes. With the generator stopped and cold, ease the old plug out, push the new barbed tail fully into the pipe, snug any clamp and screw the cap home.

Does it need any setting up? No. Push it in, cap it and check it does not weep.

How do I keep from losing it again? Keep the cap screwed home whenever the pipe is not connected and check the chain and split rings for wear.