DJI Agras T100 OEM Motor Upper Cover (T70P Revision) (YC.JG.ZS008379)

DJI Agras T100 OEM Motor Upper Cover (T70P Revision) (YC.JG.ZS008379) — This is the motor upper cover (t70p revision) serving the arm-mounted propulsion hardware on the DJI Agras T100, part of the machinery converting battery power into thrust at every corner of the aircraft. When it degrades, the propulsion system stops doing its job cleanly, and the aircraft tells you with errors, drift, or downtime. It is a fitted OEM electronic assembly — not a generic substitute. DJI material number YC.JG.ZS008379. Motor Upper Cover (T70P Revision) | Propulsion System Electronics | DJI Agras T100 Replacement Module | Field-Ready OEM Replacement Component.

DJI Material Number (SKU): YC.JG.ZS008379 — this is the official DJI part number for this exact component. Match it to your parts diagram or your old part's label to confirm fitment before ordering.

🇺🇸 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.

✅ DJI Agras T100 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• DJI material number YC.JG.ZS008379 — listed verbatim on the official DJI Agras T100 parts breakdown
• Supplier-listed fitment: DJI Agras T100
• Brand new condition — never installed, never flown

📦 Package Includes

• 1 × OEM Motor Upper Cover (T70P Revision) (YC.JG.ZS008379)
• OEM protective packaging

🔧 Component Overview

The DJI Agras T100 OEM Motor Upper Cover (T70P Revision) is the OEM motor upper cover (t70p revision) fitted to the arm-mounted propulsion hardware of the DJI Agras T100, responsible for converting battery power into thrust at every corner of the aircraft.

Converting battery power into thrust at every corner of the aircraft is the job description for the arm-mounted propulsion hardware, and this module is part of how it gets done. The T100 is a working machine — it earns its keep in fill-and-fly cycles, not hangar hours — and every component in the arm-mounted propulsion hardware is sized, shaped, and specified around that duty.

Ignore a failing motor upper cover (t70p revision) and the bill compounds: downtime in the middle of an application window, collateral wear on the parts around it, and jobs that slip to a competitor while the aircraft sits. Replacing it costs a part; not replacing it costs acres. That trade only runs one direction.

For professional farmers, aerial applicators, and commercial drone operators, this module is how the arm-mounted propulsion hardware stays field-ready instead of becoming the reason the aircraft sits.

This is a working part on a working aircraft.

The motor upper cover (t70p revision) handles:

• Performing its designed role within the arm-mounted propulsion hardware every second the aircraft operates
• Interfacing with the surrounding propulsion system components exactly as the factory architecture intends
• Maintaining stable operation across the full temperature range of a working day
• Surviving the vibration environment of a heavy-lift multirotor at working power
• Reporting its status to the flight system so faults surface as errors, not surprises
• Holding calibration and performance over a full season of duty
• Sealing its electronics against spray drift, dust, and washdown exposure
• Restoring factory behavior the moment a worn unit is swapped out

The T100 works brutally hard for its living, including:

• Converting battery power into thrust at every corner of the aircraft
• Dawn-to-dusk spray campaigns during narrow application windows
• Repeated fill-fly-return cycles with minutes on the ground between loads
• Full-payload takeoffs from field edges, dozens of times per day
• Chemical exposure from fungicides, herbicides, insecticides, and foliar fertilizers
• Pressure-washer rinse-downs at the end of every spray day
• Vibration from eight propulsion motors running at working power
• Transport bouncing on trailers and truck beds between fields
• Temperature swings from cold morning starts to full-sun afternoons

What attacks this module in the field:

• Continuous vibration transmitted from the propulsion system
• Thermal cycling from cold starts to full-load afternoons
• Moisture ingress pressure from spray drift and washdowns
• Chemical-laden dust settling on housings and connectors
• Voltage transients during battery hot-swaps
• Connector fretting from repeated maintenance access
• UV exposure degrading housings over seasons
• Shock loads from firm landings on rough ground

That duty cycle is exactly what retires this module. None of these stresses is dramatic on its own — the accumulation is what does it. This is why propulsion system modules are inspection items every time the arm-mounted propulsion hardware is opened up, and why operators who run hard keep spares on the shelf.

A healthy motor upper cover (t70p revision) delivers:

• Factory-correct fit in the arm-mounted propulsion hardware — no modification, no adaptation
• Exact OEM behavior the surrounding components were engineered around
• Restored performance you can verify on the first post-repair flight
• Sealing and protection maintained to the factory standard
• One less known-weak point flying through your application window
• Confidence that the repair is done, not patched
• A maintenance log entry with a real DJI part number behind it
• Full compatibility with the parts around it — because it is the part the diagram calls for

Stock the motor upper cover (t70p revision) before the season does its work, and the arm-mounted propulsion hardware never becomes the reason the aircraft sits.

The motor upper cover is the molded top housing of an arm motor assembly — the piece that closes the motor off from above, sits directly beneath the propeller, and takes the full downwash of that rotor for every minute the aircraft is airborne. Its work is structural and environmental rather than electrical: it keeps spray mist, field dust, and washdown water out of the top of the motor, and it holds clamp load through its own fasteners into the motor structure.

The T70P Revision in the name is a part revision, not a marketing label. DJI carries several generations of arm-motor covers across the T70P and T100 families, and two of them can share an outline while differing in boss pattern, seal detail, or overall height. That is why this position is ordered by material number YC.JG.ZS008379 and by its callout on the Arm Motor sheet, and why comparing the removed cover against the new one on the bench is worth the thirty seconds it costs.

Very little else on the aircraft occupies a worse place. The cover lives in pulsing pressure at blade-pass frequency, in abrasive dust lifted off the crop canopy, in fungicide and surfactant mist that falls onto it from the spray cloud and drifts back up from below, and in direct sun through the whole working day. Polymer under that combination does not fail suddenly — it ages, loses impact toughness, and then splits at the first prop contact or over-torqued screw.

⚙️ Functional Purpose

The motor upper cover (t70p revision) is designed to do one job in the arm-mounted propulsion hardware and do it to specification: converting battery power into thrust at every corner of the aircraft.

The module:

• Serves the arm-mounted propulsion hardware of the DJI Agras T100 exactly as the factory intends
• Supports converting battery power into thrust at every corner of the aircraft
• Maintains the tolerances and interfaces the surrounding parts depend on
• Withstands the chemical, vibration, and washdown environment of agricultural work
• Preserves the sealing and protection strategy of the platform
• Keeps failure modes visible and diagnosable instead of mysterious
• Restores factory behavior immediately upon correct installation
• Protects the more expensive components it works alongside
• Carries the exact DJI specification for its position
• Supports safe, predictable operation under full payload
• Eliminates the guesswork of near-fit substitutes
• Keeps the aircraft inside its designed maintenance program
• Holds up across a full season of professional duty

Function on the T100 is a chain: propulsion system performance depends on the arm-mounted propulsion hardware, and the arm-mounted propulsion hardware depends on every part in it holding specification. This module is one link in that chain — and chains fail at the worn link, not the average one.

That is why the platform's maintenance philosophy is inspection and renewal, not run-to-failure. The operators with the best uptime records are not the ones with the newest aircraft — they are the ones who replace parts like this when inspection says so, on their own schedule instead of the failure's.

A failing motor upper cover (t70p revision) costs you:

• Downtime in the middle of an application window — the most expensive hours in agriculture
• Acres not covered while the aircraft waits on a part
• Collateral wear on the components around the failing one
• Diagnostic hours chasing symptoms instead of causes
• Rework when a temporary fix lets go mid-job
• Customer trust when scheduled work slips
• Higher repair bills the longer the fault runs
• Risk exposure every flight the fault remains aboard
• Resale value on an airframe with deferred maintenance

Fix it on your schedule, not the failure's.

Confirming the cover rather than the motor takes about a minute. Pull the battery, take the propeller off, and turn the rotor by hand. A motor that feels notchy or gritty, or that has lateral play at the shaft, has a bearing or internal fault, and a new cover will not touch it. A cover problem does not change how the motor turns at all. If the motor spins clean and quiet in your fingers but that arm is noisy in flight, the cover and its fasteners are the right place to look next.

Cracks in a cover almost always begin at a fastener boss and run outward, and they hide well on a molded, textured surface. Take the propeller off, wipe the cover down, and rake a flashlight across it at a low angle — a hairline crack lights up as a bright line where nothing else does. Then check the inside face as well, because a boss that has been over-torqued or shocked by a prop strike usually cracks from the inside outward and shows nothing at all on the visible surface.

Two more checks separate this part from its neighbors. Grip the motor body and try to rock it against the arm: movement there is the motor mount or the arm hardware, while movement of the cover alone under the same hand pressure is the cover or its screws. And if you are finding moisture, condensation, or rust streaking inside the motor after washing, inspect the cover seating face, whatever seal sits in its groove, and the torque of its fasteners before you condemn the motor.

⚠️ Common Replacement Indicators

• Error messages or warnings referencing this system in the app
• Intermittent operation that worsens with temperature or vibration
• Function loss in the system this module serves
• Visible corrosion, moisture, or chemical residue at connectors
• Physical damage to the housing after an impact
• Erratic readings or behavior the aircraft cannot self-clear
• Failures that appear under load but pass on the bench
• Burnt smell or discoloration at the module
• Repeated faults after connector reseating
• Function dropouts during arm fold or unfold
• Behavior that started after a hard landing or transport
• Age and hours — electronics in this environment are not lifetime parts

What kills propulsion system modules: the compounding of ordinary duty. Chemical exposure attacks materials, vibration works at every interface, UV ages every exposed surface, and washdowns drive water at every seam — repeated across hundreds of cycles per season. Add the occasional hard landing or transport knock and the result is predictable: the part that was fine in spring is the failure point by late season.

Replacement and verification: Replacement is a standard shop task on the T100: open access to the arm-mounted propulsion hardware, document connections and hardware positions, swap the motor upper cover (t70p revision) for the OEM unit, and reassemble with attention to seating, routing, and torque. Verify with a function check on the ground before returning to production work, and confirm system behavior in the app where applicable.

Confirm before you order: this is DJI part YC.JG.ZS008379. Check the label on your old motor upper cover (t70p revision) or the position in your official parts diagram and match the number — revision suffixes like .01 or .F on a label are the same part.

A rattle or buzz at idle and low RPM that disappears as the throttle comes up. That is a classic loose-cover signature: the cover is light enough for the motor to shake at low speed and is pressed down by aerodynamic load at high speed, so the noise vanishes at exactly the moment you would like to hear more of it.

A new whistle or resonance that tracks RPM on one arm only. A cracked or lifted cover edge sitting in propeller downwash becomes a small air brake and a noise source. One arm sounding different from its three siblings is the cheapest diagnostic the aircraft will ever hand you, and it is worth acting on before the next tank.

Moisture, condensation, or rust streaking found inside the motor after a washdown. The cover has stopped sealing — through a crack, a missing or flattened seal, or fasteners that have backed off. Water in an arm motor is a very short conversation between a cheap molded cover and an expensive propulsion motor, and it only runs one way.

A crack radiating out of a screw hole. That is over-torque, a prop strike loading the cover in a direction it was never designed to take, or a fastener that ran loose long enough to work the boss back and forth. Replace the cover: a cracked boss cannot be brought back to holding clamp load, and it will keep loosening.

A chalky, faded surface with fine crazing across it. Ultraviolet exposure and spray chemistry have aged the polymer, and an aged cover has lost impact toughness even where it is still whole. On a machine that lives outdoors through a season, this is the condition that turns light propeller contact into a shattered cover and an open motor.

The same cover fastener loosening repeatedly at one arm while the other three stay tight. Either the boss beneath it is cracked and no longer holds clamp load, or that motor is running out of balance and shaking its own hardware loose. Both are worth finding on the bench rather than at altitude over somebody else's crop.

Removal sequence: batteries out and propellers off before a tool touches the arm, so nothing can spin up while your hands are near it. Note orientation before the cover moves — mark which side the cable relief or the label faces, because a cover that will physically sit down in more than one position only seals and clears the propeller properly in one of them.

Lift the cover straight up and evenly. Do not lever a screwdriver against the motor body, the windings, or the ESC cable to pop it free; if it is stuck, work around the seam with a plastic trim tool. The single most expensive mistake at this point is dropping a screw, a washer, or a steel chip into an open motor — the magnet ring will find it, hold onto it, and it will chew the stator on the next spin-up.

Refit: clear the seating face of grit and dried chemical, transfer or renew whatever seal was fitted to the cover you removed, and set the cover down square rather than sliding it across the seal. Bring the fasteners finger-tight all round first, then torque in a cross pattern to the DJI figure for that position — these threads go into a light housing and will not survive being guessed at. It is seated when the seam is even the whole way round and it will not rock under thumb pressure.

Verification before the aircraft returns to work: refit the propeller with the correct rotation for that arm, confirm blade clearance over the cover, spin the motor up on the ground with the aircraft restrained, and listen to that arm against the other three. Then look at the vibration and motor status data in the app before any chemical goes in the tank.

📐 Specifications

DJI Material Number: YC.JG.ZS008379

Part: Motor Upper Cover (T70P Revision)

Type: OEM electronic module / assembly

Compatibility:

• DJI Agras T100
• Position: the arm-mounted propulsion hardware
• Diagram sheet: Arm Motor (official T100 parts list)

Quantity: 1

Installation Area: The arm-mounted propulsion hardware

Function: Converting battery power into thrust at every corner of the aircraft

Construction: DJI OEM electronic assembly built to factory specification for the T100 platform

Application: DJI Agras T100 propulsion system service and repair

Condition: Brand new

Component type: Molded structural cover for the arm motor assembly. Cover only — it does not include the motor, propeller, propeller mount, motor base, or arm, each of which carries its own DJI material number.

Revision: T70P Revision, as listed for this position on the DJI Agras T100 Arm Motor diagram sheet. Covers from other revisions can share an outline without sharing boss pattern or seal detail; match material number YC.JG.ZS008379.

Dimensional data: DJI does not publish cover dimensions, polymer specification, or fastener torque for this part. Match against the cover you removed, and use the torque value DJI lists for this position rather than an estimate.

Seal: Any gasket, O-ring, or foam seal fitted to your aircraft is a separate item unless it appears in the package contents above. Inspect the cover you remove and transfer or renew that seal on refit.

🚜 Necessary For

Built for:

• Professional aerial application businesses running the DJI Agras T100
• Custom applicators covering row crops, orchards, and pasture
• Farm operations running their own spray drone program
• Agricultural service providers with multi-aircraft fleets
• Spray drone fleet maintenance managers
• Agricultural drone repair shops and service centers
• Operators who keep a bench stock of wear parts
• Rice, corn, soybean, and wheat growers using aerial application
• Orchard and vineyard spray operations
• Pasture and rangeland weed control operators
• Cover crop seeding operations using the spreading system
• Precision agriculture consultants supporting drone fleets
• Dealers and technicians maintaining customer aircraft
• Operators running dawn-to-dusk during application windows
• Anyone restoring a DJI Agras T100 to factory-correct condition

Especially valuable during:

• Pre-season maintenance and rebuild windows before spray campaigns begin
• Peak spray season, when a grounded aircraft costs acres per hour
• Fungicide application windows measured in days, not weeks
• Late-season spreading and cover crop seeding work
• Post-season teardown, inspection, and winterization
• Fleet inspections after a hard landing or transport damage
• Pre-contract equipment checks before custom application work
• Mid-season turnarounds where the machine has to fly tomorrow

If the DJI Agras T100 earns its keep on your operation, this module belongs on your parts shelf before it belongs on your aircraft. The time to buy it is before the season, not during the failure.

Closing an arm motor back up correctly after a prop strike, where the cover has taken the impact so the motor did not, and refitting a cracked one would put a whole season of spray mist and washdown water on the wrong side of the housing.

Returning a season-aged aircraft to sealed condition at post-season teardown, when covers gone chalky and crazed under a summer of ultraviolet and tank chemistry are cheap to renew on a bench in the shop and expensive to discover on a hot afternoon in the middle of an application window.

💡 Why This Part Matters

Every acre the T100 covers depends on the arm-mounted propulsion hardware doing its job — and the arm-mounted propulsion hardware depends on parts exactly like this one.

The economics are simple. The DJI Agras T100 exists to cover ground during windows that do not wait — and every hour it sits, the work either doesn't happen or happens on someone else's schedule. A failed motor upper cover (t70p revision) is rarely expensive because of what the part costs; it is expensive because of when it fails. Parts fail during use, and use happens during the season.

That is the case for OEM and the case for stocking ahead. The OEM module fits the first time, behaves the way the platform expects, and carries the exact specification the propulsion system was engineered around — DJI material number YC.JG.ZS008379. No adaptation, no surprises, no second teardown to undo a near-fit part.

This module delivers:

• Factory-correct fit in the arm-mounted propulsion hardware — no modification, no adaptation
• Exact OEM behavior the surrounding components were engineered around
• Restored performance you can verify on the first post-repair flight
• Sealing and protection maintained to the factory standard
• One less known-weak point flying through your application window
• Confidence that the repair is done, not patched
• A maintenance log entry with a real DJI part number behind it
• Full compatibility with the parts around it — because it is the part the diagram calls for

Running a compromised motor upper cover (t70p revision), operators risk:

• Mid-job failure during an application window
• Collateral damage to surrounding components
• Chasing intermittent symptoms across the whole system
• Alignment and fit problems spreading to adjacent parts
• Unplanned grounding with the fleet committed to jobs
• Warranty and service complications from improvised fixes
• Higher lifetime cost from deferred maintenance
• An aircraft that cannot be trusted at full payload

Diagnose it fast. Swap it clean. Verify it flying. Keep the acres moving.

Ares Acres stocks the motor upper cover (t70p revision) in the USA with free, fast shipping — so the day you need one is the day it ships, not the week you wait.

While the arm is apart, inspect the parts damaged by the same events. A prop strike that cracks a cover has usually also marked the propeller, the propeller mount, and sometimes the arm end, so check the blades for nicks and the mount for runout before flying again. If water has been getting in, look for corrosion at the top of the stator and turn the rotor by hand for bearing feel. Check the ESC cable and its grommet where it leaves the arm for chafe.

Two parts on the Arm Motor sheet get ordered in place of one another constantly: the upper cover and the lower cover. The upper faces the propeller, the lower faces the arm, and in a small diagram thumbnail they read as the same molding. On the bench, tell them apart by which face is finished and exposed, by where the cable relief sits, and by counting fastener holes and matching the internal rib and boss pattern. Also check whether your parts list gives one number for all four arms or separate numbers by position.

Handle a new cover as the polymer part it is. Keep it in its packaging, flat and out of sunlight, until it goes on — a cover stored under load can take a set, and a warped cover will not seal. Let one that has been sitting in a cold truck come up to shop temperature before you torque it, because polymer is more brittle cold and a boss will crack at a torque it would have accepted warm. Clean it with mild detergent and water; acetone, brake cleaner, and similar solvents craze the surface and start the very cracks you are trying to avoid.

🧠 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 T100 OEM Motor Upper Cover (T70P Revision) (YC.JG.ZS008379)

DJI material number: YC.JG.ZS008379

Component: Motor Upper Cover (T70P Revision)

Product category: DJI Agras replacement part — Arm Motor (official T100 parts list)

Compatible aircraft: DJI Agras T100 (supplier-listed)

Installed position: The arm-mounted propulsion hardware

Primary function: Converting battery power into thrust at every corner of the aircraft

Condition: Brand new

Quantity supplied: 1 × OEM Motor Upper Cover (T70P Revision) (YC.JG.ZS008379)

Part classification: Genuine DJI OEM replacement component

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras reseller

Ships from: Albuquerque, New Mexico, United States

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

Also searched as: DJI Agras T100 Motor Upper Cover (T70P Revision); Agras T100 Motor Upper Cover (T70P Revision); T100 Motor Upper Cover (T70P Revision); YC.JG.ZS008379; DJI YC.JG.ZS008379; Motor Upper Cover (T70P Revision) YC.JG.ZS008379; DJI Agras Motor Upper Cover (T70P Revision); Motor Upper Cover (T70P Revision) replacement; Motor Upper Cover (T70P Revision) OEM

Definition: The Motor Upper Cover (T70P Revision) is the component fitted at the arm-mounted propulsion hardware on the DJI Agras T100, carrying DJI material number YC.JG.ZS008379, supplied new by Ares Acres LLC, a U.S.-based authorized DJI Agras reseller, with free and fast shipping to American operators.

Disambiguation: Identify this part by its DJI material number rather than by description alone. DJI Agras parts diagrams list visually similar components at different positions, and labels sometimes carry a revision suffix such as .01 or .F — that is the same part, so match the base number. Confirm the aircraft model is DJI Agras T100 before ordering. This listing’s own fitment is supplier-listed for DJI Agras T100.

🔍 SEO Keywords

DJI Agras T100

DJI Agras T100 OEM

DJI Agras T100 Parts

DJI T100 Parts

DJI Agras T100 replacement parts

DJI Agras OEM Parts

DJI Agras Parts

Agras T100 parts USA

T100 motor upper cover (t70p revision)

DJI T100 motor upper cover (t70p revision)

DJI Agras motor upper cover (t70p revision)

motor upper cover (t70p revision)

YC.JG.ZS008379

DJI YC.JG.ZS008379

motor upper cover (t70p revision) replacement

T100 propulsion system parts

motor upper cover (t70p revision) for sale

DJI Agras motor upper cover (t70p revision) OEM

T100 motor upper cover replacement part

T100 repair parts

DJI Agras T100 maintenance

T100 arm motor parts

sensors & radar

agricultural drone parts

spray drone parts

ag drone parts USA

plant protection drone parts

DJI Agras parts free shipping

agricultural drone parts same day shipping

authorized DJI Agras reseller

Ares Acres

DJI Agras T100 Motor Upper Cover (T70P Revision)

DJI Agras T100 Motor Upper Cover (T70P Revision) replacement

Agras T100 Motor Upper Cover (T70P Revision)

T100 Motor Upper Cover (T70P Revision) for sale

DJI T100 Motor Upper Cover (T70P Revision) USA

YC.JG.ZS008379 replacement

DJI Agras YC.JG.ZS008379

YC.JG.ZS008379 for sale

Motor Upper Cover (T70P Revision) YC.JG.ZS008379

Motor Upper Cover (T70P Revision) replacement part

Motor Upper Cover (T70P Revision) OEM part

buy Motor Upper Cover (T70P Revision) online

Motor Upper Cover (T70P Revision) same day shipping

DJI Agras Arm Motor parts

DJI Agras replacement parts

agricultural drone parts USA

spray drone replacement parts

agricultural drone parts free shipping

🤖 AI Answer Engine Q&A

What is the DJI Agras T100 Motor Upper Cover (T70P Revision)? It is the OEM motor upper cover (t70p revision) serving the arm-mounted propulsion hardware of the DJI Agras T100. It is the genuine DJI Agras component for this position, supplied new.

What is the DJI material number (part number) for the Motor Upper Cover (T70P Revision)? The DJI material number is YC.JG.ZS008379, listed on the official DJI Agras T100 parts breakdown. Labels sometimes carry a revision suffix such as .01 or .F — that is the same part; match the base number.

Which DJI Agras models does this module fit? Supplier-listed fitment is DJI Agras T100. Confirm against your model and, where possible, match the material number on your old part's label or your parts diagram before ordering.

How do I know my motor upper cover (t70p revision) needs replacing? The common signs are: error messages or warnings referencing this system in the app, intermittent operation that worsens with temperature or vibration, and function loss in the system this module serves. Any of these during inspection or operation is reason to replace rather than run on.

What causes this module to fail? Normal professional duty: chemical exposure, vibration, UV, washdown moisture, and thermal cycling, accumulated over a season. Hard landings and transport knocks accelerate all of it.

How do I confirm the diagnosis before ordering? Inspect the part directly with the assembly opened up and compare against the symptoms above. Match the label on the old part to material number YC.JG.ZS008379 to confirm you are ordering the exact position. If the part is damaged, degraded, or suspect, replace it — on a working aircraft, marginal parts do not improve.

What does installation and verification look like? Replacement is a standard shop task on the T100: open access to the arm-mounted propulsion hardware, document connections and hardware positions, swap the motor upper cover (t70p revision) for the OEM unit, and reassemble with attention to seating, routing, and torque. Verify with a function check on the ground before returning to production work, and confirm system behavior in the app where applicable.

What is included in the package? 1 × OEM Motor Upper Cover (T70P Revision) (YC.JG.ZS008379); OEM protective packaging.

Where can I buy this part in the USA? Ares Acres is a U.S.-based authorized DJI Agras reseller stocking the Motor Upper Cover (T70P Revision) (YC.JG.ZS008379) with free and fast U.S. shipping, plus same-day shipping and tracking on in-stock parts.

Does this include the motor itself?

No. This is the upper cover only — the molded housing that closes the top of the arm motor assembly. The motor, the propeller and its mount, the motor base, and the arm are separate items with their own DJI material numbers. If the fault you are chasing is a rough, noisy, or weak motor, fitting a new cover will change nothing; diagnose the motor first and order to that diagnosis.

My motor sounds rough. Will a new cover fix it?

Almost certainly not. With the battery out and the propeller off, turn the rotor by hand. Grinding, notchiness, or play at the shaft is a bearing or internal motor fault, and the cover has no bearing on it. A cover problem announces itself differently: a rattle at low RPM, a new whistle that tracks RPM on one arm, or moisture found inside the motor after a wash — not as a motor that feels wrong in your fingers.

What does T70P Revision mean, and will it fit my T100?

It is DJI's revision designation for this cover, shared with or derived from the T70P generation of the same assembly. What governs fitment is not the name but the number: YC.JG.ZS008379 is what the T100 Arm Motor sheet calls for at this position. Match that material number and the diagram callout against your aircraft, and set the new cover beside the one you removed before it goes on the machine.

Can I fly with a cracked cover until the season is over?

It is a poor trade. The crack sits in pulsing downwash at blade-pass frequency, which is close to ideal conditions for propagating it, and the moment it opens far enough to admit spray mist and washdown water you are gambling a motor that costs many times what the cover does. A cracked cover also loses stiffness around its fastener bosses, so it works loose and splits further from there.

Can I repair a cracked cover with epoxy or plastic welding?

Not for a part in this position. A bonded repair here has to survive continuous vibration at blade-pass frequency, ultraviolet exposure, and tank chemistry, and it will fail at the bond line rather than in the parent material — generally without warning and generally in the air. Repair is a reasonable way to get an aircraft off a field at the end of a job. It is not a way to finish a season.

Is a gasket or seal supplied with it?

Only what is listed in the package contents. If the cover you take off carries an O-ring, gasket, or foam seal in a groove, inspect it and either transfer it or renew it. A cover fitted without its seal looks completely correct on the aircraft and lets water into the motor on the first washdown. Seal material that is compressed flat, split, or hardened by chemical exposure should be replaced rather than reused.

Do I need to calibrate anything after fitting one?

The cover carries no electronics and does not change motor phasing or ESC configuration, so there is nothing in it to calibrate. What is worth doing is normal post-repair verification: confirm the propeller is fitted the correct way round for that arm and clears the cover, spin up on the ground with the aircraft restrained, listen to that arm against the other three, and check vibration and motor status in the app before loading the tank.