M939 Truck
Enable an AI agent to identify an M939-family truck configuration, assess its documented condition and determine which transport, support or maintenance actions its equipment and limits permit.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 18 findings · 28 questions
Family and variant identity Establish how a truck belongs to the M939 family and which configuration governs its assessment.
Designation evidence
Connect the reported family name to a complete, evidenced designation.
Verified family membership
Record the full designation and supporting identification evidence, preserving uncertainty when records and observations disagree.
- What full model designation and series suffix appear on the truck's identification evidence? definition
- Which plate, serial record or authoritative equipment reference corroborates M939-family membership? provenance
Configuration divergence
Distinguish original variant identity from subsequent equipment changes.
Documented installed configuration
Identify body, powertrain and running-gear changes that affect which variant instructions remain applicable.
- Which installed components or body features differ from the documented variant configuration? boundary
- What modification records establish the compatibility and revised limits of those changes? provenance
Powertrain and ground mobility Represent the installed diesel propulsion system and the configuration that transfers power to the ground.
Propulsion and drive controls
Identify propulsion components and the states governing vehicle movement.
Matched powertrain instructions
Link installed engine, transmission and transfer-case identities to their approved fuels, fluids, controls and operating limits.
- Which engine, transmission and transfer case are installed, and which technical instructions cover that combination? provenance
- Which selected drive states, indications or faults constrain movement under those instructions? action
Tires and terrain settings
Connect axle tire fitment and inflation equipment to the intended surface and load.
Verified tire operating envelope
Record tire specification, condition, pressure and any installed central tire inflation system without assuming equipment from the family name.
- What tire sizes, axle arrangements, measured pressures and inflation equipment are present? measurement
- Which documented pressure and speed limits apply to this tire configuration, load and terrain? action
Mission body and load envelope Describe what the actual M939 variant can carry, couple to or support.
Body and attachment capability
Identify the fitted mission body and usable task interfaces.
Equipment-dependent affordances
Associate capabilities only with verified equipment, including coupling, dumping, lifting or winching equipment where fitted.
- Which mission body, couplings and powered attachments are actually installed? definition
- Which requested actions are supported by their documented ratings and present condition? action
Mass and clearance limits
Assess loading and physical fit in the configuration proposed for use.
Configuration-specific load assessment
Compare measured or substantiated loading and dimensions with variant-specific limits, distinguishing travel and deployed states.
- What are the actual gross mass, axle loads, relevant coupling loads and travel dimensions? measurement
- Which documented limits apply to the proposed road, cross-country, towing or deployed operation? boundary
Movement and equipment safety Assess whether the truck and its mission equipment meet applicable conditions for the next action.
Braking and directional control
Assess brakes, steering and relevant warnings against the installed system's instructions.
Movement readiness evidence
Record applicable brake and steering inspection results, including any installed brake-control modifications.
- Which brake-system configuration and modifications are installed, and what evidence verifies them? provenance
- Do applicable checks identify a defect or warning that prohibits or restricts movement? action
Stability and equipment securing
Account for load placement, body position and equipment restraints before travel or deployment.
Safe body state
Record body-specific securing devices, supports and interlocks where fitted, and distinguish verified engagement from assumed protection.
- What are the positions and verified states of applicable body locks, restraints, supports and interlocks? measurement
- Do load placement, slope and equipment deployment satisfy the applicable stability and securing requirements? action
Serviceability and applicable authority Connect inspection findings and service requirements to the correct M939 technical references.
Inspection and consumables
Record preventive checks, defects and component-specific service needs.
Configuration-matched maintenance
Organize inspection evidence and service requirements around installed components, including leaks, tire damage, corrosion and attachment faults as assessment categories rather than claimed failure frequencies.
- Which inspections or services are due, and which unresolved findings affect the requested operation? action
- Which fuel, lubricant, coolant, filter and replacement-part specifications apply to the installed components? provenance
Technical and use authority
Separate technical serviceability evidence from authorization for a particular operating context.
Traceable operating basis
Record issuing body, edition and applicability of technical instructions, plus relevant use restrictions; military identification alone does not establish civilian road approval.
- Which Army or Air Force manual editions, changes and modification instructions govern this configuration? provenance
- What additional inspection or authorization evidence is required for the proposed jurisdiction and use? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these kinds and varieties hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of M939 Truck this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
What it is Filled
The M939 is a family of U.S. military diesel-powered, three-axle, six-wheel-drive trucks in the 5-short-ton payload class, produced in cargo, dump, tractor, wrecker and other configurations.
In scope
- Family membership, complete variant designation and configuration evidence
- Installed powertrain, running gear, controls and operating states
- Mission body, attachments, load limits and transport envelope
- Configuration-specific inspection, maintenance and serviceability
- Applicable technical instructions, modifications and operating restrictions
Out of scope
- Generic truck principles already owned by a broader vehicle model
- Separate models for each serialized truck or every family variant
- Cargo contents, passenger identities and transport mission planning
- Independent models of trailers, engines and recovery equipment
- Fleet ownership, procurement history and driver qualification records
Why it exists Filled
Enable an AI agent to identify an M939-family truck configuration, assess its documented condition and determine which transport, support or maintenance actions its equipment and limits permit.
Distinguishing features Filled
- Require a complete vehicle designation and corroborating identification evidence; a military appearance or 5-ton label alone cannot distinguish the M939 family from other truck families.
- Check documented membership in the M939, M939A1 or M939A2 series of 5-ton, 6x6 diesel trucks. These series are explicitly covered by [Army/Air Force TM 9-2320-272-10](https://www.nsndepot.com/Library/TM/TM-9-2320-272-10).
- Distinguish the family name from mission designations: the operator manual includes cargo, dump, tractor, expansible-van and medium-wrecker variants. Verify the actual body against the full designation using [TM 9-2320-272-10](https://www.nsndepot.com/Library/TM/TM-9-2320-272-10).
- Use installed engine, transmission, wheel arrangement and tire-inflation equipment to corroborate the declared series; conflicting components require modification evidence rather than automatic reclassification.
What robots and AI may and may not do Filled
Must not
- Drive or move a truck without an authorised, licensed driver in control.
- Operate one on public roads without the registration and inspection the law requires.
- Remove or bypass braking or stability modifications.
- Assist in using it to carry weapons or for attacks.
Only with a human decision
- Any decision to drive on public roads or carry passengers in the cargo bed.
May
- Describe the truck family, its variants and service history.
- Check a surplus truck's registration and inspection status for its civilian owner.
Moral aspects Filled
- Ex-military trucks in civilian hands can be dangerous if their known handling issues are ignored.
Who is affected
- Drivers and passengers
- Other road users
- Service members
Owners Filled
Steward
The armed forces or registered civilian keeper; vehicle registers record surplus trucks in civilian use.
Master systems
- National vehicle registers
Links to other meta-models Filled
parent
- Q3755996 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.m939-truck
- Wikidata: Q238576 (https://www.wikidata.org/wiki/Q238576)
Direct properties required Filled
- Complete variant designation: Full military model designation, including A1 or A2 suffix where applicable; unknown
- Configuration evidence: Identification plate, serial record, equipment inspection and modification documentation
- Mission body: Cargo; dump; tractor; expansible van; medium wrecker; documented conversion; unknown
- Installed powertrain: Engine, transmission and transfer-case identities linked to applicable specifications
- Tire and inflation configuration: Tire size, axle fitment and inflation-system presence and type
- Permitted and actual loading: kg for payload, gross mass, axle loads and relevant coupling loads, with operating conditions
- Travel and deployed envelope: m for length, width, height, wheelbase and deployed clearances
- Brake-system readiness: Verified serviceable; restricted; unserviceable; unverified, with pressure readings in kPa where applicable
- Mission-equipment readiness: Stowed; deployed; operating; isolated; defective; absent; unknown
- Maintenance applicability: Technical manual edition, change level, applicable service instructions and inspection records
Recognition required Filled
- A large three-axle truck with a flat-fronted cab and a squared bonnet.
- Six large off-road tyres and military drab paint, often with stencilled unit markings.
Capabilities and actions required Filled
- Resolve a reported M939 truck to a documented family variant and flag conflicting identification evidence.
- Compare a proposed load and route with the truck's verified configuration and operating limits.
- Determine whether the installed body and attachments support a requested cargo, towing or support task.
- Assess movement and equipment-use readiness from applicable inspections and unresolved defects.
- Select configuration-matched maintenance references and consumables.
- Identify missing evidence that prevents a defensible operating decision.
Hazards and failure modes required Filled
- The series became known for rollover accidents, which led to braking modifications.
- Heavy weight and high centre of gravity make sharp manoeuvres dangerous.
Standards and interfaces required Filled
- Federal Supply Class 2320, issued within the United States Department of Defense Federal Supply Classification system, covers wheeled trucks and truck tractors of this family.
Context of use required Filled
- These military trucks are used for transporting personnel, cargo and equipment in logistics operations.
- Different configurations support hauling, towing, recovery and other transport support roles on roads and rough terrain.
Sources Filled
- Wikidata item Q238576: M939 Truck - identity and sense of the item
- Wikipedia: M939 series 5-ton 6×6 truck - general description of the item
Open questions
- Does the registry intend the complete M939 family or only the unsuffixed series, and does an existing Vercy world model already own that concept?
- What authoritative configuration matrix establishes engine, transmission, tire and central tire inflation differences across the series and documented modifications?
- What verified payload, axle, towing, dimensional and terrain limits apply to each included mission variant and operating configuration?
- Which brake-system updates, safety notices and body-specific interlocks apply to the vehicles being assessed, and what evidence verifies installation?
- Which technical publication revisions and jurisdiction-specific operating requirements govern the intended users' trucks?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q238576/spec.json