HeavyEQ parts intelligence
Research first. Identify the installed component. Confirm the application.
Model discovery • Exact part fitment requires machine identification
Current North American 320 product page · United States / North American reference. Production-year bounds have not been established in this parts catalogue.
View the accepted equipment specifications →Published figures change with boom, arm, bucket, counterweight, undercarriage, guarding and regional emissions package. Match the serial number and build configuration before using a value for lift, attachment or transport planning.
Equipment-class discovery • Systems vary with configuration
Separate the carrier, upper structure, digging linkage and fitted work tool. A travel final drive, swing drive and auxiliary attachment circuit are different sourcing contexts.
Record boom/stick arrangement, track or wheel configuration, linkage position and the installed component plate. Ask whether a drive offer includes motor and reduction gearbox or only one of them.
A bucket or quick coupler has its own identity. Carrier model and digging dimensions do not establish tooth, coupler or breaker-service-part fitment.
Start with the manufacturer, model suffix and installed equipment. The following specialist subjects help describe a sourcing request; they do not identify a specific orderable part.
Record the installed assembly identification, its position and configuration. Ask the supplier which documentation connects the proposed replacement to that assembly.
Record the installed assembly identification, its position and configuration. Ask the supplier which documentation connects the proposed replacement to that assembly.
Record the installed assembly identification, its position and configuration. Ask the supplier which documentation connects the proposed replacement to that assembly.
Record the installed assembly identification, its position and configuration. Ask the supplier which documentation connects the proposed replacement to that assembly.
Record the installed assembly identification, its position and configuration. Ask the supplier which documentation connects the proposed replacement to that assembly.
For a used or rebuilt component, ask for its donor-unit provenance, inspection record, repair scope and any remaining identification marks. A donor model is context, not proof of fitment to another machine.
These are equipment-class discovery subjects. Confirm whether each is installed on the actual unit.
Engine family · build code · emissions generation
Engine/ECU calibration · pressure · connector · emissions
Engine emissions tier · aftertreatment arrangement · region
Engine option · physical envelope · fittings · fan drive
Circuit flow/pressure · mounting · serial range · porting
Drive architecture · gear ratio · installed assembly code
Track frame · pitch · links · shoe width · serial · variant
Tire/rim standard · bolt pattern · axle rating · configuration
Brake system · axle/configuration · rating · safety check
ECU software · harness revision · voltage · protocol · calibration
Cab generation · certifications · option packages
Dimensional fit · pin/bore · load · reinforcement revisions
Carrier & tool identity · mounting system · tooth series
Research Caterpillar source access, component identity and regional limitations →
Equipment specifications and generation evidence stay on the accepted model page. They are not proof that a specific replacement part fits.
Parts & maintenance
Use the accepted model identity to explore component families. Confirm the installed assembly, configuration and serial/PIN with the manufacturer before ordering.
Technical research & specification evidence
This guide retains the existing 320 identity. The current North American product page and its linked AEXQ3758-01 specification provide a reference configuration, rather than an as-built component list for a particular excavator. Keep earlier letter-series machines and the separately catalogued 320 GC outside this scope.
The linked specification separates main-system flow, travel pressure and swing pressure. Its implement-flow entry is a combined two-pump figure. The same document distinguishes boom, stick and bucket cylinders, and lists different reach arrangements and undercarriage builds. These are useful assembly boundaries; none identifies an installed pump, travel motor, seal kit or track-chain part number.
For a drive inquiry, specify whether the requirement is the hydraulic motor, reduction gearbox, brake-related components or an assembled unit. Ask for a photograph of each accessible identification plate and an explicit inclusion list. Retain the side and location with the evidence. A supplier description such as complete final drive should prompt clarification about what arrives assembled, which interfaces are included and what application evidence supports it. Do not treat that description as a manufacturer assembly number.
Use the published flow as machine-system context. A replacement-pump review still needs the installed tag, revision, mounting and connection evidence. Do not assign half the combined flow as a replacement-unit acceptance rating. For cylinders, start with the function and the actual boom/stick arrangement, then retain the stamped assembly identifier. The reference bore or stroke can help explain the document, but matching one dimension cannot resolve the gland, piston, rod end or seal arrangement.
The product page describes grease-lubricated tracks and sealed, rebuildable rollers. Its linked specification also separates standard and heavy-duty structures and roller arrangements. Record the fitted shoe and roller configuration before asking for chain, roller, idler or sprocket components. Keep condition observations and previous replacement invoices alongside identity evidence: a machine may carry an assembly installed after manufacture. A useful research result explains which document matches the configuration and which item remains unconfirmed; it does not substitute visible similarity for a parts-catalogue match.
Published values retain their exact reference scope. Empty fields mean the value has not been established; they never mean zero. General model associations do not establish installed or serial-specific fitment.
| Property | Value / status | Scope and interpretation |
|---|---|---|
| Main implement system maximum flow | 429 L/min | Reference: 07H North American linked technical reference; combined 214.5 × 2 pumps, not an individual pump rating Manufacturer published reference; not a HeavyEQ machine measurement 320 Hydraulic Excavator Technical Specifications — AEXQ3758-01 ↗ · AEXQ3758-01, printed p.2, Hydraulic System Actual installed component and serial-specific applicability unverified |
| Boom cylinder reference bore | 120 mm | Reference: Documented 320 reference cylinder; not a seal-kit selection dimension Manufacturer published reference; not a HeavyEQ machine measurement 320 Hydraulic Excavator Technical Specifications — AEXQ3758-01 ↗ · AEXQ3758-01, printed p.2, Hydraulic System Actual installed component and serial-specific applicability unverified |
| Boom cylinder reference stroke | 1260 mm | Reference: Same document scope; actual installed assembly and serial applicability unverified Manufacturer published reference; not a HeavyEQ machine measurement 320 Hydraulic Excavator Technical Specifications — AEXQ3758-01 ↗ · AEXQ3758-01, printed p.2, Hydraulic System Actual installed component and serial-specific applicability unverified |
Undercarriage features; Hydraulic System; linked 320 (07H) North American Technical Specifications
PUBLIC_REFERENCE_ONLY_NO_MEDIA_OR_TABLE_REPRODUCTION
Printed pp.2–4, Hydraulic System, Major Component Weights and Dimensions; linked from current product page
PUBLIC_REFERENCE_ONLY_NO_MEDIA_OR_TABLE_REPRODUCTION
Original HeavyEQ analysis and selected source facts. No catalogue reproduction licence, manufacturer endorsement or machine-specific compatibility is implied.
Model research context; installed assemblies not established
Keep the modern North American reference separate from 320B, 320C, 320D and suffixed historical machines. Combined implement-flow context does not identify a pump or a travel-drive ratio.
The reconciled investigations are: Travel final drives; main hydraulic pump; cylinders. These topics link the accepted equipment identity to technical vocabulary. They do not identify a manufacturer component as factory fitted or currently installed.
Keep the factory document and its revision separate from accessible current identification and repair history. Retain region, build and configuration evidence with each claim. A serial-based lookup may describe the original build while a later repair changes the installed assembly. No inferred year range or cross-generation application is added here.
The actual maker-coded assembly, revision, interfaces and scoped application documentation remain open for every listed investigation. Keep private serial/PIN details out of public text. Use the linked component authorities to record the missing evidence; a source-supported family rating is not a replacement specification for this machine.
Published values retain their exact reference scope. Empty fields mean the value has not been established; they never mean zero. General model associations do not establish installed or serial-specific fitment.
| Property | Value / status | Scope and interpretation |
|---|---|---|
| Travel final drives — installed assembly | Not yet documented | Complete installed identifier, revision and source-scoped application required; no maker/model inferred. |
| main hydraulic pump — installed assembly | Not yet documented | Complete installed identifier, revision and source-scoped application required; no maker/model inferred. |
| cylinders — installed assembly | Not yet documented | Complete installed identifier, revision and source-scoped application required; no maker/model inferred. |
Undercarriage features; Hydraulic System; linked 320 (07H) North American Technical Specifications
PUBLIC_REFERENCE_ONLY_NO_MEDIA_OR_TABLE_REPRODUCTION
Printed pp.2–4, Hydraulic System, Major Component Weights and Dimensions; linked from current product page
PUBLIC_REFERENCE_ONLY_NO_MEDIA_OR_TABLE_REPRODUCTION
Original HeavyEQ analysis and selected source facts. No catalogue reproduction licence, manufacturer endorsement or machine-specific compatibility is implied.
Original machine-model research; source-specific market and generation qualifiers retained; actual installation unknown
Use the existing model record to organize component research, retain qualified manufacturer observations and identify the evidence still needed for the actual installed equipment.
The reviewed first-party reference records Published engine designation: Cat C4.4; Published emissions context: U.S. EPA Tier 4 Final / EU Stage V / Japan 2014. Record the exact engine plate designation and its serial or build list separately from the machine PIN. Check whether the engine is original, a later service replacement or a rebuild with retained accessories. An emissions label and the machine brochure help identify the appropriate document set; neither identifies every internal or external engine part. No historical engine-generation list, installed build or service component fitment.
No new exact engine designation is accepted from the available current source text. Identify the installed injection equipment, controller and applicable emissions configuration before comparing fuel components. A general engine designation or a turbocharged-engine feature does not identify a pump, rail, injector, calibration or harness. High-pressure fuel work requires the applicable service information and competent inspection; this research supplies no pressure settings or repair instructions. Source does not establish exact320 injection-pump/rail/injector generation or service identity. No fuel pressure or repair claims.
The accepted HeavyEQ model identity remains Caterpillar 320, with generation recorded as Current North American 320 product page and regional context recorded as United States / North American reference. This identifies the research owner rather than every machine bearing the badge. Keep each cited source edition and its own market qualification beside the observation. A Canadian model table, a Tier 4 Final product guide or a current United States webpage must not be silently generalized into a worldwide specification. Historical revisions and dealer-installed or rebuilt equipment can require a different document set. Preserve discrepancies for review instead of choosing an apparently convenient number or suffix.
Record machine identity and component identity in separate private evidence records. Collect the applicable machine PIN information, a readable assembly tag, engine serial or build list where relevant, and evidence of what is currently installed. Check service history for replacement assemblies and retained accessories. Use those records to request the correct manufacturer application or service documentation. Share only the minimum necessary identifiers through an appropriate private process. The model context here does not certify an installation, authorize a substitution or identify a purchasable service part. No new exact assembly number, serial-specific fitment or supplier offer is established by this research.
Published values retain their exact reference scope. Empty fields mean the value has not been established; they never mean zero. General model associations do not establish installed or serial-specific fitment.
| Property | Value / status | Scope and interpretation |
|---|---|---|
| Published engine designation | Cat C4.4 | 320 current US product reference; excludes320GC,320GX andM320; historical generation/serial not verified Reference: 320 current US product reference; excludes320GC,320GX andM320; historical generation/serial not verified Rating basis: Manufacturer machine-model reference; no individual installed build accepted; condition: 320 current US product reference; excludes320GC,320GX andM320; historical generation/serial not verified Caterpillar 320 US current product reference ↗ · Product Specifications / Engine Model Current US page checked2026-10-15; source revision not shown |
| Published emissions context | U.S. EPA Tier 4 Final / EU Stage V / Japan 2014 | 320 named product reference; lists certification contexts, not actual imported-machine approval Reference: 320 named product reference; lists certification contexts, not actual imported-machine approval Rating basis: Manufacturer machine-model reference; no individual installed build accepted; condition: 320 named product reference; lists certification contexts, not actual imported-machine approval Caterpillar 320 US current product reference ↗ · Engine/emissions statement Current US page checked2026-10-15; source revision not shown |
| Actual installed assembly / build | Not yet documented | Machine-specific tag, current installed observation and applicable build evidence required |
| Serial-specific service-part fitment | Not yet documented | No verified serial application or exact component part accepted |
Engine Model and emissions statement; exact product320, not320GC/GX/M320
Limited original model-level factual reference only; no source-table, catalogue, imagery or serial application licence inferred
Original HeavyEQ analysis and selected source facts. No catalogue reproduction licence, manufacturer endorsement or machine-specific compatibility is implied.
United States / North American reference; Current North American 320 product page; contextual research only, no installed-component identification
Identify the Caterpillar 320 machine generation and the actual electrical assembly as separate research subjects. This investigation preserves the accepted model context and records what the available evidence can establish about vehicle or machine control unit vcu/ecm hardware, pressure transducers and switches.
Current 320 standard-equipment list includes Cat Grade with 2D; no replaceable machine controller or engine ECU identified. A machine controller is an identifiable hardware module operating within a particular software, parameter and harness configuration. Research those layers separately before evaluating a replacement. A familiar enclosure, product family or communication interface can help locate documentation, but it cannot establish the machine functions implemented by the offered unit or the approval needed to connect it to another installation. For Caterpillar 320, retain controller hardware part, firmware, machine application, calibration are separate as observed evidence rather than completing the record from a similar machine. Engine ECU assembly stays with 02B EN10; 02C owns general machine ECU/VCU identity and interface.
The exact model page publishes hydraulic-system information. That is not an individual transducer range, pressure reference, output scaling or installed identity. A hydraulic pressure sensor connects a physical measurement to an electronic interpretation. Its thread and connector identify only part of that interface. A useful research record keeps the pressure reference, measurement range, transfer characteristic and exact assembly identity separate, so a similar-looking transmitter does not become an unsupported replacement claim. For Caterpillar 320, retain gauge vs absolute vs differential and signal curve as observed evidence rather than completing the record from a similar machine. Similar thread, range or connector does not verify accuracy or machine fit.
Caterpillar 320 retains its existing canonical research owner. The investigation concerns vehicle or machine control unit vcu/ecm hardware, pressure transducers and switches. Read the source in its stated market and generation; a currently advertised feature can describe an option, a package or a later configuration. Record the issuer and complete designation on the actual assembly separately from the machine name. A housing mark, a general technology label and an orderable service identity answer different questions. Missing identifiers stay unknown. A prior repair or assembly replacement can also make the original build information insufficient to identify what is present now.
Use the existing equipment specifications for the retained model and generation. A general model association supplies discovery context; it does not prove the particular controller, sensor, harness or operator device installed on an individual machine. A qualified review should connect the actual hardware revision, harness and connector configuration, signal interpretation and applicable application or calibration evidence. Keep full PIN/serial identifiers, software credentials and service access private. Neither the absence of a fault nor a matching supply voltage establishes interchangeability. This page does not provide energized tests, wiring adaptation, programming steps or a replacement approval. The linked component research explains which evidence belongs in each part of that review.
Published values retain their exact reference scope. Empty fields mean the value has not been established; they never mean zero. General model associations do not establish installed or serial-specific fitment.
| Property | Value / status | Scope and interpretation |
|---|---|---|
| Exact installed electrical component | Unverified | No actual assembly identification has been established for this machine. |
| Hardware, application and serial-specific compatibility | Unverified | Requires the actual assembly, configuration and qualified machine evidence. |
Standard Cat Technology list / Cat Grade with2D; no physical controller code
Limited factual reference and original commentary only; no catalogue reproduction or installed-fitment permission
Original HeavyEQ analysis and selected source facts. No catalogue reproduction licence, manufacturer endorsement or machine-specific compatibility is implied.