| Technical Feature / Attribute | Product Specification Details |
| Brand / Manufacturer | COGENG |
| Part Number (MPN) | 0003303 |
| Product Category | Main Frame & Pump/Engine Control Wiring Harness Assembly |
| Primary Machine Application | Hitachi EX400-5 & Hitachi EX450LC-5 Hydraulic Excavators |
| Cross-Compatibility | Hitachi EX400-5 Super / EX450-5 Series |
| Condition | 100% Brand New, Direct OEM Spec Aftermarket Replacement |
| Conductor Core Material | High-Conductivity Electrolytic Annealed Copper (Multi-Strand) |
| Insulation & Protection Layer | High-temperature cross-linked polyethylene (XLPE) with flame-retardant corrugated loom & nylon braiding |
| Connector & Plug Types | Heavy-duty, IP67/IP68 waterproof and dustproof sealed multi-pin connectors |
| Operating Voltage | 24V DC Heavy Machinery Electrical System |
| Operational Temperature | -40°C to +125°C (-40°F to +257°F) continuous thermal tolerance |
| Quality Control & Testing | 100% Automated Continuity, Resistance, and Thermal Burn-in Bench Tested |
The COGENG 0003303 Wiring Harness is a heavy-duty main frame and pump/engine control electrical wire assembly engineered specifically for Hitachi EX400-5 and EX450LC-5 hydraulic excavators. Designed for heavy earthmoving, demolition, and large-scale mining operations, the -5 generation Hitachi excavators rely heavily on precise electrical signal transmission to coordinate hydraulic pump delivery, engine throttle control, and real-time monitoring via the main controller (ECU/PVC).
Operating under extreme job site conditions exposes factory electrical harnesses to intense engine heat, severe chassis vibration, continuous mechanical friction, and aggressive industrial fluids like hydraulic oil, diesel fuel, and grease. Over time, original wiring suffers from copper wire fatigue, brittle insulation cracking, and connector oxidation. These issues lead to severe operational symptoms, including electronic pump control lag, sudden engine stalling, false diagnostic codes, loss of monitor function, and unpredictable machine downtime.
The COGENG 0003303 wiring harness is manufactured as a direct plug-and-play replacement matching or exceeding original factory specifications. Built with high-grade copper core cabling, robust heat-resistant insulation, and factory-matched waterproof sealed connectors, this harness restores clean power and signal distribution across all primary hydraulic and engine control circuits. Upgrading to the COGENG 0003303 ensures consistent machine performance, protects expensive central electronic units from short circuit damage, and maximizes equipment uptime on demanding job sites.
Main Chassis Trunk Cable: Heavy-gauge multi-strand copper wiring engineered for main power distribution and primary frame grounding circuits.
Hydraulic Pump & Solenoid Control Branch: Includes pre-terminated leads and waterproof plugs for hydraulic main pump solenoids, proportional pressure valves, and pump displacement transducers.
Engine Bay Interface Branch: Dedicated leads for coolant temperature senders, engine oil pressure switches, throttle actuator controls, alternator charging, and starter relay triggers.
Cabin & Controller Interconnect Plugs: High-density, multi-pin factory connectors engineered to mate directly with the main operator cabin harness and ECU controller box.
Waterproof Sealed Connectors: Heavy-duty Deutsch/Sumitomo-style connector plugs equipped with internal rubber seals and locking latches to block out dirt, mud, and moisture.
Protective Outer Armor & Hardware: Flame-retardant corrugated split tubing, heat-shrink reinforcement at branch splits, and factory-positioned mounting grommets and clamps.
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COGENG 0003303 WIRING HARNESS ARCHITECTURE
========================================================================================
[ Cab Harness Junction & ECU/PVC Controller Port ]
|
|-- Main Power & Central Relay Feeds
|-- Monitor & Throttle Interface
|
+-----------------+-----------------+
| |
[ Engine Bay Branch Trunk ] [ Hydraulic Pump & Frame Trunk ]
| |
+--------------+--------------+ +--------------+--------------+
| | | |
(Engine Sensors) (Starter & Alt) (Main Pump Solenoids) (Pressure Transducers)
- Oil Pressure Switch - Starter B+ - Proportional Valve - Pump Delivery Sensor
- Water Temp Sender - Alternator D+ - Speed Control Sol. - Pilot Cutoff Solenoid
- Fuel Shutoff Solenoid - Earth Ground - Angle Sensors - Travel / Swing Alarm
Hitachi EX400-5
Hitachi EX450LC-5
Hitachi EX400-5 Super Series
Hitachi EX450-5
Generation Specificity (-5 Series): The 0003303 harness is tailored specifically for Dash-5 generation EX400 and EX450LC excavators. It is not interchangeable with Dash-2 or Dash-3 series harnesses due to changes in controller pinouts and valve solenoid connectors.
Serial Number Verification: Heavy equipment manufacturers occasionally update wire loom paths or connector shapes mid-production. Always verify your machine serial number and original part number prior to ordering.
Electrical System Pre-Check: Before installing the new harness, ensure the battery disconnect switch is isolated and check existing components for severe electrical shorts that may have damaged the original harness.
+---------------------------------------------------------------------------------------+
| INSTALLATION WORKFLOW STEPS |
+---------------------------------------------------------------------------------------+
| [STEP 1: DISCONNECT POWER] ---> Turn off main battery isolator & disconnect (-) |
| terminal to eliminate risk of electrical short. |
+---------------------------------------------------------------------------------------+
| [STEP 2: LABEL & REMOVE] ---> Mark existing connector locations on engine/pump, |
| unbolt chassis clamps, and extract old harness. |
+---------------------------------------------------------------------------------------+
| [STEP 3: BENCH COMPARISON] ---> Lay out old harness beside COGENG 0003303 to verify |
| branch lengths, pin placement, and plug styles. |
+---------------------------------------------------------------------------------------+
| [STEP 4: ROUTE & SECURE] ---> Route new harness through OEM chassis channels; |
| seat rubber grommets firmly in frame pass-throughs. |
+---------------------------------------------------------------------------------------+
| [STEP 5: PLUG & CLICK] ---> Connect engine sensors, hydraulic solenoids, and |
| ECU connectors until locking tabs click tightly. |
+---------------------------------------------------------------------------------------+
| [STEP 6: SYSTEM TEST] ---> Reconnect battery, switch key to ON position, |
| verify monitor status, and perform test run. |
+---------------------------------------------------------------------------------------+
| Detail | Description |
| Shipping Methods | By Air, By Sea, By Express (FedEx, UPS, DHL, TNT, etc.). The specific arrangement will be based on the cargo situation and destination. |
| Estimated Delivery Time | Based on the shipping time of the logistics company. The arrival time shown by the carrier's tracking system shall prevail. |
| Packing | Inner: PP bag. Outer: Export-grade carton box with protective foam. |
| Payment Terms | Western Union, L/C (Letter of Credit), T/T (Telegraphic Transfer), MoneyGram, D/A (Documents against Acceptance), D/P (Documents against Payment) |
| Policy Point | Terms |
| Merchant Return Policy | Products shipped are not returnable or exchangeable. |
| Quality Guarantee | Every board and harness is function-tested and burned-in before shipment to ensure it is not Dead on Arrival (DOA). |
| Pre-Shipment Confirmation | Photos and testing videos can be provided upon request before shipment to confirm correct part numbers and operational condition. |
Q1: Will this wiring harness fit both Hitachi EX400-5 and EX450LC-5?
A: Yes, the COGENG 0003303 is designed for direct compatibility with both EX400-5 and EX450LC-5 models sharing the Dash-5 electrical architecture.
Q2: Are the connector plugs waterproof and dustproof?
A: Yes, all branch connectors are built to heavy-duty IP67/IP68 standards with internal rubber weather seals to withstand harsh construction conditions.
Q3: Can I receive visual verification of the part before shipping?
A: Yes, photos and testing videos can be provided upon request prior to dispatch to verify part numbers and connector layout.
Sales Price: Please contact COGENG sales customer service for specific prices and wholesale bulk discounts.
Shipping Method: The specific arrangement will be based on the cargo situation, parcel weight, and destination.
Estimated Delivery Time: It is based on the shipping time of the logistics company, and the arrival time shown by the carrier's tracking system shall prevail.
Merchant Return Policy: The products shipped are not returnable or exchangeable. Please verify your part numbers carefully before ordering.
For pricing, bulk orders, or technical support, contact your COGENG supplier today.
Please provide your machine model and serial number for compatibility verification.
✅ Direct OEM Replacement.
✅ Durable — Built for Job Site Conditions.
✅ In Stock — Fast Shipping Worldwide.
Contact COGENG
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