| Technical Feature / Attribute | Product Specification Details |
| Brand / Manufacturer | COGENG |
| Part Number (MPN) | 0004307 |
| Product Category | Main Frame & Engine Control Wiring Harness Assembly |
| Primary Machine Application | Hitachi ZX330-3G, ZX350-3G, ZX330, ZX350 Hydraulic Excavators |
| Series Generation | Dash-3 / Dash-3G ZAXIS Series (-3 / -3G Architecture) |
| Condition | 100% Brand New, Direct OEM Spec Aftermarket Replacement |
| Conductor Core Material | High-Conductivity Electrolytic Annealed Copper (Multi-Strand) |
| Insulation & Outer Armor | Flame-retardant cross-linked polyethylene (XLPE) with corrugated split 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 0004307 Wiring Harness is a heavy-duty main frame and engine control electrical assembly engineered specifically for Hitachi ZX330-3G, ZX350-3G, and related ZAXIS -3 series hydraulic excavators. Operating within high-output heavy machinery, this harness acts as the central electronic network connecting the engine control unit (ECU), common rail fuel system components, hydraulic pump controllers, and operator cabin interfaces.
Heavy earthmoving and mining applications subject excavators like the ZX330-3G and ZX350-3G to severe mechanical vibration, high engine bay temperatures, moisture, and aggressive exposure to industrial fluids such as diesel fuel and hydraulic oil. Over time, factory wiring insulation becomes brittle, resulting in internal conductor fatigue, micro-cracks, and voltage drops. Common failure symptoms include intermittent sensor fault codes, electronic fuel injection misfires, hydraulic pump response lag, or unexpected equipment shutdowns.
The COGENG 0004307 is manufactured as a direct plug-and-play OEM-spec replacement. Built using high-grade multi-strand copper wiring, flame-retardant protective jacketing, and heavy-duty waterproof connectors, this assembly restores signal clarity, protects sensitive control computers from short-circuit spikes, and ensures optimal performance and reliability on the job site.
Main Chassis & Engine Cable Trunk: Heavy-gauge electrolytic copper wiring designed for main power distribution, ground loops, and primary frame routing.
Hydraulic Pump & Valve Control Branch: Pre-terminated leads featuring heavy-duty waterproof plugs for main hydraulic pump proportional valves, pressure transducers, and pilot cut-off solenoids.
Engine Bay Sensor & Injector Branch: Factory-configured plugs for common rail system sensors, oil pressure switches, coolant temperature senders, fuel shutoff solenoids, alternator charging terminals, and starter relay triggers.
Cab & Main Controller Interconnect Interface: High-density multi-pin OEM-style plugs configured to mate directly into the cabin wiring harness and central controller boxes.
IP67 Waterproof Sealed Connectors: Robust Deutsch/Sumitomo-style connector plugs equipped with internal silicone seals and locking latches to block out water, dirt, and mud.
Protective Outer Armor & Mounting Hardware: Abrasion-resistant corrugated split tubing, heat-shrink reinforced branch junctions, and pre-installed rubber grommets and chassis mounting clips.
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COGENG 0004307 WIRING HARNESS ARCHITECTURE
========================================================================================
[ Cab Harness Junction & ECU/Controller Interface ]
|
|-- Central Power & Relay Feeds
|-- Monitor Panel & Throttle Control
|
+-----------------+-----------------+
| |
[ Engine Bay Branch Trunk ] [ Hydraulic Pump & Frame Trunk ]
| |
+--------------+--------------+ +--------------+--------------+
| | | |
(Engine Sensors) (Starter & Alt) (Main Pump Solenoids) (Pressure Transducers)
- Oil Pressure Switch - Starter B+ - Proportional Valve - Main Delivery Sensor
- Water Temp Sender - Alternator D+ - Speed Control Sol. - Pilot Cutoff Solenoid
- Fuel Shutoff Solenoid - Chassis Ground - Angle Sensors - Travel / Swing Horn
Hitachi ZX330-3G / ZAX330-3G
Hitachi ZX350-3G / ZAX350-3G
Hitachi ZX330 / ZAX330 (-3 Series)
Hitachi ZX350 / ZAX350 (-3 Series)
Dash-3 / -3G Generation Specification: The 0004307 harness is specifically tailored for Dash-3 and Dash-3G generation Hitachi ZAXIS architecture. It is not compatible with older Dash-1/2 or newer Dash-5 series models due to differences in controller pinouts and connector configurations.
Serial Number Verification: Mid-production running changes by Hitachi can sometimes alter harness routing or plug configurations. Always cross-reference your machine serial number and original part number with our technical team prior to ordering.
Circuit Safety Check: Before installing the new harness, ensure the main battery isolator is turned off and verify that external electrical short circuits (such as a shorted solenoid coil or damaged sensor) are cleared to protect the new wiring assembly.
+---------------------------------------------------------------------------------------+
| INSTALLATION WORKFLOW STEPS |
+---------------------------------------------------------------------------------------+
| [STEP 1: DISCONNECT POWER] ---> Shut off main battery isolator & disconnect (-) |
| terminal to eliminate risk of electrical short. |
+---------------------------------------------------------------------------------------+
| [STEP 2: LABEL & REMOVE] ---> Tag all existing connections on engine and pump, |
| unbolt chassis clamps, and extract old harness. |
+---------------------------------------------------------------------------------------+
| [STEP 3: BENCH COMPARISON] ---> Lay out old harness beside COGENG 0004307 to verify |
| branch lengths, pin count, and connector profiles. |
+---------------------------------------------------------------------------------------+
| [STEP 4: ROUTE & SECURE] ---> Route new harness along factory 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, turn ignition key to ON position,|
| check monitor status, and perform operational test. |
+---------------------------------------------------------------------------------------+
| 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: Does this harness fit both Hitachi ZX330-3G and ZX350-3G models?
A: Yes, the COGENG 0004307 is designed for direct compatibility across ZX330-3G and ZX350-3G excavators sharing the same main frame and engine electrical architecture.
Q2: Are all branch connectors weatherproof?
A: Yes, all external connection points feature heavy-duty IP67/IP68 rubber-sealed plugs designed to resist moisture, dirt, and oil contamination.
Q3: Can I request pre-shipment photos of the harness?
A: Yes! Pre-shipment photos and testing verification videos can be provided upon request prior to dispatch to confirm part numbers and connector layouts.
*shipping Details Return Sales*
Sales price:
Please contact COGENG sales customer service for specific prices.
Shipping method:
The specific arrangement will be based on the cargo situation.
Estimated delivery time:
It is based on the shipping time of the logistics company, and the arrival time shown shall prevail.
Contact details are at the bottom.
MerchantReturnPolicy:
The products shipped are not returnable or exchangeable.
Contact COGENG
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