| Technical Feature / Attribute | Product Specification Details |
| Brand / Manufacturer | COGENG |
| Part Number (MPN) | 0003779 |
| Product Category | Main Frame & Pump/Engine Control Wiring Harness Assembly |
| Primary Machine Application | Hitachi EX200-5 & Hitachi EX220-5 Hydraulic Excavators |
| Series Generation | Dash-5 Series (EX200-5, EX220-5, EX200LC-5, EX220LC-5) |
| 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 0003779 Wiring Harness is a heavy-duty main frame and pump/engine control electrical wire assembly engineered specifically for Hitachi EX200-5 and EX220-5 hydraulic excavators. Operating within the Dash-5 series machine architecture, this harness acts as the primary transmission network linking the operator cabin controller, electronic pump control (PVC/ECU) units, engine sensors, hydraulic main pump solenoids, and proportional control valves.
In rigorous earthmoving, utility, and construction environments, legacy machines like the EX200-5 and EX220-5 are subjected to intense engine heat, persistent chassis vibration, moisture, and chemical exposure from hydraulic oil and diesel. Over time, factory wiring insulation becomes brittle, leading to micro-cracks, internal wire corrosion, and voltage drop. Common symptoms of a failing wiring harness include hydraulic pump lag, intermittent sensor fault codes, throttle control errors, engine starting failure, or sudden machine shutdown.
The COGENG 0003779 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 hydraulic efficiency on the job site.
Main External Chassis Cable Trunk: Thick-gauge electrolytic copper wiring designed for main power distribution, ground circuits, and primary frame routing.
Hydraulic Pump & Valve Control Branch: Pre-terminated leads featuring heavy-duty waterproof plugs for main hydraulic pump proportional valves, pump displacement sensors, and pilot cut-off solenoids.
Engine Bay Sensor & Control Branch: Factory-configured plugs for engine 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 0003779 WIRING HARNESS ARCHITECTURE
========================================================================================
[ Cab Harness Junction & ECU/PVC 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 EX200-5
Hitachi EX220-5
Hitachi EX200LC-5
Hitachi EX220LC-5
Hitachi EX200-5 Super Series
Dash-5 Series Specification: The 0003779 harness is specifically tailored for the Dash-5 generation (-5 series) Hitachi architecture. It is not compatible with Dash-2 or Dash-3 series models due to differences in controller pinouts and solenoid connector styles.
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) 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 0003779 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 EX200-5 and EX220-5 models?
A: Yes, the COGENG 0003779 is designed for direct compatibility across EX200-5 and EX220-5 Dash-5 series excavators sharing the same main frame electrical layout.
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.
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 country.
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 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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