4436534 Excavator Wire Harness Relay for ZX200

The part number 4436534 you inquired about is the original wiring harness relay provided by Hitachi for the ZX200 series (including ZX200-3, ZX200-5G, etc.) hydraulic excavator. Universal model 156700-2190. This relay is usually integrated into the vehicle's electrical control box, used to control the on/off of high current loads such as headlights, fans, wipers, glow plugs, or fuel pumps. As a control switch designated by the original factory, its load capacity, coil resistance, and response time are precisely matched with the vehicle circuit design

This product is a single contact normally open plug-in relay with a square plastic housing, usually black, blue or green, and has excellent flame retardancy and sealing properties. The bottom has standard multi pin metal pins for inserting into the relay socket. Its core consists of a coil, iron core, armature, and silver alloy contacts. The working voltage is 24V DC, which is compatible with the onboard circuit system. The contact load capacity is usually between 20A and 40A, which is sufficient to drive various vehicle mounted electrical appliances. Original parts ensure their long-term reliability and longevity under severe vibrations, high and low temperatures (-40 ℃ to 85 ℃), and humid environments, serving as the "automatic switch" to ensure the stable operation of the electrical system.

Fault diagnosis: If a certain electrical function (such as headlights) completely fails, it can be attempted to swap and test with adjacent relays of the same specification. If the fault is transferred, it proves that the original relay is damaged. A multimeter can also be used to measure the resistance of the coil pins (usually tens to hundreds of ohms). If it is infinite, the coil will break. Precautions: Pay attention to anti-static measures during operation; Be sure to plug it in place to prevent overheating caused by poor contact; Moisture proof and pin protection are required during storage.