I. Core Specifications

Model: K1033657 (OEM Part Number)

Voltage: DC 12V or 24V (Adapted to specific machine models; 24V is most common)

Controlled Component: Glow Plug

Delay Time: Fixed 5–15 seconds (for cold-start preheating)

Contact Capacity: 10A/24VDC

Terminals: 4-pin waterproof connector (Power, Ground, Glow Output, Ignition Signal)

Construction: Black plastic housing, epoxy resin potted, vibration-resistant and waterproof

Temperature Range: -40°C to +85°C

Replacement Part Number: 537-00010 (Fully compatible and interchangeable)

II. Applicable Models (Doosan / Daewoo & Yanmar Engines)

Excavators: DH55, DH60-7, DH75, DH80G, DX27Z, DX30Z, DX55

Engines: Yanmar 4TNV88/94/98 Series (Primary power source for compact excavators)

III. Functionality (Single Function: Preheating Delay)

Ignition Key Turned to "ON": Automatically triggers power supply to the glow plug

Automatically cuts power after a delay of 5–15 seconds (to protect the glow plug)

Reduces white smoke and improves starting performance when the engine is cold; shortens preheating time when the engine is warm

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