ZF 6073.015.519 EST 37 A for WG190 | OEM Genuine Part

Overview

The ZF 6073.015.519 EST 37 A for WG190 is an OEM genuine electronic control unit (ECU) or solenoid valve assembly that governs hydraulic pressure modulation within the transmission. Positioned on the valve body of the WG 190 series, this component translates driver commands and sensor inputs into precise clutch and brake engagements. The SKU 6073.015.519 is a direct replacement for the original factory unit, ensuring exact electro-hydraulic response. When paired with a robust TRANSMISSION HOUSING, this part maintains consistent oil flow to the clutch packs.

Symptoms of Failure

• Erratic or delayed gear engagement: A failing EST 37 A can cause harsh shifts or a noticeable lag when moving from Neutral to Drive, often accompanied by a temporary loss of hydraulic pressure.
• Intermittent transmission slipping: Worn internal solenoids may allow the transmission to slip under load, particularly during uphill climbs or heavy towing, as the valve body fails to hold line pressure.
• Oil contamination or debris in the pan: Internal seal degradation within the unit can introduce metallic particles into the fluid, leading to clogged passages and reduced lubrication to the HOUS.FRONT SECT.
• Diagnostic trouble codes (DTCs) for pressure control: The transmission control module will log codes related to solenoid circuit malfunctions, often triggering a limp-home mode that limits speed to 30 mph.

Technical Specifications

Compatibility

This OEM genuine part is engineered for the ZF WG 190 series, but it also fits select variants of the WG 180 and WG 200 transmissions where the valve body layout matches the EST 37 A footprint. It is commonly used in off-highway vehicles, municipal trucks, and heavy-duty construction equipment. For proper installation, ensure the HOUSING REAR PART and HOUSING REAR SECTION are free of cracks or warpage, as misalignment can damage the solenoid pins.

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