Overview
The ZF 6073.015.544 EST 37 A for WG210 is a precision-engineered solenoid valve assembly that regulates hydraulic pressure within the transmission control unit. Positioned within the valve body of the WG 210 series, this OEM genuine part modulates clutch and brake application for smooth gear shifts under load. The SKU 6073.015.544 is a direct replacement for failed units, ensuring that the transmission’s electronic-hydraulic interface maintains correct shift timing and torque converter lockup. Without this component, the transmission cannot execute commands from the ECU, leading to erratic performance or total loss of drive.
Symptoms of Failure
- Delayed or harsh shifting – When the EST 37 A solenoid wears, hydraulic pressure drops, causing noticeable lag between gear changes or jarring engagement. This often triggers a “transmission slipping” warning on the dash.
- Intermittent loss of forward or reverse gears – A failing solenoid may stick open or closed, resulting in sudden neutral conditions during operation, particularly in stop-and-go traffic.
- Transmission fluid contamination – Internal wear of the solenoid plunger can introduce metallic debris into the oil, leading to clogged filter screens and accelerated damage to adjacent components like the TRANSMISSION HOUSING.
- Check engine light with shift solenoid codes – Diagnostic trouble codes (e.g., P0748, P0753) will appear, indicating electrical or hydraulic faults in the solenoid circuit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 6073.015.544 |
| OEM Reference | EST 37 A for WG210 |
| Material | Hardened steel spool with anodized aluminum body |
| Weight | 0.45 kg (1.0 lb) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 40 mm |
| Operating Pressure | 8–22 bar |
| Coil Resistance | 5.2 Ω ± 0.3 Ω at 20°C |
| Seal Type | Nitrile rubber O-rings (included) |
Compatibility
This solenoid is engineered for the ZF WG 210 series, but it also fits earlier WG 180 and WG 200 models due to shared valve body architecture. It is a direct replacement for transmissions in municipal trucks, refuse vehicles, and medium-duty construction equipment. Always verify the solenoid bore size in your valve body; the 6073.015.544 is compatible with housings such as the HOUS.FRONT SECT, HOUSING REAR PART, and HOUSING REAR SECTION. For complete assembly, pair this solenoid with a new TRANSMISSION HOUSING to prevent cross-threading and ensure proper alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing that encloses gear sets and valve body |
| 4657201166 | HOUS.FRONT SECT | Front section of the transmission housing, supports input shaft |
| 4657201170 | HOUSING REAR PART | Rear housing segment that contains output shaft bearings |
| 4657298102 | HOUSING REAR SECTION | Alternate rear housing casting for specific WG210 variants |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing-to-valve body mating |
| 0636100801 | CAP SCREW | M10 bolt for securing solenoid bracket to housing |
| 4656301148 | FIXING PLATE | Retainer plate that locks solenoid in valve body bore |
| 4657301032 | SCREEN SHEET | Fine mesh filter for solenoid inlet port (early design) |
| 4657301033 | SCREEN SHEET | Updated mesh filter with higher debris capacity |
| 0636100803 | CAP SCREW | M8 bolt for fixing plate attachment |
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