Overview
The ZF 6057.018.623 EST 37 A for WG211 is a critical electro-hydraulic control unit that manages clutch engagement and shift timing within the transmission valve body. This OEM genuine part, identified by SKU 6057.018.623, regulates hydraulic pressure to ensure smooth gear transitions in heavy-duty WG 211 series transmissions. It interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, forming the core of the transmission’s electronic control system. Without this component, the transmission cannot execute commands from the ECU, leading to operational failure.
Symptoms of Failure
When the ZF 6057.018.623 EST 37 A begins to fail, operators typically notice three distinct issues. First, delayed or harsh gear engagement occurs as the solenoid loses precise pressure control, causing jarring shifts. Second, intermittent transmission slipping under load becomes apparent, especially when climbing grades or hauling heavy payloads. Third, internal hydraulic fluid contamination from worn seals can trigger erratic shifting patterns. Finally, a complete loss of forward or reverse gears may happen if the unit fails electrically, often accompanied by a check-engine light.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6057.018.623 |
| OEM Reference | EST 37 A |
| Material | Aluminum alloy with steel solenoid core |
| Weight | 1.8 kg (3.97 lbs) |
| Dimensions | 185 mm x 95 mm x 65 mm |
| Operating Pressure | 12-18 bar |
| Voltage Range | 12V / 24V DC |
Compatibility
This EST 37 A unit is engineered for the WG 211 Series but also fits select variants in the WG180, WG200, and WG250 transmission families. It is commonly used in ZF Ecomat and Ecolife platforms where the HOUSING REAR PART and CYLINDRICAL PIN are present. Always verify your transmission serial number against the OEM parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657301130 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4657301131 | HOUSING REAR PART | Rear housing for output shaft and bearings |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636102489 | CAP SCREW | Fastener for valve body attachment |
| 4656301148 | FIXING PLATE | Retention bracket for solenoid assembly |
| 0636102463 | CAP SCREW | Mounting bolt for control unit |
| 4657201133 | SCREEN SHEET | Filter mesh for hydraulic fluid |
| 0636115287 | CAP SCREW | High-tensile fastener for housing |
| 4657301065 | PLATE | Spacer plate for valve body |
Frequently Asked Questions
Q: Can the ZF 6057.018.623 EST 37 A be repaired, or must it be replaced?
A: This unit is a sealed electro-hydraulic assembly. Internal solenoid wear or circuit board damage typically requires full replacement rather than repair. We recommend replacing it with the OEM genuine part to ensure proper shift calibration.
Q: How do I know if my WG211 transmission needs this specific part?
A: If your transmission exhibits erratic shifting or fails to engage gears, and diagnostic codes point to the valve body solenoid circuit, this EST 37 A unit is likely the culprit. Always cross-reference your transmission model with the WG211 series compatibility list.
Q: What other parts should I inspect when replacing the EST 37 A?
A: We strongly recommend inspecting the SCREEN SHEET for debris and replacing all CAP SCREW fasteners to prevent oil leaks. Also verify the condition of the PLATE for warping.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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