Overview
The ZF 6057.018.787 EST 37 A for WG211 is a precision-engineered solenoid valve assembly that regulates hydraulic pressure within the transmission control unit. This OEM genuine part, identified by SKU 6057.018.787, directly manages clutch pack engagement and shift timing in the WG 211 series. Positioned within the valve body, it converts electrical signals from the transmission control module into precise hydraulic actions, ensuring smooth gear transitions. When paired with a robust TRANSMISSION HOUSING, this component maintains critical fluid pathways for consistent performance.
Symptoms of Failure
- Delayed or harsh shifting: A worn EST 37 A solenoid causes erratic clutch application, leading to noticeable lag between gear changes or abrupt engagement.
- Transmission fluid leaks around the valve body: Internal seal degradation allows pressurized oil to escape, often pooling near the HOUS.FRONT SECT interface.
- Intermittent gear slippage under load: When the solenoid fails to maintain adequate line pressure, the transmission may momentarily lose torque transfer during acceleration.
- Illuminated check engine or transmission warning light: Fault codes related to shift solenoid circuit malfunctions frequently trace back to this part.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6057.018.787 |
| OEM Reference | ZF EST 37 A |
| Material | Hardened steel body with brass spool |
| Operating Pressure | 8–22 bar |
| Weight | 0.45 kg |
| Dimensions (L x W x H) | 85 mm x 45 mm x 40 mm |
| Seal Type | Nitrile rubber O-rings |
Compatibility
This solenoid is engineered for the ZF WG 211 series but also fits select WG180 and WG200 variants with identical valve body architecture. It directly interfaces with the HOUSING REAR PART and is secured using a CYLINDRICAL PIN for precise alignment. Always verify your transmission model suffix before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657301130 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657301131 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636102489 | CAP SCREW | M10 fastener for valve body retention |
| 4656301148 | FIXING PLATE | Bracket securing solenoid harness |
| 0636102463 | CAP SCREW | M8 bolt for cover plate |
| 4657201133 | SCREEN SHEET | Filter mesh for hydraulic fluid |
| 0636115287 | CAP SCREW | M6 fastener for solenoid bracket |
| 4657301065 | PLATE | Spacer plate between valve body sections |
Frequently Asked Questions
Q: Can the 6057.018.787 solenoid be tested before installation?
A: Yes. Measure coil resistance between terminals; it should read 5.2–6.8 ohms at 20°C. Also verify that the spool moves freely when 12V is applied.
Q: Does this part require recalibration after replacement?
A: Most ZF WG211 controllers adapt automatically after 10–15 drive cycles, but a professional scan tool can reset adaptive values for immediate improvement.
Q: What is the typical lifespan of this solenoid?
A: Under normal operating conditions and with clean fluid, the EST 37 A lasts 150,000–200,000 km. Contaminated oil accelerates wear significantly.
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Phone: +86 158 2286 3467 |
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