Overview
This OEM genuine ZF 6057.018.635 EST 37 A is a critical valve body assembly designed specifically for the WG 211 Series transmission. It functions as the hydraulic control unit, directing oil flow to actuate clutches and regulate shift timing. Positioned within the main transmission casing, this component ensures precise gear engagement and smooth power delivery under heavy-duty loads. The SKU 6057.018.635 is engineered to meet original equipment tolerances, making it a direct replacement for worn or failed units in ZF industrial transmissions.
Symptoms of Failure
When the ZF 6057.018.635 EST 37 A begins to fail, operators often notice erratic or delayed gear engagement during acceleration. A second common symptom is intermittent transmission slipping under load, particularly when shifting between second and third gears. You may also experience hard or harsh shifting accompanied by hydraulic noise, indicating internal valve wear. Finally, fluid contamination from metallic debris in the oil pan can signal degradation of this valve body assembly, requiring immediate inspection.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 6057.018.635 |
| Designation | EST 37 A |
| Material | High-strength aluminum alloy with hardened steel spools |
| Weight | 2.85 kg (6.28 lbs) |
| Dimensions (L x W x H) | 245 mm x 135 mm x 85 mm |
| OEM Reference | ZF 6057.018.635 |
| Operating Pressure | 12-18 bar (174-261 psi) |
| Seal Type | Nitrile rubber O-rings (included) |
Compatibility
This valve body is primarily designed for the ZF WG 211 Series transmission. It is also compatible with the WG180, WG200, and WG210 models, as these share the same hydraulic control architecture. Always verify your transmission serial number before installation. The part integrates directly with the TRANSMISSION HOUSING, which encloses the entire valve assembly. For front-end sealing, the HOUS.FRONT SECT and HOUSING REAR PART provide structural support. Secure mounting is achieved using a CYLINDRICAL PIN for precise alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main casing that encloses all internal components |
| 4657301130 | HOUS.FRONT SECT | Front section housing for input shaft and pump |
| 4657301131 | HOUSING REAR PART | Rear section supporting output shaft and bearings |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise assembly of housing sections |
| 0636102489 | CAP SCREW | Fastener for securing valve body to housing |
| 4656301148 | FIXING PLATE | Retaining plate for valve body alignment |
| 0636102463 | CAP SCREW | Bolt for fixing plate attachment |
| 4657201133 | SCREEN SHEET | Oil filter screen protecting valve body from debris |
| 0636115287 | CAP SCREW | Fastener for screen sheet retention |
| 4657301065 | PLATE | Spacer plate between valve body and housing |
Frequently Asked Questions
Q: Can I install the 6057.018.635 without replacing the transmission housing?
A: Yes, this valve body is a direct swap. However, we recommend inspecting the TRANSMISSION HOUSING for cracks or wear, as misalignment can cause premature failure.
Q: What is the typical lifespan of the EST 37 A valve body?
A: Under normal operating conditions with clean fluid, this part lasts 300,000 to 500,000 km. Contaminated oil or debris can reduce lifespan significantly.
Q: Do I need to replace the CYLINDRICAL PIN during installation?
A: Yes, always use a new CYLINDRICAL PIN to ensure proper alignment between the housing sections and valve body.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
