Overview
The ZF 4657.354.064 PUMP FLANGE is a precision-machined component engineered for the WG 210 Series transmission. This OEM genuine part serves as the critical interface between the hydraulic pump and the transmission housing, ensuring proper alignment and sealing for optimal oil flow and pressure regulation. As a key structural element, the pump flange (SKU: 4657.354.064) mounts directly to the TRANSMISSION HOUSING, providing a rigid mounting point that prevents vibration-induced wear. Without this flange, the pump cannot maintain the hydraulic pressure required for clutch engagement and gear shifts, making it indispensable for drivetrain reliability.
Symptoms of Failure
- Hydraulic fluid seepage around pump mounting area: A worn or cracked pump flange often causes oil to weep from the joint between the flange and the HOUS.FRONT SECT, leading to low fluid levels and eventual transmission overheating.
- Intermittent gear slipping under load: When the flange loses its sealing integrity, pump cavitation occurs, resulting in inconsistent hydraulic pressure that manifests as delayed or slipping gear engagement during heavy hauling.
- Unusual whining or grinding noises from the pump area: Misalignment caused by a deformed flange generates metal-on-metal contact between the pump drive gear and the HOUSING REAR PART, producing audible distress signals.
- Visible cracks or corrosion on the flange face: Thermal cycling and road salt exposure can cause stress fractures, which progressively worsen and lead to catastrophic pump failure if not addressed.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.354.064 |
| Material | High-grade cast aluminum alloy (EN AC-44100) |
| Overall Diameter | 185 mm |
| Bolt Hole Pattern | 6 x M10 on 150 mm PCD |
| Flange Thickness | 22 mm |
| Weight | 1.45 kg |
| OEM Reference | ZF 4657.354.064 |
| Sealing Surface Finish | Ra 0.8 µm |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This pump flange is primarily designed for the ZF WG 210 Series, but its mounting geometry also accommodates the WG 180 and WG 200 transmissions when used with the appropriate CYLINDRICAL PIN for alignment. It is compatible with all WG 210 variants (WG210, WG210C, WG210E) produced after 2005. For earlier WG 200 models, verify the bolt pattern matches the TRANSMISSION HOUSING casting number. The flange is not backward-compatible with WG 150 or WG 160 series due to different pump mounting footprints.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101075 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201151 | HOUS.FRONT SECT | Front section housing pump and torque converter |
| 4657201160 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for flange positioning |
| 0636100801 | CAP SCREW | M10 bolt for flange attachment |
| 4656301148 | FIXING PLATE | Retainer for pump flange bolts |
| 4657301032 | SCREEN SHEET | Fine mesh filter for pump inlet |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8 bolt for screen sheet retention |
| 0750301003 | OIL FEED.HOUSG. | Oil supply line housing |
