Overview
The ZF 4657.162.002 PRESSURE REGULATOR is a critical hydraulic control component engineered specifically for the WG210 transmission series. This OEM genuine part modulates fluid pressure within the valve body assembly, ensuring precise clutch engagement and torque converter lock-up. Positioned directly within the main control circuit, the SKU 4657.162.002 maintains consistent hydraulic force to prevent erratic shifting. When paired with a robust TRANSMISSION HOUSING, this regulator forms the backbone of the transmission’s oil management system.
Symptoms of Failure
- Erratic shift timing or gear slipping – A worn 4657.162.002 often causes delayed or harsh shifts, particularly during acceleration under load.
- Oil leaks near the valve body – Deteriorating seals on this pressure regulator lead to external fluid seepage, visible as drips on the HOUS.FRONT SECT.
- Torque converter shudder – Inconsistent pressure regulation results in vibration during lock-up, especially at highway speeds.
- Transmission overheating – Faulty pressure control forces the system to run at higher internal temperatures, accelerating wear on adjacent components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.162.002 |
| OEM Reference | ZF 4657.162.002 |
| Material | Hardened steel with nitrile seals |
| Weight | 0.45 kg (1.0 lb) |
| Dimensions (L x W x H) | 85 mm x 40 mm x 35 mm |
| Operating Pressure Range | 8–22 bar |
| Thread Size | M12 x 1.5 |
Compatibility
This pressure regulator is primarily designed for the ZF WG210 series, but it also fits the WG180, WG200, and WG250 transmissions due to shared valve body architecture. It is commonly used in off-highway vehicles, including loaders and graders. For proper installation, ensure the HOUSING REAR PART is free of debris, and secure the assembly with a CYLINDRICAL PIN to prevent misalignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101042 | TRANSMISSION HOUSING | Encloses gear train and valve body |
| 4657201028 | HOUS.FRONT SECT | Front section of main housing |
| 4657201013 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastens valve body to housing |
| 4656301148 | FIXING PLATE | Secures pressure regulator in position |
| 4657301034 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4657301035 | SCREEN SHEET | Secondary filtration screen |
| 0636100803 | CAP SCREW | Mounting bolt for rear housing |
| 4656301048 | OIL FEED.HOUSG. | Directs pressurized oil to regulator |
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