Overview
The ZF 4657.109.419 PARKING BRAKE is a critical safety and holding component engineered specifically for the WG 210 Series transmission. This OEM genuine part integrates directly into the output section of the gearbox, engaging a mechanical lock on the driveline to prevent vehicle rollaway when parked. As a wear-and-tear item, the SKU 4657.109.419 ensures that the parking pawl mechanism engages with precise force and disengages cleanly, maintaining the integrity of the entire drivetrain assembly. It works in close conjunction with the 4657101080: TRANSMISSION HOUSING to provide a sealed, robust environment for the locking mechanism.
Symptoms of Failure
When the 4657.109.419 parking brake unit begins to degrade, operators will notice distinct operational issues. Look for these specific failure symptoms:
- Intermittent gear slipping on inclines: The vehicle may roll slightly after the parking brake is engaged, indicating the pawl is not fully seating against the gear.
- Audible grinding or ratcheting noise: A metallic clicking or grinding sound when engaging the parking brake suggests worn teeth on the pawl or actuator.
- Hard or impossible disengagement: The shift lever becomes stuck in the Park position, or requires excessive force to release, pointing to a seized or corroded internal component.
- Oil seepage near the output flange: A degraded seal within the parking brake assembly can allow transmission fluid to leak past the 4657201167: HOUS.FRONT SECT interface.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 4657.109.419 |
| OEM Reference | ZF Genuine (WG210 Series) |
| Material | Hardened Steel / Sintered Metal |
| Weight (approx.) | 2.4 kg (5.3 lbs) |
| Dimensions (L x W x H) | 180 mm x 120 mm x 85 mm |
| Torque Capacity | Up to 2,500 Nm holding force |
| Operating Temperature | -40°C to +120°C |
Compatibility
This parking brake assembly is primarily designed for the WG 210 Series transmission, but its mounting pattern and spline count also make it a direct fit for several other ZF heavy-duty models. It is commonly used in the WG180, WG200, and WG250 series gearboxes. The unit interfaces directly with the 4657201171: HOUSING REAR PART and the 4657298103: HOUSING REAR SECTION to complete the rear output assembly. Always verify your transmission’s serial number against ZF’s OEM catalog to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for the gearbox |
| 4657201167 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201171 | HOUSING REAR PART | Rear housing section for output assembly |
| 4657298103 | HOUSING REAR SECTION | Secondary rear housing component |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retaining plate for internal components |
| 4657301034 | SCREEN SHEET | Filter screen for oil circulation |
| 4657301035 | SCREEN SHEET | Secondary filter screen element |
| 0636100803 | CAP SCREW | Additional housing fastener |
