Overview
This OEM genuine ZF 4657.109.412 PARKING BRAKE is a critical safety and holding component engineered specifically for the WG 210 Series transmission. It integrates directly into the rear section of the gearbox assembly, where it mechanically locks the output shaft to prevent vehicle rollaway when parked. The SKU 4657.109.412 ensures precise engagement and disengagement of the parking pawl, working in concert with the HOUSING REAR PART to maintain structural integrity under load. Without this genuine part, the transmission cannot safely secure the driveline during stationary operation.
Symptoms of Failure
- Transmission fails to hold on incline: A worn parking brake allows the vehicle to creep or roll when parked on a slope, indicating internal pawl or actuator wear.
- Grinding noise when engaging park: Damaged components within the 4657.109.412 assembly produce a metallic scraping sound as the pawl struggles to seat against the output gear.
- Intermittent park release: The parking brake may unexpectedly disengage or require excessive force to release, pointing to fatigue in the spring or linkage mechanism.
- Oil seepage near rear housing: A compromised parking brake seal can cause transmission fluid to leak from the interface with the HOUS.FRONT SECT, leading to low fluid levels and potential gear slipping.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 4657.109.412 |
| OEM Reference | ZF 4657.109.412 |
| Material | High-tensile steel with hardened pawl surface |
| Weight | 1.8 kg (approx.) |
| Dimensions (L x W x H) | 210 mm x 95 mm x 75 mm |
| Mounting Torque | 45 Nm (recommended) |
| Operating Temperature | -40°C to +120°C |
Compatibility
This ZF 4657.109.412 parking brake is designed for the WG 210 Series transmission family. Based on its part type and mounting configuration, it is also compatible with the following ZF models: WG180, WG200, and WG250. It interfaces directly with the TRANSMISSION HOUSING and is secured using a CYLINDRICAL PIN for precise alignment. Always verify your transmission serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201020 | HOUSING REAR PART | Rear section supporting parking brake assembly |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4656301148 | FIXING PLATE | Secures internal components |
| 4657301032 | SCREEN SHEET | Filter mesh for oil flow |
| 4657301033 | SCREEN SHEET | Secondary filter mesh |
| 0636100803 | CAP SCREW | Fastener for rear housing |
| 4681301040 | OIL FEED.HOUSG. | Lubrication supply channel |
Frequently Asked Questions
Q: Can I replace the ZF 4657.109.412 parking brake without removing the transmission?
A: In most WG210 applications, the parking brake can be serviced by removing the rear housing cover. However, access to the HOUSING REAR PART is required, and the vehicle must be safely supported.
Q: What causes premature failure of this parking brake part?
A: Common causes include frequent parking on steep grades without using the service brake, contamination from debris in the transmission fluid, or improper torque on the CAP SCREW fasteners leading to misalignment.
Q: Is the 4657.109.412 compatible with the WG180 transmission?
A: Yes, this part shares the same mounting pattern and pawl geometry used in the WG180, WG200, and WG250 series. Always cross-reference your existing part number before purchase.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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