Overview
The ZF 4657.109.415 PARKING BRAKE is a critical mechanical locking mechanism designed specifically for the WG190 and WG210 series transmissions. This OEM genuine part engages a spring-applied, air-released brake to secure the output shaft, preventing vehicle roll-away when parked. Positioned within the rear section of the transmission housing, this component interfaces directly with the HOUSING REAR PART to ensure positive engagement. The SKU 4657.109.415 is the direct replacement for factory-installed units, guaranteeing exact fitment and load capacity for heavy-duty applications.
Symptoms of Failure
- Inability to hold vehicle on an incline: A worn parking brake fails to lock the output shaft, causing the vehicle to creep or roll on grades.
- Audible grinding or popping noises: Damaged internal pawls or springs produce metallic sounds when engaging or disengaging the brake.
- Air pressure leaks at the brake actuator: Deteriorated seals allow compressed air to escape, preventing full spring release and causing drag.
- Intermittent parking brake warning lights: Sensor misalignment due to worn components triggers false alerts on the dashboard.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.109.415 |
| OEM Reference | ZF 4657.109.415 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 2.8 kg (6.2 lbs) |
| Dimensions (L x W x H) | 185 mm x 95 mm x 70 mm |
| Operating Pressure | 8.5 bar (123 psi) max |
| Temperature Range | -40°C to +120°C |
Compatibility
This parking brake is engineered for ZF WG series transmissions, specifically the WG180, WG190, WG200, and WG210 models. It is a direct fit for all WG190 and WG210 variants, including those with integrated retarders. The assembly mounts securely to the HOUS.FRONT SECT and works in conjunction with the TRANSMISSION HOUSING to maintain structural integrity. For WG180 and WG200 applications, verify the rear housing variant; some units require the HOUSING REAR PART (4472239184) for correct alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101059 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201132 | HOUS.FRONT SECT | Front section housing input shaft and bearings |
| 4657201103 | HOUSING REAR PART | Rear housing supporting output shaft and brake |
| 4472239184 | HOUSING REAR PART | Alternate rear housing for specific WG variants |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for brake mounting bracket |
| 4656301148 | FIXING PLATE | Secures parking brake assembly to housing |
| 4657301032 | SCREEN SHEET | Filter screen for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Secondary filter screen for oil return |
| 0636100803 | CAP SCREW | Fastener for rear housing cover |
Frequently Asked Questions
Q: Can the 4657.109.415 parking brake be rebuilt, or must it be replaced entirely?
A: This is a sealed, non-serviceable unit. ZF recommends full replacement rather than attempting to rebuild internal spring and pawl mechanisms, as wear patterns are often uneven and safety-critical.
Q: Will this part fit a ZF WG180 transmission from 1998?
A: Yes, the 4657.109.415 is backward-compatible with WG180 units, provided the rear housing is the correct variant. Always cross-reference your existing housing part number with the HOUSING REAR PART (4472239184) for proper alignment.
Q: What torque specification is required for the cap screws securing this brake?
A: Use 45 Nm (33 ft-lbs) for the CAP SCREW (0636100801) and 55 Nm (41 ft-lbs) for the CAP SCREW (0636100803) on the rear housing. Always apply thread locker to prevent loosening under vibration.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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