Overview
The ZF 4657.109.413 PARKING BRAKE is a critical safety and holding component engineered specifically for the WG190 and related heavy-duty transmission series. This OEM genuine part engages a mechanical locking mechanism on the output shaft, ensuring the vehicle remains stationary when parked, even on steep gradients. As an integral element of the transmission’s rear housing assembly, the parking brake works in concert with the TRANSMISSION HOUSING to provide reliable static torque retention. The SKU 4657.109.413 is precision-machined to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in demanding industrial applications.
Symptoms of Failure
When the ZF 4657.109.413 PARKING BRAKE begins to wear, operators will notice distinct performance issues. Vehicle roll-back on inclines is the most common symptom, indicating the brake pads or internal springs have lost clamping force. Another frequent failure sign is grinding or metallic scraping noises when engaging or disengaging the parking brake, often caused by worn friction surfaces contacting the drum. Intermittent brake release failure—where the brake sticks after disengagement—can also occur, leading to driveline binding. Finally, visible oil seepage around the brake actuator suggests seal degradation, which can contaminate the friction material and reduce holding capacity.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.109.413 |
| OEM Reference | ZF 4657.109.413 |
| Material | High-tensile steel with sintered friction lining |
| Weight | 4.2 kg (9.26 lbs) |
| Outer Diameter | 210 mm |
| Bore Diameter | 45 mm |
| Operating Temperature Range | -40°C to +120°C |
| Max Static Torque | 2,500 Nm |
Compatibility
This parking brake is designed for ZF’s WG series powershift transmissions, specifically the WG180, WG190, WG200, WG210, and WG230 models. It is also compatible with the BP 210 and BP 230 series. The part mounts directly to the HOUS.FRONT SECT and interfaces with the HOUSING REAR PART and the HOUSING REAR SECTION to form a sealed, robust assembly. Always verify your transmission model’s serial number before ordering to ensure correct fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201170 | HOUSING REAR PART | Rear housing segment supporting output shaft |
| 4657298102 | HOUSING REAR SECTION | Final rear housing cover plate |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing attachment |
| 4656301148 | FIXING PLATE | Retaining plate for brake components |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Secondary mesh filter for hydraulic system |
| 0636100803 | CAP SCREW | High-strength bolt for brake assembly |
Frequently Asked Questions
Q: Can the 4657.109.413 parking brake be rebuilt, or must it be replaced?
A: While the friction lining can sometimes be replaced, ZF recommends replacing the entire unit as an assembly. Internal spring fatigue and seal wear are common in high-cycle applications, making a full replacement more reliable than a partial rebuild.
Q: What is the typical service interval for this parking brake in a WG190 transmission?
A: Service life varies by application, but in heavy construction equipment, inspection is recommended every 2,000 operating hours. Replacement is typically needed between 6,000 and 8,000 hours depending on load cycles and maintenance history.
Q: Will this part fit a ZF WG180 transmission?
A: Yes, the 4657.109.413 is cross-compatible with the WG180, WG190, WG200, WG210, and WG230 series. However, always confirm your transmission’s serial number and housing configuration, as some early WG180 units may require an adapter plate.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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