Overview
The ZF 4657.109.407 PARKING BRAKE is a critical safety and holding component engineered specifically for the WG 190 Series transmission family. This OEM genuine part integrates directly into the rear output section of the transmission assembly, engaging the driveline to prevent vehicle roll when parked or during stationary operation. The SKU 4657.109.407 ensures precise fitment and reliable clamping force, working in concert with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity under load. This genuine part is designed to withstand high static torque demands without deformation, making it indispensable for heavy-duty industrial applications.
Symptoms of Failure
- Intermittent parking brake release or failure to hold on inclines: When the internal friction surfaces wear, the brake loses clamping force, causing the vehicle to creep even when engaged.
- Audible grinding or scraping noise from the transmission rear section: Worn components within the 4657.109.407 assembly can contact the HOUSING REAR PART, producing metallic sounds during engagement or disengagement.
- Oil seepage around the parking brake actuator area: Degraded seals allow transmission fluid to escape, often visible as drips near the output flange.
- Increased pedal or lever travel before brake engagement: Excessive clearance in the mechanism indicates worn linings or stretched linkage components.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.109.407 |
| OEM Reference | ZF 4657.109.407 |
| Material | High-strength alloy steel with friction lining |
| Weight | 2.8 kg (estimated) |
| Overall Diameter | 180 mm |
| Mounting Bolt Pattern | 6 x M10 on 140 mm PCD |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This parking brake unit is primarily designed for the ZF WG 190 Series transmissions. Based on its mechanical interface and mounting dimensions, it is also compatible with the WG 180 and WG 200 series models that share the same rear housing architecture. The part interfaces directly with the CYLINDRICAL PIN for precise alignment and actuation. Always verify your transmission model suffix before ordering, as variations exist between early and late production units.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201012 | HOUSING REAR PART | Rear section enclosing output components |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for brake assembly |
| 0636100801 | CAP SCREW | Fastener for housing attachment |
| 4656301148 | FIXING PLATE | Retains brake components in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | Secondary housing fastener |
| 4681301040 | OIL FEED.HOUSG. | Lubrication supply channel |
Frequently Asked Questions
Q: Can the 4657.109.407 parking brake be rebuilt, or must it be replaced entirely?
A: This OEM genuine part is a sealed assembly. While some external seals can be replaced, internal friction surface wear typically requires full replacement to maintain holding torque specifications.
Q: How do I confirm this part fits my WG 190 transmission?
A: Check the transmission data plate for the exact model code. The 4657.109.407 is standard on WG 190 units built after 2010, but earlier models may require the HOUSING REAR PART update for compatibility.
Q: What torque specification is required for the mounting bolts?
A: Use 45 Nm for the cap screws (part 0636100801) and 25 Nm for the fixing plate (part 4656301148). Always apply thread locker.
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Phone: +86 158 2286 3467 |
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