Overview
The ZF 4642.109.016 PARKING BRAKE is a critical safety and holding component designed exclusively for the WG 150 Series transmission. This OEM genuine part engages mechanically to lock the output shaft, preventing vehicle roll-away when parked or during stationary operation. Positioned within the rear housing assembly, the parking brake interfaces directly with the transmission’s internal drum mechanism. The SKU 4642.109.016 ensures a precise fit and original ZF performance, making it the definitive replacement for maintaining secure parking functionality in heavy-duty industrial applications.
Symptoms of Failure
- Vehicle rolls on inclines: If the parking brake fails to hold the vehicle on a slope, the 4642.109.016 unit may have worn friction surfaces or broken internal springs.
- Grinding or scraping noise when engaging: A metallic sound during activation often indicates damaged brake shoes or debris lodged within the assembly, requiring immediate replacement of the parking brake.
- Intermittent release or sticking: Difficulty disengaging the brake suggests corrosion or mechanical binding in the 4642.109.016 mechanism, leading to unsafe driving conditions.
- Oil seepage near the brake housing: Leaks around the output shaft area can indicate seal failure within the parking brake unit, compromising both braking force and transmission fluid integrity.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.109.016 |
| OEM Reference | ZF 4642.109.016 |
| Material | High-strength steel with sintered friction lining |
| Weight | 2.8 kg (6.2 lbs) |
| Dimensions (L x W x H) | 180 mm x 120 mm x 90 mm |
| Compatible Series | WG 150 |
Compatibility
While the 4642.109.016 PARKING BRAKE is specifically engineered for the WG 150 Series, it shares mounting patterns and operational characteristics with other ZF WG-family transmissions. Based on part architecture, this brake unit is also compatible with the WG 180 and WG 200 series, though verification of housing dimensions is recommended. For a complete assembly, ensure the 4642101109: TRANSMISSION HOUSING and 4642301205: TRANSMISSION HOUSING are properly aligned. Additionally, the 0730365125: TYPE PLATE identifies the exact transmission variant, while the 0631311009: GROOVED STUD secures the brake assembly to the housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses and supports internal transmission components |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 0730365125 | TYPE PLATE | Identifies transmission model and specifications |
| 0631311009 | GROOVED STUD | Secures parking brake to housing |
| 4642301168 | SCREEN SHEET | Filters transmission fluid debris |
| 4642301169 | SCREEN SHEET | Secondary fluid filtration element |
| 0636100621 | HEXAGON SCREW | Fastens housing and brake components |
| 4642301186 | SCREEN SHEET | Fine mesh filter for hydraulic circuits |
| 4644106300 | SHIFT SYSTEM | Controls gear selection and engagement |
| 4644306500 | COVER PLATE | Protects internal shift mechanism |
