Overview
The ZF 0501.216.623 BRAKE is a critical OEM genuine component designed to provide controlled deceleration and secure holding within heavy-duty construction machinery transmissions. This part functions as a friction-based stopping mechanism, engaging directly with the rotating drum or shaft to manage torque and prevent unintended movement during operation. Specifically engineered for demanding off-highway environments, the SKU 0501.216.623 ensures precise engagement and disengagement cycles, reducing wear on adjacent assemblies. It is typically located within the transmission housing, where it interfaces with the 4699101079: HOUSING to maintain structural integrity and alignment under high load conditions.
Symptoms of Failure
- Transmission brake drag or overheating: When the brake fails to fully disengage, friction material generates excessive heat, leading to fluid degradation and reduced component life.
- Intermittent gear slipping during deceleration: Worn brake pads or glazed surfaces cause inconsistent holding power, resulting in unexpected vehicle roll on inclines or during load shifts.
- Hydraulic fluid contamination from debris: As the brake lining wears, particulate matter enters the transmission circuit, often clogging valves and accelerating damage to the 0501329881: HOUSING COVER sealing surfaces.
- Audible grinding or squealing under load: Metal-on-metal contact indicates complete lining depletion, requiring immediate replacement to avoid scoring the mating drum surface.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.216.623 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 180 mm (approx.) |
| Inner Diameter | 110 mm (approx.) |
| Thickness | 8.5 mm (new) |
| Weight | 1.2 kg |
| OEM Reference | ZF 0501.216.623 |
Compatibility
This brake assembly is engineered for integration with ZF WG series transmissions commonly used in wheel loaders, graders, and telehandlers. It is directly compatible with the WG180, WG200, and WG210 models, where it serves as the primary parking and secondary service brake. The part also fits select variants of the 4WG-200 and 6WG-200 series, provided the transmission uses a wet brake configuration. For proper sealing during installation, always replace the 0634306309: O-RING and verify the condition of the 0637885612: BREATHER to prevent pressure buildup that could compromise brake response.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101079 | HOUSING | Encloses and aligns the brake assembly within the transmission |
| 0501329881 | HOUSING COVER | Seals the brake chamber and provides access for service |
| 0634306309 | O-RING | Prevents fluid leakage between mating housing surfaces |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture from the housing |
| 0501319149 | SCREW PLUG | Seals hydraulic ports during transport and storage |
| 0636302022 | SCREW PLUG | Provides secondary port sealing for pressure testing |
| 0634801038 | SEALING RING | Ensures leak-free connection between brake lines and housing |
| 0730365801 | TYPE PLATE | Identifies transmission model and serial number for part verification |
| 4699001070 | GK10 | Gear kit that transfers torque from the brake to the output shaft |
| 4699102158 | INPUT | Input shaft assembly that drives the brake drum rotation |
