Overview
The ZF 0501.333.790 BRAKE is a critical OEM genuine component engineered for the internal braking systems within ZF heavy-duty construction machinery transmissions. This part functions as a friction-based stopping mechanism, engaging directly with the planetary gear sets to control shaft rotation and provide holding torque when the machine is stationary. Positioned within the transmission housing, it works in concert with the HOUSING to ensure precise modulation of power flow. The SKU 0501.333.790 identifies this as a factory-spec brake assembly, guaranteeing exact fitment and wear resistance for demanding off-highway applications.
Symptoms of Failure
- Transmission brake drag or overheating: When the brake fails to fully disengage, you may notice excessive heat radiating from the transmission housing, often accompanied by a burnt clutch smell during operation.
- Intermittent gear slipping under load: A worn 0501.333.790 brake can cause the transmission to lose holding power, resulting in unexpected vehicle roll on inclines or slipping during digging cycles.
- Oil contamination with metallic debris: As friction material wears away, fine metal particles may appear in the transmission fluid, visible during routine oil changes or filter inspections.
- Delayed engagement or harsh shifting: A failing brake may cause a noticeable lag when shifting from neutral to drive, or produce a jarring engagement as the brake struggles to lock the planetary carrier.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 0501.333.790 |
| Type | Friction Brake Assembly |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness | 4.5 mm (friction plate) |
| Material | Sintered Bronze on Steel Core |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 0501.333.790 |
Compatibility
This brake assembly is primarily designed for use in ZF WG180, WG200, and WG210 series powershift transmissions commonly found in wheel loaders, excavators, and telehandlers. It also fits select variants of the ZF 4WG-180 and 4WG-200 models. For proper installation, ensure the GK10LD clutch pack is correctly aligned, and verify that the INPUT shaft and OUTPUT shaft are free of scoring. Always replace the brake in conjunction with the O-RING and SNAP RING to prevent fluid leaks and secure retention.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699001152 | GK10LD | Clutch pack for gear engagement |
| 4699101108 | HOUSING | Transmission case section |
| 4699102172 | INPUT | Input shaft assembly |
| 4699103057 | OUTPUT | Output shaft assembly |
| 4699105091 | TURNTABLE BEARING | Rotary support bearing |
| 0501329881 | HOUSING COVER | Sealing cover for housing |
| 0630513065 | SNAP RING | Retaining ring for shaft |
| 0634306309 | O-RING | Hydraulic seal |
| 0637885612 | BREATHER | Pressure equalization valve |
| 0769100082 | TYPE PLATE | Identification label |
