Overview
The ZF 4699.109.024 BRAKE is a critical OEM genuine component engineered for the internal wet braking system within ZF construction machinery transmissions. This part is responsible for providing controlled deceleration and holding torque, directly engaging with the planetary gear sets to manage load distribution during heavy-duty operations. As a friction-based element, the 4699.109.024 ensures that the transmission can safely stop rotating shafts under high stress without slippage. It is housed within the main transmission casing and is often accessed during a full rebuild. The SKU 4699.109.024 is precision-machined to ZF’s exacting tolerances, making it a direct replacement for worn units in demanding environments like excavators and wheel loaders.
Symptoms of Failure
- Transmission brake slipping under load: When the ZF 4699.109.024 wears, the transmission may fail to hold position on inclines or during digging cycles, causing the machine to drift.
- Erratic gear engagement or delayed stopping: A failing brake can cause a noticeable lag when shifting from forward to reverse, or when applying the parking brake.
- Contaminated transmission oil with metallic debris: Worn friction material from the brake disc often sheds particles into the oil, visible during routine fluid changes as a dark, gritty residue.
- Overheating in the transmission housing: Excessive friction from a glazed or warped brake can generate localized heat, leading to oil degradation and seal failure.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4699.109.024 |
| Type | Wet Brake Disc / Friction Plate |
| Outer Diameter | ~180 mm (estimated) |
| Inner Diameter | ~120 mm (estimated) |
| Thickness | ~4.5 mm (new) |
| Material | Sintered bronze on steel core |
| Weight | 0.85 kg (approx.) |
| OEM Reference | ZF 4699.109.024 |
Compatibility
This brake component is primarily designed for use in ZF’s heavy-duty powershift transmission series, including the WG180, WG200, and WG250 models commonly found in construction machinery. It also fits select ERGO and ECOMIX series transmissions used in telehandlers and loaders. The 4699.109.024 interfaces directly with the 4699101079: HOUSING, which encloses the brake pack, and is sealed by the 0634306309: O-RING to prevent fluid leaks. During installation, the 0501329881: HOUSING COVER must be properly torqued, and the 0637885612: BREATHER should be inspected to ensure proper pressure equalization within the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101079 | HOUSING | Encloses the brake pack and supports shaft alignment |
| 0501329881 | HOUSING COVER | Seals the housing and provides access for service |
| 0634306309 | O-RING | Prevents oil leakage between housing and cover |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
| 0501319149 | SCREW PLUG | Seals oil passages in the housing |
| 0636302022 | SCREW PLUG | Provides drain or fill port sealing |
| 0634801038 | SEALING RING | Ensures leak-free connections on threaded ports |
| 0730365801 | TYPE PLATE | Identifies transmission model and serial number |
| 4699001070 | GK10 | Gasket kit containing seals for brake pack rebuild |
| 4699102158 | INPUT | Input shaft assembly that drives the brake pack |
