Overview
The ZF 4699.109.050 BRAKE PARTS assembly is a critical friction component engineered for heavy-duty construction machinery transmissions. This OEM genuine part functions as a primary braking interface within the planetary gear set, converting hydraulic pressure into mechanical stopping force to control output shaft rotation. Positioned directly within the clutch pack housing, the 4699.109.050 ensures precise torque modulation during loader, dozer, and excavator operations. As a wear-sensitive element, this SKU directly influences shift quality and machine safety in demanding off-highway environments.
Symptoms of Failure
- Delayed engagement or transmission brake slipping – When the friction material wears below specification, operators experience hesitation between gear shifts, especially under load in construction machinery.
- Hydraulic fluid contamination with dark particles – Degraded brake linings shed carbon debris into the oil circuit, often visible during routine filter inspections or oil changes.
- Erratic machine creep on inclines – Worn 4699.109.050 components fail to hold static torque, causing unintended vehicle movement on grades or during parking brake application.
- Audible grinding or chattering during braking – Metal-to-metal contact from complete friction material loss produces a distinct noise, indicating imminent transmission damage.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.109.050 |
| Material | Sintered bronze friction lining on steel core |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Thickness | 3.5 mm (new) |
| Weight | 0.45 kg |
| OEM Reference | ZF 4699.109.050 |
| Torque Capacity | 850 Nm (estimated) |
Compatibility
This brake part is designed for integration into ZF WG180, WG200, and WG211 series powershift transmissions commonly found in wheel loaders, telehandlers, and graders. It also fits select variants of the ZF 4WG-200 and 6WG-200 models used in articulated dump trucks. Always verify the clutch pack stack height and spline count against your specific transmission serial number before installation.
Installation Context
During replacement of the 4699.109.050, technicians must inspect the surrounding assembly for wear. The brake pack sits inside the 4699101049 HOUSING, which provides the structural bore for the friction discs. Adjacent to this, the 4699301188 HOUSING supports the piston return springs. The entire unit is sealed by the 4699301128 COVER, which must be torqued precisely using 0636015047 HEXAGON SCREW fasteners to prevent oil bypass. Proper sealing also requires replacing the 0734307406 SEALING RING and 0634801038 SEALING RING during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101049 | HOUSING | Contains brake pack and aligns friction discs |
| 4699301188 | HOUSING | Supports piston and spring assembly |
| 4699301128 | COVER | Seals transmission case and retains components |
| 0636015047 | HEXAGON SCREW | Fastens cover to housing |
| 0734307406 | SEALING RING | Prevents fluid leakage at shaft interface |
| 0501319149 | SCREW PLUG | Closes hydraulic test ports |
| 0634801038 | SEALING RING | Seals plug and cap screw threads |
| 0636101041 | CAP SCREW | Secures valve body to housing |
| 0636101036 | CAP SCREW | Mounts clutch pack retaining plate |
| 0636101032 | CAP SCREW | Fastens oil distribution ring |
