Overview
The ZF 4699.109.084 BRAKE is a critical OEM genuine component designed to deliver precise stopping power and load-holding capability within heavy-duty ZF transmissions used in construction machinery. This brake assembly engages directly within the planetary gear set to control output shaft rotation, ensuring safe operation during loading, dumping, and travel cycles. The SKU 4699.109.084 is engineered to factory tolerances for direct bolt-in replacement, eliminating the need for modifications. It works in concert with the 4699101095: HOUSING to contain hydraulic pressure and with the 0501329881: HOUSING COVER to seal the clutch pack from contaminants.
Symptoms of Failure
When the ZF 4699.109.084 brake wears out, operators will notice distinct performance degradation. Watch for these specific failure symptoms:
- Machine creep on inclines: The transmission fails to hold the vehicle stationary when the brake is engaged, indicating worn friction discs.
- Delayed engagement or soft braking: A spongy pedal feel or a lag between lever movement and actual stopping action suggests internal seal leakage or glazed friction material.
- Darkened hydraulic fluid with burnt odor: Slipping brake packs generate excessive heat, causing the transmission oil to darken and emit a distinct burnt smell.
- Intermittent loss of braking under load: The brake may work in light conditions but fails during heavy excavation or lifting cycles, pointing to worn return springs or piston seal failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4699.109.084 |
| Type | Multi-disc wet brake (spring-applied, hydraulically released) |
| Outer Diameter | 210 mm (8.27 in) |
| Inner Diameter | 140 mm (5.51 in) |
| Total Thickness (stacked) | 48 mm (1.89 in) |
| Material | Sintered bronze friction discs / hardened steel separator plates |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4699.109.084 |
| Seal Compatibility | Use 0634306309: O-RING for piston seal replacement |
| Ventilation | Requires 0637885612: BREATHER for pressure equalization |
Compatibility
This brake assembly is designed for ZF heavy-duty powershift transmissions commonly found in wheel loaders, excavators, and telehandlers. It is directly compatible with the following ZF transmission models:
- ZF WG180
- ZF WG200
- ZF WG210
- ZF 4WG-200
- ZF 4WG-210
Always verify the spline count and stack height against your existing assembly. For complete rebuilds, pair this brake with a new HOUSING and HOUSING COVER to ensure proper alignment and oil flow.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101095 | HOUSING | Encloses the brake pack and directs oil flow |
| 0501329881 | HOUSING COVER | Seals the brake cavity and supports the piston |
| 0634306309 | O-RING | Prevents hydraulic fluid bypass around the piston |
| 0637885612 | BREATHER | Equalizes internal pressure and vents moisture |
| 0769100082 | TYPE PLATE | Identifies transmission model and serial number |
| 4699001121 | GK10 | Gear kit for input reduction stage |
| 4699102158 | INPUT | Input shaft assembly transferring torque from engine |
| 4699103063 | OUTPUT | Output shaft delivering power to the driveline |
| 4699105042 | TURNTABLE BEARING | Supports rotating load in swing gear applications |
| 4699302299 | DRIVE PINION | Engages with ring gear for final drive reduction |
