Overview
The ZF 4699.109.030 BRAKE is an OEM genuine friction component engineered for the high-torque environments of construction machinery transmissions. This part functions as a primary holding brake within the planetary gearset, ensuring positive engagement and controlled deceleration under heavy loads. Positioned directly on the output shaft assembly, the SKU 4699.109.030 interfaces with the 4699101046 HOUSING to create a sealed braking chamber. When hydraulic pressure is applied, this brake pack locks the rotating elements, preventing unintended movement during loading, grading, or excavation operations. Its OEM specification guarantees dimensional accuracy and thermal stability required for continuous duty cycles in wheel loaders and dozers.
Symptoms of Failure
- Gradual loss of holding power on inclines – If the machine creeps forward when parked on a slope, the brake discs may be worn beyond service limits. This is a common long-tail search query for “ZF transmission brake slipping on hill.”
- Oil contamination from friction material debris – As the brake linings degrade, metallic and carbon particles enter the hydraulic circuit. Operators often search for “black sludge in transmission oil after brake failure.”
- Delayed engagement or soft pedal feel – When the brake pack no longer compresses fully, the operator experiences a spongy response. This symptom is frequently searched as “ZF brake not engaging immediately.”
- Audible grinding or chattering during braking – Worn steel plates or damaged friction surfaces produce a distinct noise, especially under partial load. Technicians search for “grinding noise from ZF transmission brake assembly.”
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4699.109.030 |
| Type | Friction Brake Pack (Wet) |
| Outer Diameter | 185 mm (estimated) |
| Inner Diameter | 110 mm (estimated) |
| Thickness (assembled) | 28 mm (estimated) |
| Material | Sintered Bronze on Steel Core |
| Weight | 1.8 kg (estimated) |
| OEM Reference | ZF 4699.109.030 |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This brake assembly is primarily used in ZF WG180, WG200, and WG310 series transmissions found in construction machinery such as Caterpillar, Volvo, and Komatsu wheel loaders. It also fits select ZF 4WG-200 and 6WG-200 variants. The part is designed to work with the 4699301109 HOUSING and the 4699301017 BEARING COVER to maintain proper axial clearance. For complete assembly, the 4699301085 COVER must be installed to protect the brake pack from external debris. Always verify your transmission model number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101046 | HOUSING | Encloses the brake pack and directs oil flow |
| 4699301109 | HOUSING | Secondary housing for output shaft support |
| 4699301017 | BEARING COVER | Seals bearing cavity and retains lubrication |
| 4699301085 | COVER | Protects brake assembly from contamination |
| 4699301014 | THREAD PROTECTIVE SHIELD | Prevents thread damage during installation |
| 0634303141 | O-RING | Hydraulic seal between housing and cover |
| 0734307407 | PROTECTION CAP | Covers exposed ports during transport |
| 0634309600 | SHAFT SEAL | Prevents oil leakage along the output shaft |
| 0637885612 | BREATHER | Equalizes pressure inside the transmission |
| 0636102023 | CAP SCREW | Fastens housing components with precise torque |
