Overview
The ZF 4699.109.106 BRAKE PARTS assembly is a critical OEM genuine component designed to manage braking force within the final drive section of heavy-duty construction machinery transmissions. This part functions as a friction-based stopping mechanism, engaging directly with the planetary gear set to halt output shaft rotation under load. Specifically, the 4699.109.106 unit houses the friction discs and steel plates that create the clamping force necessary for controlled deceleration. It sits within the transmission housing, adjacent to the 4699101159: HOUSING and the 4699301254: HOUSING, forming a sealed brake pack assembly. This SKU is an OEM genuine replacement, ensuring exact fitment and hydraulic pressure tolerance for ZF powertrains in wheel loaders, graders, and excavators.
Symptoms of Failure
- Intermittent gear slipping during braking: When the 4699.109.106 brake discs wear thin, the transmission fails to hold torque, causing the machine to creep forward or backward even with the brake engaged.
- Hydraulic oil contamination with metallic debris: Worn friction material from this brake part sheds particles into the transmission fluid, visible as glitter in oil samples or on the dipstick.
- Delayed or spongy brake response: Internal seal degradation within the brake piston assembly leads to pressure loss, requiring deeper pedal travel or multiple actuations to stop the machine.
- Overheating transmission housing: Excessive drag from warped brake plates generates localized heat, often detectable near the 4699309123: HOUSING COVER area.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.109.106 |
| OEM Reference | ZF 4699.109.106 |
| Material | Sintered bronze friction discs / hardened steel reaction plates |
| Outer Diameter | 210 mm (8.27 in) |
| Inner Diameter | 145 mm (5.71 in) |
| Total Thickness (pack) | 38 mm (1.50 in) |
| Weight | 1.8 kg (3.97 lbs) |
| Hydraulic Pressure Rating | 18 bar (261 psi) max |
| Operating Temperature Range | -20°C to +120°C (-4°F to 248°F) |
Compatibility
This brake part is engineered for ZF WG series powershift transmissions commonly deployed in construction machinery. Based on its disc geometry and spline count, the 4699.109.106 is compatible with the following ZF models: WG180, WG200, WG210, and WG310. It also fits select variants of the ZF 4WG-200 and ZF 5WG-210 used in articulated dump trucks and crawler dozers. Always verify the number of friction plates against your existing brake pack before installation. For complete assembly, this part integrates with the 4699298049: HOUSING KIT which includes all necessary seals and snap rings.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101159 | HOUSING | Encloses the brake pack and directs hydraulic flow |
| 4699301254 | HOUSING | Secondary housing for clutch/brake support |
| 4699298049 | HOUSING KIT | Includes seals, gaskets, and snap rings for brake assembly |
| 4699309123 | HOUSING COVER | Seals the brake chamber and retains piston |
| 0636104255 | CAP SCREW | Fastens housing covers to transmission case |
| 0631306174 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0636302013 | SCREW PLUG | Seals hydraulic test ports in the brake circuit |
| 0501331653 | SCREW PLUG | Drain plug for brake housing cavity |
| 0634801038 | SEALING RING | Prevents oil leakage at plug interfaces |
| 0637885613 | BREATHER | Equalizes pressure inside the brake housing |
