Overview
The ZF 4699.109.068 BRAKE PARTS assembly is a critical hydraulic-mechanical component engineered for the internal braking systems of heavy-duty construction machinery transmissions. This OEM genuine part functions as the primary friction interface within the clutch pack, converting hydraulic pressure into clamping force to halt output shaft rotation. Positioned within the planetary gear set of ZF power shift transmissions, the SKU 4699.109.068 directly manages torque interruption during directional shifts and emergency stops. Its precision-ground friction surfaces and steel backing plate ensure consistent engagement under extreme loads, making it indispensable for wheel loaders, graders, and excavators operating in demanding environments.
Symptoms of Failure
- Delayed or incomplete braking response — When the friction material wears below 0.5 mm, operators experience a noticeable lag between pedal input and machine deceleration, often described as “brake fade” during heavy loading cycles.
- Transmission oil contamination with metallic particles — Worn brake parts shed fine steel debris into the hydraulic circuit, visible as glitter in oil samples, which accelerates wear on adjacent 4699101113: HOUSING components.
- Intermittent gear slipping under load — Degraded friction coefficient causes the brake pack to lose clamping force, allowing the transmission to momentarily freewheel when climbing grades or pushing material.
- Audible grinding or squealing during braking — Metal-to-metal contact from complete friction material loss produces a high-pitched noise, often accompanied by vibration through the chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.109.068 |
| Material | Sintered bronze friction lining on hardened steel core |
| Outer Diameter | 198 mm ± 0.2 mm |
| Inner Diameter | 127 mm ± 0.1 mm |
| Thickness (new) | 4.5 mm ± 0.05 mm |
| Weight | 0.42 kg |
| OEM Reference | ZF 4699.109.068 |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This brake part is designed for ZF WG series transmissions commonly found in construction machinery. Verified compatible models include WG180, WG200, and WF220 series, as well as the 4WG-200 and 6WG-200 variants. It also fits select ERGO-POWER and POWERSHIFT 2 transmissions used in compact wheel loaders. For proper installation, this part must be paired with the 4699301201: HOUSING and 4699309202: HOUSING COVER to maintain correct piston clearance. Always secure the assembly using 0636101477: CAP SCREW torqued to 45 N·m.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101113 | HOUSING | Encloses the brake pack and directs oil flow |
| 4699301201 | HOUSING | Provides mounting surface for brake pistons |
| 4699309202 | HOUSING COVER | Seals the brake chamber and retains springs |
| 0636101477 | CAP SCREW | Fastens housing cover with precise torque |
| 0631302221 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0501319149 | SCREW PLUG | Closes oil passages for pressure testing |
| 0634801038 | SEALING RING | Prevents external oil leaks at joints |
| 0637885613 | BREATHER | Equalizes internal pressure during thermal cycling |
| 0730365801 | TYPE PLATE | Identifies transmission model and serial number |
| 0636302013 | SCREW PLUG | Seals drain port for maintenance access |
