Overview
The ZF 4699.109.062 BRAKE PARTS component is a critical internal assembly unit designed for heavy-duty construction machinery transmissions. This OEM genuine part functions as a friction-based stopping mechanism within the planetary gear set, converting hydraulic pressure into mechanical clamping force to halt output shaft rotation. Positioned directly inside the transmission housing, it interfaces with the 4699101070: HOUSING to ensure precise alignment during high-torque braking events. The SKU 4699.109.062 is engineered to withstand extreme thermal cycling and abrasive contaminants common in excavators, loaders, and graders. Without this brake assembly, the transmission cannot maintain stationary loads on inclines or execute controlled deceleration during material handling operations.
Symptoms of Failure
- Delayed engagement when shifting to park or neutral – Operators notice a 2–3 second lag before the machine stops rolling, indicating worn friction surfaces inside the 4699.109.062 assembly.
- Intermittent brake chatter under load – A rhythmic vibration or grinding noise during low-speed maneuvering suggests degraded brake discs or contaminated hydraulic fluid.
- Visible oil seepage around the transmission bell housing – Leaks often originate from the brake piston seal, allowing ATF to bypass the 0634801038: SEALING RING and accumulate on external surfaces.
- Gradual loss of holding power on slopes – The machine creeps forward or backward when parked on a 10% grade, a classic sign of insufficient clamping force from the brake pack.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4699.109.062 |
| OEM Reference | ZF 4699.109.062 |
| Material | Sintered bronze friction discs with steel separator plates |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Diameter | 120 mm (4.72 in) |
| Overall Height | 42 mm (1.65 in) |
| Weight | 1.85 kg (4.08 lbs) |
| Operating Pressure | 12–18 bar (174–261 psi) |
| Max Torque Capacity | 2,450 Nm (1,807 ft-lb) |
Compatibility
This brake component is engineered for ZF WG series powershift transmissions commonly deployed in construction machinery. Verified compatible models include the WG180, WG200, WG210, and WG250 series. It also fits select variants of the ZF 4WG-200 and 6WG-250 torque converter transmissions. The 4699.109.062 mounts directly to the 4699301146: HOUSING and is secured by the 0636101411: CAP SCREW fasteners. For complete assembly, the 4699309085: HOUSING COVER must be installed over the brake pack to prevent debris ingress. Always verify your transmission serial number against ZF application charts before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101070 | HOUSING | Encloses the brake assembly and aligns planetary gears |
| 4699301146 | HOUSING | Intermediate housing supporting brake piston travel |
| 4699309085 | HOUSING COVER | Seals the brake chamber and retains lubrication oil |
| 0636101411 | CAP SCREW | Secures housing halves with precise torque rating |
| 0631302212 | CYLINDRICAL PIN | Aligns brake pack components during assembly |
| 0634801038 | SEALING RING | Prevents hydraulic fluid leakage past the brake piston |
| 0501319149 | SCREW PLUG | Closes pressure test ports in the brake circuit |
| 0637885613 | BREATHER | Equalizes internal pressure and vents moisture |
| 0730365801 | TYPE PLATE | Provides serial number and model identification |
| 4699102130 | INPUT | Transfers engine torque to the brake assembly |
