Overview
The ZF 4143.151.012 MULTIDISK BRAKE is a critical friction component engineered for precise torque control within ZF HL 100 and HL 270 series transmissions. This OEM genuine part functions as a hydraulic holding brake, engaging multiple friction disks to stop or hold the output shaft under load. Located within the transmission’s clutch pack assembly, the SKU 4143.151.012 ensures smooth power interruption during gear shifts and stationary operations. Its robust design withstands high thermal stress, making it essential for heavy-duty industrial drivelines where reliability is non-negotiable.
Symptoms of Failure
- Delayed engagement or transmission slipping under load: Worn friction material on the 4143.151.012 reduces clamping force, causing the transmission to hesitate or lose torque during acceleration.
- Overheating and burnt oil smell: Excessive slippage from a degraded multidisk brake generates friction heat, leading to thermal breakdown of transmission fluid.
- Erratic shifting or harsh engagement: A failing brake pack cannot modulate pressure evenly, resulting in jarring gear changes or unintended neutral conditions.
- Metallic debris in the oil pan: Advanced wear on the steel separator plates produces fine metal particles, contaminating the hydraulic system.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.151.012 |
| Type | Multidisk Brake (Friction Pack) |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Friction Material | Sintered Bronze on Steel Core |
| Number of Disks | 6 (friction) + 6 (steel) |
| Weight | 1.8 kg (4.0 lbs) |
| OEM Reference | ZF 4143.151.012 |
Compatibility
This multidisk brake is specifically designed for ZF HL 100 and HL 270 series transmissions. It is also compatible with WG180, WG200, and WG250 models used in construction and agricultural machinery. The 4143.151.012 integrates directly with the 4143101022 HOUSING and 4143301044 HOUSING to form the brake assembly. For secure mounting, use the 0631329135 SPRING PIN and 0636302014 SCREW PLUG during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101022 | HOUSING | Encloses brake pack and directs oil flow |
| 4143301044 | HOUSING | Secondary housing for clutch/brake support |
| 0631329135 | SPRING PIN | Retains brake pack alignment |
| 0636302014 | SCREW PLUG | Seals hydraulic ports |
| 0634801057 | SEALING RING | Prevents fluid leakage between housings |
| 4143301053 | CONNECTING PART | Links brake assembly to transmission case |
| 0636100600 | CAP SCREW | Fastens housing components |
| 0636101024 | CAP SCREW | High-torque fastener for critical joints |
| 0730365159 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Locates and secures brake pack |
