Overview
The ZF 4143.151.018 MULTIDISK BRAKE is a critical friction component engineered for the HL 100 and HL 270 series transmission families. This OEM genuine part functions as a primary holding brake within the planetary gearset, engaging multiple friction disks to halt output shaft rotation under load. Positioned directly within the clutch pack assembly, the 4143.151.018 ensures precise torque interruption during gear shifts and stationary operations. The SKU 4143.151.018 is manufactured to ZF’s exacting tolerances, utilizing high-carbon steel reaction plates and sintered bronze friction linings to withstand extreme thermal cycling. When installed alongside the 4143101043: HOUSING, this multidisk brake forms a sealed hydraulic circuit that prevents cross-contamination between lubrication and actuation fluids.
Symptoms of Failure
- Delayed engagement or “brake drag”: Worn friction disks cause the transmission to hesitate when shifting from neutral to drive, often accompanied by a grinding noise during low-speed maneuvers.
- Intermittent oil leaks at the bell housing: Degraded sealing surfaces on the 4143.151.018 allow ATF to bypass the 4143301055: HOUSING, resulting in visible drips after extended operation.
- Gear slippage under load: When the multidisk brake fails to clamp fully, the transmission loses torque capacity, causing the vehicle to roll on inclines or surge during acceleration.
- Metallic debris in transmission fluid: Flaking friction material from the brake disks contaminates the hydraulic circuit, often detected during routine fluid analysis or filter inspection.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4143.151.018 |
| OEM Reference | ZF 4143.151.018 |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Diameter | 110 mm (4.33 in) |
| Friction Disk Thickness | 2.5 mm (0.098 in) |
| Material | Sintered bronze on steel core |
| Weight | 0.85 kg (1.87 lbs) |
| Number of Friction Surfaces | 8 |
| Max Operating Pressure | 18 bar (261 psi) |
| Temperature Range | -40°C to +150°C (-40°F to +302°F) |
Compatibility
This multidisk brake is validated for use in ZF WG180, WG200, and WG210 series transmissions, as well as the HL 100 and HL 270 series power take-off units. It directly replaces the original equipment part in the clutch pack assembly, which is secured by the 0631329135: SPRING PIN and housed within the 4143298040: CASE. The 4143.151.018 is also compatible with select ZF 4HP and 5HP automatic transmissions when used in auxiliary brake applications. Always verify the stack height and spline count against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101043 | HOUSING | Encloses the brake pack and directs hydraulic flow |
| 4143301055 | HOUSING | Secondary housing for clutch drum support |
| 4143298040 | CASE | Main transmission case housing the gearset |
| 0631329135 | SPRING PIN | Retains the brake piston in position |
| 0501214034 | SEALING CAP | Prevents fluid ingress into the brake chamber |
| 0636101024 | CAP SCREW | Secures the housing to the transmission case |
| 4475280099 | SCREW PLUG | Seals the hydraulic test port |
| 0634303266 | O-RING | Provides static seal between mating surfaces |
| 4143301045 | SCREEN SHEET | Filters debris from the brake actuation circuit |
| 0636420051 | COUNTERSUNK SCREW | Mounts the screen sheet to the housing |
