Overview
The ZF 4143.151.403 MULTIDISK BRAKE is a critical friction component engineered for precise torque control within ZF powershift transmissions. This OEM genuine part functions as a hydraulic clutch pack, engaging and disengaging gear sets to facilitate smooth directional shifts and load holding in heavy-duty industrial applications. Specifically designed for the HL 100 Series and HL 270 Series, this brake assembly ensures reliable stopping power under high thermal loads. The SKU 4143.151.403 is a direct replacement for worn factory units, restoring original shift quality and preventing driveline slippage during operation.
Symptoms of Failure
- Delayed or harsh gear engagement: When the multidisk brake wears, hydraulic pressure cannot properly clamp the friction plates, causing hesitation or abrupt shifts when moving from neutral to drive.
- Transmission overheating under load: Worn disks generate excessive heat due to slipping friction surfaces, often indicated by rising oil temperature gauges or burnt fluid odor.
- Loss of holding power on inclines: A failing 4143.151.403 brake pack allows the vehicle to creep or roll backward when parked on a grade, even with the transmission in gear.
- Metallic debris in transmission fluid: As friction material disintegrates, fine metal particles appear in the oil filter or drain pan, signaling imminent brake pack failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.151.403 |
| Type | Multidisk Brake / Clutch Pack |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Friction Plate Count | 6 steel + 5 friction (estimated) |
| Material | Sintered bronze on steel core |
| Weight | 1.8 kg (4.0 lbs) |
| OEM Reference | ZF 4143.151.403 |
| Operating Pressure | 18–22 bar (261–319 psi) |
Compatibility
This genuine ZF multidisk brake is primarily used in the HL 100 and HL 270 series transmissions. Based on its design and friction plate configuration, the 4143.151.403 also fits select WG180 and WG200 powershift models used in forklifts, wheel loaders, and telehandlers. Always verify your transmission serial number against the OEM parts catalog before installation. For complete rebuilds, pair this brake with the 4143101009: HOUSING and 4143301025: HOUSING to ensure proper alignment. Replace all 0634313603: O-RING seals and the 4475280018: SCREW PLUG during service to prevent fluid leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses the brake pack and directs hydraulic flow |
| 4143301025 | HOUSING | Outer carrier for clutch drum assembly |
| 0634313603 | O-RING | Seals piston bore to prevent pressure loss |
| 4475280018 | SCREW PLUG | Closes hydraulic test ports |
| 0501342341 | SUPPORT RING | Backs up O-ring under high pressure |
| 4143298457 | SEAL KIT | Contains all gaskets for brake overhaul |
| 0634313591 | O-RING | Seals housing joint faces |
| 0636101068 | CAP SCREW | Fastens housing sections together |
| 4143221013 | THROTTLE VALVE | Modulates clutch apply pressure |
| 0634304484 | O-RING | Seals valve body passages |
