ZF 4143.151.020 MULTIDISK BRAKE | OEM Genuine Part

Overview

The ZF 4143.151.020 MULTIDISK BRAKE is a critical friction component engineered for precise torque interruption within the HL 100 and HL 270 series transmission assemblies. This OEM genuine part functions as a hydraulically actuated clutch pack, managing power flow during gear shifts and providing stationary braking capability. The SKU 4143.151.020 sits directly within the rotating drum assembly, where its steel and friction plates engage to lock or release planetary gear sets. For optimal sealing and structural integrity, this brake pack is housed within the 4143101044: HOUSING and the 4143301055: HOUSING, which together form the protective enclosure for the entire clutch system.

Symptoms of Failure

• Delayed or harsh engagement – When the multidisk brake wears, you may experience a noticeable lag or a jarring shift when selecting forward or reverse gears, often described as “transmission hesitation on startup.”
• Loss of holding power on inclines – A worn 4143.151.020 can cause the vehicle to creep or roll backward on slopes, even with the transmission in park or neutral, a classic sign of “park brake failure in ZF transmissions.”
• Darkened or burnt transmission fluid – Excessive friction material shedding from the brake plates contaminates the oil, producing a burnt smell and dark discoloration, commonly searched as “burnt ATF smell after hard use.”
• Intermittent gear slippage under load – During heavy acceleration or towing, the transmission may momentarily lose drive, indicating the brake pack cannot maintain clamping force, a symptom known as “ZF transmission slipping in high gear.”

Technical Specifications

Compatibility

This genuine ZF multidisk brake is primarily designed for the HL 100 and HL 270 series transmissions, which are commonly found in heavy-duty industrial vehicles and construction equipment. Based on its design and spline configuration, the 4143.151.020 is also compatible with the WG180, WG200, and WG250 transmission models. It is frequently used in ZF 4WG-180, 4WG-200, and 6WG-250 powertrains, where it serves as the forward clutch or reverse brake pack. The part interfaces directly with the 4143298040: CASE and is secured using the 0631329135: SPRING PIN to ensure precise alignment during assembly.

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