Description
Eliminate external clutch linkage play and ensure millisecond-fast pneumatic/hydraulic clutch actuation across your commercial fleet with the genuine ZF Commercial Vehicle Concentric Clutch Actuator (CSC). Engineered specifically for heavy-duty commercial truck gearboxes, TraXon/AS Tronic automated manual transmissions (AMT), and transit bus powertrains, this OE-grade concentric slave cylinder combines a high-precision hydraulic piston cylinder and an integrated release bearing into a single bell-housing assembly. Hardened rubber piston seals, fluid leakage past internal bores, or thermal cylinder binding cause spongy clutch pedal feel, AMT shift fault codes, incomplete pressure plate disengagement, and sudden clutch actuation failure. This original ZF concentric actuator solves those transmission actuation failures directly. It features a lightweight aluminum or high-grade polymer housing, self-adjusting hydraulic travel, low-friction EPDM/FKM seals, and an integrated high-temperature release bearing to deliver precise clutch modulation, minimal hydraulic hysteresis, and uncompromised fleet reliability.
Technical Parameters
| Category | Specifications & Technical Details |
| Integrated Concentric Cylinder Architecture | We integrate the hydraulic / pneumatic working cylinder and release bearing coaxially onto the gearbox input shaft sleeve. This completely removes the traditional release fork, linkage rod, and external slave cylinder. As a result, it greatly improves transmission response speed. |
| Self-Adjusting Hydraulic Stroke System | The system automatically adjusts the internal piston base position according to natural wear of the clutch friction disc and pressure plate diaphragm spring. Therefore, release travel and pedal feel stay consistent throughout the entire clutch service life. |
| High-Performance Heat-Resistant Elastomer Seals | We use high-pressure-resistant FKM or EPDM sealing lips on the internal piston that resist brake fluid corrosion. Consequently, they prevent hydraulic oil leakage under high-frequency shifting pressure. |
| Lightweight Anodized Aluminum/Polymer Housing | We manufacture the housing from hard anodized aluminum alloy or heat-resistant reinforced engineering plastic. It offers outstanding corrosion resistance and inner-wall wear resistance. Moreover, it greatly reduces friction resistance on the moving piston. |
| Pre-Integrated Sealed Release Bearing | We press-fit a ZF OEM high-speed clutch release bearing directly onto the front of the kit, filled with long-life synthetic grease. It effectively absorbs axial vibration between the engine crankshaft and input shaft. |
Applicable Car Brands & Models
Common warning symptoms include:
Clutch Fluid Leakage Under Bell Housing: Hydraulic brake fluid drops or dark dampness visible dripping from the transmission bell housing drain hole.
Spongy or Sunken Clutch Pedal: Loss of hydraulic pressure causing the pedal to feel soft, stay near the floorboards, or fail to disengage gears completely.
AMT Transmission Fault Codes: Automated transmissions (like ZF TraXon) throwing clutch position or shift actuation fault codes on the dash cluster.
Hard Gear Grinding Noise: Inability to shift smoothly into gear due to the actuator failing to push the pressure plate diaphragm fingers far enough.
Premature failure is typically caused by contaminated hydraulic brake fluid (moisture or dirt damaging internal elastomer seals), thermal stress from continuous heavy stop-and-go driving, or improper bleeding procedure during installation.
Yes. Fleet technicians strongly recommend replacing the concentric clutch actuator whenever changing the clutch disc and pressure plate. Because the CSC is located inside the transmission bell housing, replacing it prevents costly repeat labor costs if an old seal fails shortly after a new clutch is installed.
Our 1-year warranty covers all internal hydraulic seal leakage, piston binding, housing cracking, pre-assembled release bearing failure, and non-artificial manufacturing defects under normal operating conditions. If an actuator fails within 12 months, we provide prompt replacement or warranty processing upon inspection.
