4C117C559AG Central Concentric Hydraulic Clutch Slave Cylinder Unit

CRB-022

The 4C117C559AG Central Concentric Hydraulic Clutch Slave Cylinder Unit is a compact hydraulic component that sits inside the clutch housing of certain manual transmission vehicles. It combines the functions of a traditional clutch release bearing and a hydraulic slave cylinder into one single unit. 

This unit is built as a direct-fit replacement for the original equipment part. It is designed for commercial vans, pickups, and passenger vehicles that use the same clutch system layout. The housing is typically made from durable plastic or aluminium, with a precision bearing surface and a hydraulic connection that matches factory specifications.

Core Functions
The main job of this unit is to convert hydraulic pressure into the mechanical force needed to disengage the clutch. It does this quickly and consistently every time the pedal is pressed.
Key working points include:
1. Receiving brake fluid under pressure from the clutch master cylinder
2. Moving the internal piston and bearing forward to push the clutch pressure plate
3. Returning smoothly when the pedal is released so the clutch re-engages
Maintaining proper alignment around the transmission input shaft
Because the 4C117C559AG Central Concentric Hydraulic Clutch Slave Cylinder Unit is concentric, it applies force evenly around the diaphragm spring. This reduces uneven wear and helps keep clutch operation consistent over long service life.

Purchase Motivation
B2B buyers such as parts distributors, fleet maintenance companies, and independent workshops choose this unit for several practical reasons. First, it is a high-demand replacement part for popular commercial platforms including Ford Transit Mk5 and Mk6 vans and minibuses, Ford Galaxy and S-Max MPVs, Ford Mondeo Mk4, and Mazda BT-50 pickups. Stocking it reduces the need to source multiple separate numbers.

Second, the concentric design shortens repair time. Technicians no longer need to remove external linkages or adjust a traditional fork. The unit bolts directly into the transmission bell housing with three mounting points and connects via a simple hydraulic plug.

Third, consistent quality and correct OE interchangeability lower the risk of returns. When a vehicle comes in with clutch drag, hard pedal feel, or fluid leaks at the transmission, this single component often solves the problem without further diagnosis of external parts.

Finally, the 4C117C559AG Central Concentric Hydraulic Clutch Slave Cylinder Unit supports both solid flywheel and dual-mass flywheel applications, giving buyers wider coverage with one SKU.