Overview
The ZF 0501.005.418 BRAKE CYLINDER is a critical hydraulic actuation component designed for heavy-duty construction machinery transmissions. This OEM genuine part converts hydraulic pressure into mechanical force to engage the brake pack within the transmission housing, ensuring precise stopping control and load holding under extreme operating conditions. The SKU 0501.005.418 identifies a direct replacement unit that meets ZF’s original manufacturing tolerances, eliminating the risk of premature wear associated with aftermarket alternatives. Positioned between the valve body and the clutch pack, this cylinder directly influences shift quality and machine safety during grading, digging, or hauling operations.
Symptoms of Failure
When the ZF 0501.005.418 begins to degrade, operators typically notice these specific failure modes:
- Hydraulic fluid seepage around the transmission bell housing – Internal seal degradation allows oil to bypass the piston, leaving visible drips on the undercarriage after shutdown.
- Delayed or incomplete brake engagement – The machine rolls forward on inclines or requires excessive pedal travel to stop, indicating insufficient cylinder stroke.
- Erratic gear engagement under load – The transmission may clunk or fail to hold a selected gear when the brake cylinder cannot maintain consistent clamping force.
- Contaminated hydraulic oil with metallic particles – Worn piston rings or cylinder bore scoring introduce debris that accelerates wear on the 2094104412: MAIN SHAFT and adjacent components.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 0501.005.418 |
| Bore Diameter | 50 mm |
| Stroke Length | 28 mm |
| Operating Pressure | 12–18 bar |
| Housing Material | High-tensile aluminum alloy |
| Piston Material | Hardened steel with PTFE coating |
| Seal Type | Viton dual-lip with dust wiper |
| Weight | 1.45 kg |
| Thread Size | M10 x 1.5 (inlet port) |
Compatibility
This brake cylinder is engineered for ZF’s heavy-duty powershift transmission series commonly found in construction loaders, dozers, and excavators. It directly fits the WG180, WG200, and WG250 models, as well as select variants of the WG310 series. The cylinder interfaces with the 2094304054: MAIN SHAFT to transfer braking torque, while the 2094106010: SHIFT SYSTEM controls its hydraulic timing. For machines equipped with a 2094206001: GEARSHIFT SHAFT, this cylinder ensures synchronized engagement during directional changes.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | Main Shaft | Transfers rotational torque from engine to gearset |
| 2094304054 | Main Shaft | Secondary torque carrier for auxiliary PTO drive |
| 2094106010 | Shift System | Hydraulic valve assembly controlling clutch pack timing |
| 2094206001 | Gearshift Shaft | Mechanical linkage for manual range selection |
| 2094306053 | Gearshift Shaft | Alternate spline length for WG200 transmissions |
| 0630513070 | Snap Ring | Secures piston assembly within cylinder bore |
| 2094306019 | Washer | Thrust washer for axial load distribution |
| 0732040444 | Compression Spring | Returns piston to neutral position after brake release |
| 0732040728 | Compression Spring | Higher rate spring for heavy-load brake applications |
| 2093206001 | Bush | Guide bushing for gearshift shaft alignment |
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