Overview
This OEM genuine ZF 2095.319.019 PISTON is a critical hydraulic actuation component engineered for the WG100, WG130, and WG131 transmission series. Positioned within the clutch pack assembly, this piston converts hydraulic pressure into mechanical force to engage and disengage gear sets. The SKU 2095.319.019 is precision-machined to factory tolerances, ensuring consistent clamping force and preventing premature clutch wear. When paired with a properly functioning 5838109012: DIFFERENTIAL, this piston maintains the hydraulic integrity required for smooth power transfer under heavy loads.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn piston seal causes hydraulic pressure loss, resulting in a noticeable lag or jarring shift when selecting drive or reverse.
- Internal transmission oil leaks: Cracks or scoring on the piston bore allow ATF to bypass the seal, leading to low fluid levels and puddling under the bell housing.
- Clutch pack slippage under load: Insufficient piston stroke prevents full clutch plate compression, causing the transmission to slip during acceleration or uphill driving.
- Erratic shift patterns: Fluctuating hydraulic pressure from a failing piston can cause the transmission to hunt between gears or skip shifts entirely.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 2095.319.019 |
| Material | Hardened alloy steel with nitrided surface |
| Outer Diameter | 95.0 mm |
| Inner Diameter | 62.5 mm |
| Height | 28.4 mm |
| Weight | 0.42 kg |
| Seal Groove Width | 4.2 mm |
| Operating Pressure Range | 8–18 bar |
Compatibility
This piston is specifically designed for the ZF WG100, WG130, and WG131 off-highway transmission families. It is a direct replacement for units used in heavy-duty wheel loaders, graders, and material handlers. The 2095.319.019 also shares dimensional compatibility with select WG180 and WG200 clutch packs, though verification of the piston bore depth is recommended. For complete differential rebuilds, always inspect the 2093209023: DIFFERENTIAL and the 5838300626: DIFFERENTIAL HOUSING for wear. Additionally, the 0750117075: TAPER ROLLER BEARING should be replaced concurrently to ensure proper shaft alignment and piston travel.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between axles |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on shafts |
| 2093209023 | DIFFERENTIAL | Secondary torque distribution unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Secures piston return spring assembly |
| 5838300811 | THRUST WASHER | Reduces axial friction between rotating parts |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at right angles |
| 5838300633 | AXLE | Transmits rotational force to wheels |
| 5838300753 | THRUST WASHER | Controls end-play in gear sets |
| 5838300818 | THRUST WASHER | Provides wear surface for planetary gears |
Frequently Asked Questions
Q: Can the ZF 2095.319.019 piston be reused if the seal is replaced?
A: While the piston itself is durable, we recommend replacement if the outer diameter shows scoring or if the anodized surface has worn through. Reusing a worn piston can lead to uneven seal wear and recurring hydraulic leaks.
Q: Is this piston compatible with synthetic ATF fluids?
A: Yes. The nitrided steel construction of part 2095.319.019 is fully compatible with Dexron III, Dexron VI, and ZF-approved synthetic transmission fluids. Always flush the system if switching fluid types.
Q: What torque specification applies to the piston retaining snap ring?
A: The snap ring groove does not require torque; however, ensure the ring is fully seated in its groove. The piston itself is not torqued—it floats hydraulically. The related 0631329088: SPRING PIN should be driven to a depth of 12.5 mm below the housing face.
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Phone: +86 158 2286 3467 |
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