Overview
The ZF 2093.352.076 PISTON is a critical hydraulic actuation component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part converts hydraulic pressure into precise mechanical force to engage clutch packs and shift elements within the valve body assembly. As a sealed, wear-resistant piston, it ensures consistent oil flow regulation and prevents cross-port leakage. The SKU 2093.352.076 is machined to exact ZF tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. When installed alongside a properly torqued 2094104412: MAIN SHAFT, this piston maintains the hydraulic integrity required for smooth gear engagement under high torque loads.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn piston seal causes internal pressure loss, leading to hesitation when shifting from neutral to drive or reverse.
- Transmission fluid leaks around the valve body: Cracks or scoring on the piston outer diameter allow ATF to bypass, leaving visible drips on the transmission housing.
- Intermittent gear slipping under load: When the piston cannot maintain clamping force on clutch packs, the transmission may momentarily lose power during acceleration.
- Erratic shift timing: A sticking piston disrupts hydraulic timing, causing the transmission to shift too early or too late, often accompanied by a flare in RPM.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 2093.352.076 |
| Material | Hardened alloy steel with PTFE seal coating |
| Outer Diameter | 52.4 mm |
| Inner Diameter | 28.6 mm |
| Height | 34.2 mm |
| Weight | 0.18 kg |
| OEM Reference | ZF 2093.352.076 |
| Surface Finish | Ground and polished, Ra ≤ 0.4 µm |
Compatibility
This piston is specifically designed for ZF WG-series powershift transmissions used in off-highway and construction equipment. It is a direct fit for the WG100, WG130, and WG131 models. While primarily intended for these three series, the 2093.352.076 may also be compatible with select WG180 and WG200 variants that share the same valve body architecture. Always verify piston bore diameter against your transmission’s service manual. For complete driveline restoration, pair this piston with a new 2094304054: MAIN SHAFT and inspect the 2094106010: SHIFT SYSTEM for wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | Main Shaft | Transfers torque from clutch packs to output gearset |
| 2094304054 | Main Shaft | Alternate spline configuration for WG130/WG131 |
| 2094106010 | Shift System | Hydraulic control module for gear selection |
| 2094206001 | Gearshift Shaft | Mechanical linkage between shift fork and piston |
| 2094306053 | Gearshift Shaft | Reinforced variant for high-cycle applications |
| 0630513070 | Snap Ring | Retains piston within cylinder bore |
| 2094306019 | Washer | Thrust washer for axial load distribution |
| 0732040444 | Compression Spring | Returns piston to neutral position |
| 0732040728 | Compression Spring | Higher spring rate for WG131 models |
| 2093206001 | Bush | Guides gearshift shaft through housing |
Frequently Asked Questions
Q: Can I reuse the old snap ring when installing this piston?
A: No. Always replace the 0630513070: SNAP RING with a new one. Reusing a snap ring risks piston ejection under pressure, causing catastrophic transmission damage.
Q: How do I know if my WG130 needs this piston or the entire shift system?
A: If you have hard shifting but no external leaks, start with the piston. If the issue persists after replacing the piston and inspecting the 2094206001: GEARSHIFT SHAFT, then replace the full 2094106010: SHIFT SYSTEM.
Q: Is this piston compatible with synthetic transmission fluids?
A: Yes. The PTFE seal coating is fully compatible with Dexron III, Mercon V, and ZF-approved synthetic ATF fluids. Avoid using fluids with friction modifiers that exceed ZF specification.
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Phone: +86 158 2286 3467 |
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