Overview
The ZF 2095.352.029 PISTON is a critical hydraulic actuation component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part converts hydraulic pressure into mechanical force to engage clutch packs and shift gears within the planetary gearset. Positioned inside the transmission valve body and piston housing assembly, the 2095.352.029 PISTON ensures precise oil flow control and consistent clamping force during load changes. When paired with a properly functioning DIFFERENTIAL HOUSING, this piston maintains the integrity of the hydraulic circuit, preventing cross-leakage between clutch circuits. The SKU 2095.352.029 is machined to tight tolerances to match OEM specifications, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 2095.352.029 PISTON can cause sluggish shifts or abrupt clutch application, especially when the transmission is cold.
- Internal hydraulic oil leaks: Cracks or scoring on the piston surface allow pressurized fluid to bypass, leading to low line pressure and erratic shifting behavior.
- Gear slipping under load: Insufficient piston stroke reduces clutch pack clamping force, causing the transmission to slip during acceleration or hill climbing.
- Erratic shift timing: When the piston fails to return fully, it can cause overlapping clutch engagement, resulting in harsh or missed shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2095.352.029 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Outer Diameter | Approx. 85 mm |
| Inner Diameter | Approx. 40 mm |
| Height | Approx. 35 mm |
| Weight | 0.45 kg |
| OEM Reference | ZF 2095.352.029 |
| Seal Type | Integrated O-ring groove (seal sold separately) |
Compatibility
This ZF 2095.352.029 PISTON is specifically designed for the WG100, WG130, and WG131 transmission models. It is also compatible with certain variants of the WG180 and WG200 series when used in the same hydraulic circuit position. The piston works in concert with the DIFFERENTIAL assembly and the TAPER ROLLER BEARING to distribute load evenly. For applications requiring a secondary differential, the DIFFERENTIAL (part 2093209023) is a common companion part. Always verify your transmission model and serial number before ordering to ensure proper fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on rotating shafts |
| 2093209023 | DIFFERENTIAL | Secondary torque distribution unit |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses and protects differential gears |
| 0631329088 | SPRING PIN | Secures piston alignment within the bore |
| 5838300811 | THRUST WASHER | Reduces axial friction between rotating components |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at a right angle within the differential |
| 5838300633 | AXLE | Transmits rotational force to wheel hubs |
| 5838300753 | THRUST WASHER | Prevents metal-to-metal contact in gear sets |
| 5838300818 | THRUST WASHER | Provides wear surface for planetary gear thrust loads |
Frequently Asked Questions
Q: Can the 2095.352.029 PISTON be reused after a transmission overhaul?
A: It is not recommended. The piston surface can develop micro-cracks or wear patterns that compromise sealing. Always replace with a new OEM genuine part to ensure proper hydraulic pressure and shift quality.
Q: What tools are needed to install this piston?
A: Installation typically requires a piston ring compressor, a soft-faced mallet, and a torque wrench for the retaining bolts. Ensure the bore is clean and free of debris before insertion.
Q: Does this piston work with aftermarket seal kits?
A: While aftermarket seals may fit, we strongly recommend using OEM seals to match the piston’s groove dimensions and material compatibility. Incorrect seals can lead to premature failure or fluid contamination.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
