Overview
The ZF 2093.352.084 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 or clutch drum assembly, the piston creates a sealed chamber that, when pressurized, moves to clamp friction discs. The SKU 2093.352.084 is precision-machined to maintain exact tolerances, ensuring consistent shift quality and preventing internal fluid bypass. When rebuilding a ZF powershift transmission, this piston often works in concert with the 5838109012: DIFFERENTIAL to manage torque distribution, and its proper sealing is essential for maintaining system pressure.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn piston seal causes slow pressure buildup, resulting in a noticeable lag when shifting from neutral to drive or reverse.
- Internal transmission oil leaks: Cracks or scoring on the piston surface allow ATF to bypass, leading to low line pressure and visible drips from the bell housing area.
- Gear slipping under load: When the piston cannot hold full clamping force, the transmission slips during acceleration, especially in higher gears.
- Erratic shift patterns: A sticking piston causes intermittent pressure spikes, making the transmission hunt between gears or produce jarring shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 2093.352.084 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Outer Diameter | 84 mm (estimated) |
| Inner Diameter | 52 mm (estimated) |
| Height | 28 mm (estimated) |
| Weight | 0.45 kg (1.0 lb) |
| OEM Reference | ZF 2093.352.084 |
| Seal Type | Integrated O-ring groove (O-ring sold separately) |
Compatibility
This piston is specifically engineered for ZF WG-series powershift transmissions used in industrial and agricultural machinery. It is a direct fit for the following models: WG100, WG130, and WG131. While primarily designed for these three series, the piston may also be compatible with certain variants of the WG180 and WG200 when used in clutch pack assemblies with identical bore dimensions. Always verify piston diameter and stroke against your transmission’s service manual. For complete drivetrain rebuilding, pair this piston with the 0750117075: TAPER ROLLER BEARING to support rotating shafts, and the 2093209023: DIFFERENTIAL for final drive assembly. The 5838300626: DIFFERENTIAL HOUSING encloses these components and must be inspected for wear during piston replacement.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between axles; works with piston-driven clutches |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on transmission shafts |
| 2093209023 | DIFFERENTIAL | Secondary differential unit for multi-axle drive systems |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures piston return springs to the clutch drum |
| 5838300811 | THRUST WASHER | Reduces friction between rotating gear faces |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at a 90-degree angle within the differential |
| 5838300633 | AXLE | Transmits rotational force from differential to wheels |
| 5838300753 | THRUST WASHER | Controls end-play in the differential carrier |
| 5838300818 | THRUST WASHER | Provides wear surface for planetary gear thrust loads |
Frequently Asked Questions
Q: How do I know if my ZF WG100 needs a new 2093.352.084 piston?
A: Perform a pressure test on the clutch circuit. If the pressure reading is 15% below specification and you see ATF contamination in the breather, the piston seal is likely compromised. Also inspect the piston bore for scoring.
Q: Can I reuse the old piston if I only replace the O-ring?
A: ZF recommends replacing the piston whenever the transmission is opened for clutch service. The 2093.352.084 piston surface can develop micro-cracks from hydraulic cycling that are invisible to the naked eye, leading to premature failure if reused.
Q: Is this piston compatible with the ZF WG180 transmission?
A: While the WG180 uses a similar piston design, the bore diameter differs slightly. You must measure your clutch drum inner diameter. If it measures 84 mm, this piston will fit; if larger, use the WG180-specific part.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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