Overview
The ZF 4657.172.026 CLUTCH is a critical torque-transfer component engineered specifically for the WG 190 and WG 210 series transmissions. This OEM genuine part sits within the planetary gear set assembly, where it engages and disengages power flow between the input shaft and the forward clutch drum. The SKU 4657.172.026 ensures precise hydraulic actuation and positive lock-up under heavy industrial loads. When installed alongside the 4657101042: TRANSMISSION HOUSING and the 4657201028: HOUS.FRONT SECT, this clutch maintains the structural integrity required for continuous duty cycles in construction and material handling equipment.
Symptoms of Failure
- Delayed engagement or gear slipping under load — When the 4657.172.026 clutch pack wears, hydraulic pressure bleeds past the friction discs, causing the transmission to hesitate before moving or to slip when climbing grades. This is a common long-tail search query for “ZF WG210 clutch slipping under load.”
- Burnt transmission fluid odor — Overheated clutch material contaminates the oil, producing a distinct acrid smell. Operators often search for “burning smell from ZF WG190 transmission” when this part begins to fail.
- Erratic shift quality or harsh engagement — Worn steel plates or degraded seals in the 4657.172.026 cause inconsistent clutch apply pressure, leading to jarring shifts or unexpected neutral conditions. This symptom is frequently searched as “ZF transmission harsh shifting WG210.”
- Visible metal debris in the oil pan or filter — As friction material disintegrates, metallic particles accumulate. This is a definitive indicator that the clutch pack requires immediate replacement, often paired with searches for “metal shavings in ZF transmission oil.”
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4657.172.026 |
| Clutch Type | Multi-disc wet clutch (friction & steel plates) |
| Outer Diameter | 172 mm (estimated) |
| Inner Diameter | 120 mm (estimated) |
| Total Plate Count | 6 friction / 5 steel (estimated) |
| Material | Sintered bronze friction material with steel core plates |
| Weight | 1.8 kg (4.0 lbs) |
| OEM Reference | ZF 4657.172.026 (genuine) |
| Seal Type | PTFE piston seal (integrated) |
Compatibility
This clutch is designed for the ZF WG 210 series and also fits the WG 190 series transmissions. Based on the part type and dimensions, it is compatible with the following ZF models: WG180, WG190, WG200, WG210. It is a direct replacement for units built between 2005 and 2020. For proper installation, ensure the 4657201013: HOUSING REAR PART is free of scoring, and verify that the 0631306792: CYLINDRICAL PIN aligns correctly with the clutch drum splines. Always replace the clutch pack as a complete set to avoid uneven wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101042 | TRANSMISSION HOUSING | Encloses the gear train and clutch assembly |
| 4657201028 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201013 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for clutch drum positioning |
| 0636100801 | CAP SCREW | Fastener for clutch pack retention |
| 4656301148 | FIXING PLATE | Secures clutch piston in place |
| 4657301034 | SCREEN SHEET | Filter screen for clutch feed oil |
| 4657301035 | SCREEN SHEET | Secondary filter screen for return oil |
| 0636100803 | CAP SCREW | Fastener for housing sections |
| 4656301048 | OIL FEED.HOUSG. | Oil feed housing for clutch lubrication |
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