Overview
The ZF 4657.303.013 WASHER is a precision-engineered OEM genuine component designed for the WG 190 and WG 210 series transmissions. This hardened steel washer functions as a critical load-spreading and axial clearance control element within the planetary gear set assembly. It sits between rotating shafts and stationary housings, ensuring proper preload and preventing metal-on-metal contact under high torque conditions. The SKU 4657.303.013 is manufactured to ZF’s exacting tolerances, guaranteeing a perfect fit and long service life in heavy-duty industrial drivetrains.
Symptoms of Failure
- Transmission oil leaks near the output flange: A worn or collapsed washer can allow the shaft to shift, breaking the seal between the 4656101037: TRANSMISSION HOUSING and the rotating assembly, leading to visible fluid seepage.
- Gear slipping under load: When the washer loses its original thickness, axial play increases, causing the clutch packs to lose clamping force. This results in intermittent power loss during acceleration or uphill operation.
- Metallic grinding noise from the bell housing: A fractured or excessively worn washer allows direct contact between the gear hub and the 4656201075: HOUS.FRONT SECT, producing a distinct high-pitched grinding sound during gear engagement.
- Vibration in neutral or park: Uneven washer wear creates imbalance in the planetary carrier, transmitting noticeable vibrations through the chassis when the transmission is idling.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.303.013 |
| Material | Hardened Carbon Steel (C45E) |
| Outer Diameter | 42.0 mm |
| Inner Diameter | 28.5 mm |
| Thickness | 2.5 mm |
| Weight | 0.012 kg |
| OEM Reference | ZF 4657.303.013 |
| Surface Finish | Phosphate coated (anti-corrosion) |
Compatibility
This washer is a direct fit for the ZF WG 160, WG 190, and WG 210 series transmissions. It is also compatible with the WG 180 and WG 200 variants where the planetary carrier interfaces with the 4656201035: HOUSING REAR PART. For applications using the updated 4472239178: HOUSING REAR PART, verify axial clearance during installation, as the revised housing geometry may require a stack of two washers to achieve proper preload.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and supports the washer assembly. |
| 4656201075 | HOUS.FRONT SECT | Front section housing that aligns the input shaft and provides the mating surface for the washer. |
| 4656201035 | HOUSING REAR PART | Rear housing component that positions the output shaft and counters the axial load from the washer. |
| 4472239178 | HOUSING REAR PART | Updated rear housing variant with reinforced bearing seat for higher torque applications. |
| 0631306816 | CYLINDRICAL PIN | Alignment pin that indexes the washer to prevent rotation during operation. |
| 4656301148 | FIXING PLATE | Retaining plate that secures the washer and pin in position within the housing. |
| 0636100817 | CAP SCREW | M8 bolt used to fasten the fixing plate to the transmission housing. |
| 4656301016 | SCREEN SHEET | Fine mesh filter that protects the washer area from debris in the oil circuit. |
| 4656301017 | SCREEN SHEET | Alternate mesh filter with larger openings for high-flow oil systems. |
| 0636100803 | CAP SCREW | M6 bolt for securing the screen sheet assembly to the housing. |
Frequently Asked Questions
Q: Can I reuse the old washer if it looks undamaged?
A: No. The ZF 4657.303.013 washer is a single-use component. Even if it appears intact, the material may have work-hardened or compressed beyond its elastic limit, leading to premature failure. Always install a new washer during any transmission rebuild.
Q: How do I know if I need one or two washers for my WG 210?
A: Measure the axial clearance between the planetary carrier and the 4656201035: HOUSING REAR PART. If the gap exceeds 0.15 mm, stack two washers. For the 4472239178: HOUSING REAR PART, always use a single washer as the revised casting reduces the required clearance.
Q: What torque should I apply to the cap screws securing the fixing plate?
A: Tighten the 0636100817: CAP SCREW to 25 Nm and the 0636100803: CAP SCREW to 12 Nm. Over-torquing can distort the washer and cause binding.
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