Overview
The ZF 4657.103.421 OUTPUT for WG190/WG210/WG211 is a critical driveline component engineered to transfer rotational force from the transmission’s planetary gearset to the output flange or driveshaft. Positioned at the rear of the gearbox housing, this OEM genuine part ensures precise torque delivery and minimal power loss under heavy-duty cycles. The SKU 4657.103.421 is machined from high-strength alloy steel to withstand continuous loads in construction, agricultural, and material-handling equipment. When paired with a robust TRANSMISSION HOUSING, this output shaft maintains concentric alignment and reduces vibration across the entire powertrain.
Symptoms of Failure
- Oil seepage at the rear seal area – Worn splines or bearing journals on the 4657.103.421 can cause seal misalignment, leading to gradual fluid loss and eventual gearbox starvation.
- Driveline shudder during acceleration – Excessive play in the output splines creates a momentary lag between engine speed and wheel rotation, often described as a “clunk” or vibration under load.
- Metallic debris in transmission fluid – Flaking or spalling on the hardened surface of the output shaft introduces ferrous particles into the oil, accelerating wear on adjacent components like the HOUS.FRONT SECT and planetary gears.
- Intermittent gear slipping in higher ranges – A fatigued output shaft can distort under torque, causing the speed sensor tone ring to generate erratic signals that confuse the TCU.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.103.421 |
| Overall Length | 412 mm (estimated) |
| Spline Diameter | 48 mm (output end) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 3.85 kg |
| OEM Reference | ZF 4657.103.421 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This output shaft is designed for ZF’s WG series powershift transmissions, specifically the WG190, WG210, and WG211 models. It also fits select variants of the WG180 and WG200 when used with the correct HOUSING REAR PART. Always verify the spline count and pilot bearing bore against your transmission’s serial number before installation. The 4657.103.421 is not compatible with the older WG120 or WG150 series without adapter modifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing that supports the output shaft and gearset |
| 4657201027 | HOUS.FRONT SECT | Front section housing that aligns the input shaft and pump drive |
| 4657201012 | HOUSING REAR PART | Rear housing that encloses the output bearing and seal assembly |
| 0631306792 | CYLINDRICAL PIN | Dowel pin for precise alignment between housing sections |
| 0636100801 | CAP SCREW | M12 bolt securing the output flange to the shaft |
| 4656301148 | FIXING PLATE | Locking plate that prevents output nut rotation |
| 4657301032 | SCREEN SHEET | Fine mesh filter protecting the output shaft oil gallery |
| 4657301033 | SCREEN SHEET | Alternate micron-rated filter for high-debris environments |
| 0636100803 | CAP SCREW | M10 bolt for securing the rear housing cover |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil delivery tube to the output shaft bearing |
Frequently Asked Questions
Q: Can the 4657.103.421 be reused if the splines show minor wear?
No. ZF specifies that any measurable spline wear beyond 0.2 mm requires replacement. Reusing a worn output shaft will damage the mating HOUSING REAR PART and cause premature bearing failure.
Q: Does this output shaft include the speed sensor tone ring?
No. The tone ring is a separate service item. The 4657.103.421 is supplied as a bare shaft. You must transfer the existing tone ring or order a new one if damaged.
Q: What torque specification is required for the output flange nut?
ZF recommends 280 Nm + 90° turn for the M24 nut, using a new CAP SCREW and FIXING PLATE each time.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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