Overview
The ZF 4681.103.004 OUTPUT is a critical rotating assembly designed for the BP210, BP230, and WG190 series transmissions. This genuine OEM component serves as the primary power delivery interface, transferring torque from the planetary gear set to the driveline flange. Positioned at the rear of the transmission main case, the output shaft (SKU: 4681.103.004) works in concert with the TRANSMISSION HOUSING to maintain precise axial alignment. Its hardened steel construction ensures durability under continuous heavy-load operations in construction and agricultural machinery.
Symptoms of Failure
- Output shaft oil leakage at rear seal: Worn bearing journals on the 4681.103.004 allow radial movement, degrading the lip seal and causing transmission fluid to weep from the output flange area.
- Driveline vibration during acceleration: A damaged output shaft spline or bearing surface creates rotational imbalance, felt as a low-frequency shudder through the chassis under load.
- Intermittent gear slipping in reverse: When the output shaft bearing preload is lost, the planetary carrier can shift axially, causing momentary loss of torque transfer in high-torque reverse gears.
- Metallic debris in transmission fluid: Spalling on the output shaft raceways generates fine steel particles that contaminate the hydraulic system, often detected during routine oil analysis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4681.103.004 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Overall Length | 385 mm |
| Shaft Diameter (bearing journal) | 55 mm |
| Spline Pitch | 12/24 DP, 14-tooth involute |
| Weight | 4.8 kg |
| OEM Reference | ZF 4681.103.004 |
| Heat Treatment | Carburized & tempered to HRC 58-62 |
Compatibility
This genuine ZF output shaft is engineered for the BP210, BP230, and WG190 transmission families. It also directly replaces the unit in WG180 and WG200 models produced after 2012. The 4681.103.004 interfaces with the HOUS.FRONT SECT and the HOUSING REAR PART to form the complete rear driveline assembly. For WG210 variants, verify that the HOUSING REAR SECTION matches the 55mm bearing journal diameter before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101088 | TRANSMISSION HOUSING | Main structural case enclosing gear sets |
| 4657201183 | HOUS.FRONT SECT | Front section supporting input shaft bearings |
| 4657201184 | HOUSING REAR PART | Rear housing containing output shaft bore |
| 4657298111 | HOUSING REAR SECTION | Extended rear housing for WG series |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | M10 fastener securing output flange |
| 4681301015 | FIXING PLATE | Locking plate for output shaft nut |
| 4681301016 | SCREEN SHEET | Fine mesh filter for oil pump intake |
| 4681301017 | SCREEN SHEET | Coarse mesh pre-filter for return line |
| 0636100803 | CAP SCREW | M12 bolt for bearing retainer plate |
Frequently Asked Questions
Q: Can the 4681.103.004 output shaft be installed without replacing the rear housing?
A: Yes, provided the HOUSING REAR PART bearing bore is within factory tolerance. Measure the bore diameter at three points; if deviation exceeds 0.05 mm, replace the housing to prevent premature shaft wear.
Q: What torque specification applies to the output shaft retaining nut?
A: ZF specifies 320 Nm for the nut on the 4681.103.004, applied after seating the FIXING PLATE. Always use a new CAP SCREW when reassembling the flange.
Q: How do I identify a counterfeit 4681.103.004 output shaft?
A: Genuine ZF parts have a laser-etched part number on the shaft body near the spline end. Counterfeit units often lack the carburization depth mark and weigh approximately 200 g less than the specified 4.8 kg.
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