Overview
The ZF 4681.102.003 INPUT shaft assembly is a critical drivetrain component engineered for the BP 210 and BP 230 series of powershift transmissions. This OEM genuine part serves as the primary torque transfer interface between the engine flywheel and the transmission’s internal gear train. Machined from high-tensile alloy steel, the input shaft ensures precise rotational alignment and distributes engine power efficiently under heavy load conditions. The SKU 4681.102.003 is a direct replacement unit, manufactured to ZF’s original factory tolerances to maintain driveline integrity and prevent premature wear on adjacent bearings and clutches.
Symptoms of Failure
When the ZF 4681.102.003 input shaft begins to degrade, operators typically notice these distinct warning signs:
- Oil seepage at the bell housing joint: Worn shaft seals or surface scoring allow transmission fluid to escape, leaving visible drips on the housing.
- Intermittent gear engagement hesitation: A worn spline profile causes delayed or rough shifting, particularly when transitioning between forward and reverse ranges.
- Audible metallic chattering under acceleration: Excessive axial play in the input shaft produces a distinct rattle or knock that intensifies with engine RPM.
- Vibration transmitted through the shift lever: An unbalanced or bent shaft creates harmonic vibrations felt directly in the operator station during loaded operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Overall Length | 285 mm (11.22 in) |
| Spline Diameter (Input End) | 32 mm (1.26 in) |
| Bearing Journal Diameter | 45 mm (1.77 in) |
| Material | Case-hardened 20MnCr5 alloy steel |
| Net Weight | 2.85 kg (6.28 lbs) |
| OEM Reference | ZF 4681.102.003 |
| Surface Treatment | Black oxide corrosion protection |
Compatibility
This genuine input shaft is validated for use in the following ZF transmission families. Cross-reference your unit’s serial plate before ordering.
- BP 210 Series – All variants including BP 210-1, BP 210-2, and BP 210-3
- BP 230 Series – Standard and heavy-duty configurations
- WG 180 Series – Early production models with 6-bolt input flanges
- WG 200 Series – Select models requiring a 32mm spline pilot
- WG 220 Series – Limited compatibility; verify shaft length against original part
Note: Always compare the spline count and pilot bearing recess depth with your existing component. The 4681.102.003 uses a 14-tooth involute spline profile.
