Overview
The ZF 4657.103.420 OUTPUT for WG190 is a critical driveline component engineered to transfer torque from the transmission’s planetary gear set to the output shaft. As an OEM genuine part, it ensures precise alignment and load distribution within the WG 190 series. This output assembly sits directly behind the rear housing section, interfacing with the HOUSING REAR PART to seal the gear train. The SKU 4657.103.420 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty industrial transmissions.
Symptoms of Failure
- Oil leaks near the rear seal area: When the 4657.103.420 output wears, fluid can escape past the sealing surface, leaving visible drips under the transmission housing.
- Gear slipping under load: A degraded output can cause intermittent power loss or hesitation during acceleration, especially in WG190-equipped machinery.
- Abnormal vibration or noise: Worn splines or bearing surfaces on the output produce a rhythmic clunking or whining sound that intensifies with vehicle speed.
- Difficulty engaging reverse or low gears: Misalignment of the output assembly can prevent smooth engagement, often accompanied by a grinding sensation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.103.420 |
| Material | Case-hardened alloy steel (SAE 8620 equivalent) |
| Weight | 3.2 kg (7.05 lbs) |
| Overall Length | 215 mm |
| Spline Count | 21 (internal), 28 (external) |
| OEM Reference | ZF 4657.103.420 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This output is specifically designed for the ZF WG 190 series transmissions. It also fits select variants of the WG180 and WG200 models where the rear output housing shares the same bolt pattern and spline geometry. Always verify the TRANSMISSION HOUSING part number (4657101031) and the HOUS.FRONT SECT (4657201027) to confirm compatibility. The CYLINDRICAL PIN (0631306792) is used to align the output during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and supports the output assembly. |
| 4657201027 | HOUS.FRONT SECT | Front section of the housing that aligns with the input shaft and pump drive. |
| 4657201020 | HOUSING REAR PART | Rear housing segment that seals the output shaft and supports the bearing carrier. |
| 0631306792 | CYLINDRICAL PIN | Precision dowel pin used for alignment during assembly of housing sections. |
| 0636100801 | CAP SCREW | M10 hex-head fastener securing the output flange to the shaft. |
| 4656301148 | FIXING PLATE | Locking plate that prevents rotation of the output bearing nut. |
| 4657301032 | SCREEN SHEET | Fine mesh filter installed in the oil return passage to catch debris. |
| 4657301033 | SCREEN SHEET | Secondary filter screen for the lubrication circuit near the output area. |
| 0636100803 | CAP SCREW | M8 bolt used to attach the fixing plate to the housing. |
| 4681301040 | OIL FEED.HOUSG. | Housing that directs pressurized oil to the output shaft bearings. |
Frequently Asked Questions
Q: Can the 4657.103.420 output be used in a WG200 transmission?
A: Yes, it is compatible with WG200 models that share the same rear housing bolt pattern. However, you must also replace the HOUSING REAR PART if it shows wear.
Q: What torque should be applied to the cap screws when installing this output?
A: The M10 cap screws (part 0636100801) require 45 Nm (33 ft-lbs) of torque, while the M8 screws (0636100803) need 22 Nm (16 ft-lbs). Always use a torque wrench.
Q: How do I know if the output splines are worn?
A: Inspect the internal splines for a “shiny” or polished appearance, which indicates fretting. If you can rock the output shaft by hand more than 1 mm, replacement is necessary.
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Phone: +86 158 2286 3467 |
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