Overview
The ZF 4656.197.004 TRANSPORT FASTENING is a critical OEM genuine securing component engineered specifically for the WG190 and WG210 series transmissions. This part functions as a dedicated locking mechanism that stabilizes internal assemblies during shipping and heavy-duty operation, preventing axial movement of the gearset. The SKU 4656.197.004 is precision-machined to interface directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, ensuring that the drivetrain remains rigidly aligned under extreme torque loads. Without this fastening, the transmission core can shift, leading to catastrophic misalignment.
Symptoms of Failure
- Transmission housing oil seepage: When the transport fastening fatigues, the seal between the HOUSING REAR PART and the main casing is compromised, causing slow but persistent fluid leaks around the mating flange.
- Intermittent gear slippage under load: A worn 4656.197.004 allows the shaft assembly to drift axially, resulting in partial gear disengagement during acceleration—often misdiagnosed as clutch wear.
- Abnormal vibration at highway speeds: Loose fastening permits micro-movements in the HOUSING REAR SECTION, creating a low-frequency rumble that intensifies with RPM.
- Difficulty shifting into reverse: Misalignment from a failed transport fastening can bind the selector mechanism, requiring excessive force to engage reverse gear.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.197.004 |
| Material | High-tensile steel, zinc-plated |
| Weight | 0.42 kg (0.93 lbs) |
| Thread Size | M12 x 1.75 |
| Overall Length | 48 mm |
| OEM Reference | ZF 4656.197.004 |
| Torque Spec | 85 Nm (62.7 ft-lbs) |
Compatibility
This OEM transport fastening is engineered for the ZF WG190 and WG210 series, but it also fits the WG180, WG200, and WG220 models due to shared housing bolt patterns. It is a direct replacement for the original factory-installed part and must be used with the CYLINDRICAL PIN and CAP SCREW to ensure proper alignment. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201166 | HOUS.FRONT SECT | Front section housing input shaft bearing |
| 4657201168 | HOUSING REAR PART | Rear housing covering output shaft |
| 4657298101 | HOUSING REAR SECTION | Extended rear section for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing attachment |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | High-strength bolt for rear housing |
Frequently Asked Questions
Q: Can I reuse the 4656.197.004 transport fastening after removal?
A: No. This is a one-time-use torque-to-yield fastener. Reusing it risks thread galling and loss of clamping force, which can lead to oil leaks or gear misalignment.
Q: Does this part require special tools for installation?
A: Yes. A calibrated torque wrench set to 85 Nm is mandatory. Additionally, the CYLINDRICAL PIN must be driven flush before tightening the fastening to prevent housing distortion.
Q: Will this fastening work on a ZF WG210 with a PTO unit?
A: Yes, but you must also inspect the FIXING PLATE and SCREEN SHEET for wear, as PTO loads increase stress on the entire fastening assembly.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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