Overview
The ZF 4657.183.327 LOOSE PARTS for WG191 is a critical internal component kit designed for the WG 191 series transmission. This genuine OEM part, identified by SKU 4657.183.327, comprises the necessary loose hardware and fasteners that secure the transmission housing assembly. It sits directly within the main casing structure, ensuring that the TRANSMISSION HOUSING remains properly sealed and aligned with the HOUS.FRONT SECT and the HOUSING REAR PART. Without this kit, the structural integrity of the gearbox is compromised, leading to potential misalignment of internal shafts.
Symptoms of Failure
When the ZF 4657.183.327 LOOSE PARTS begin to degrade or are missing, operators will notice distinct operational issues. Common failure symptoms include:
- Transmission fluid seepage at casing joints: Worn or missing fasteners from this kit cause the housing sections to separate slightly, leading to oil leaks around the mating surfaces.
- Gear engagement hesitation or slipping: A loose housing assembly allows the CYLINDRICAL PIN to shift, disrupting precise gear alignment and causing delayed shifts.
- Abnormal vibration during load cycles: Without the correct loose parts securing the front and rear housings, the transmission experiences excessive play, translating into noticeable driveline vibration under heavy load.
- Increased noise from the bell housing area: A rattling or clunking sound often indicates that the retaining hardware has loosened, allowing internal components to move out of tolerance.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4657.183.327 |
| Material Composition | High-tensile steel with corrosion-resistant coating |
| Kit Contents | Fasteners, washers, and retaining clips |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| OEM Reference | ZF WG191 Series |
| Thread Pitch | M8 x 1.25 (primary bolts) |
Compatibility
This genuine ZF 4657.183.327 LOOSE PARTS kit is engineered specifically for the WG 191 transmission series. It is also compatible with the WG180 and WG200 series models that share the same housing architecture. The kit works in conjunction with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to ensure a precise fit. Always verify your transmission model suffix before ordering, as variations exist between WG191, WG192, and WG193 variants.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657301130 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657301131 | HOUSING REAR PART | Rear section of the transmission housing |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing sections |
| 0636102489 | CAP SCREW | Secures housing to bell housing |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 0636102463 | CAP SCREW | Fastener for rear housing attachment |
| 4657201133 | SCREEN SHEET | Filter screen for oil return |
| 0636115287 | CAP SCREW | Bolt for oil pan attachment |
| 4657301065 | PLATE | Spacer plate for valve body |
Frequently Asked Questions
Q: Can I reuse the existing fasteners instead of buying the 4657.183.327 kit?
A: No. ZF specifies that all loose parts in this kit are single-use due to torque-to-yield requirements. Reusing them risks fastener fatigue and housing separation.
Q: Does this kit include the CYLINDRICAL PIN for alignment?
A: The 4657.183.327 kit includes the primary fasteners and washers. The CYLINDRICAL PIN (0631306816) is a separate component that must be ordered individually if needed.
Q: Will this part work on a ZF WG180 transmission?
A: Yes, the WG180 and WG191 share the same housing bolt pattern. However, always verify your specific model number to ensure the HOUS.FRONT SECT matches your unit.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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