Overview
The ZF 4656.199.021 LOOSE PARTS kit is a critical service component designed specifically for the WG 160 Series transmission. This genuine OEM assembly contains the essential fasteners, seals, and positioning elements required to secure the main transmission housing sections during rebuild or repair. The SKU 4656.199.021 is often sourced when performing a full overhaul, as it ensures that all loose hardware meets factory torque and material specifications. Without this kit, proper alignment between the TRANSMISSION HOUSING and the HOUS.FRONT SECT cannot be guaranteed, leading to premature wear.
Symptoms of Failure
When the loose parts in this kit degrade or are missing, operators often report oil leaks at the housing joint due to compromised sealing surfaces. Another common symptom is gear engagement hesitation or slipping caused by misalignment of the HOUSING REAR PART. Technicians also note abnormal vibration during load shifts when the retaining hardware for the HOUSING REAR PART becomes loose. Finally, difficulty in maintaining hydraulic pressure is a direct indicator that the fasteners in the 4656.199.021 kit have fatigued.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.199.021 |
| Material Composition | Hardened Steel / Alloy |
| Weight (estimated) | 0.45 kg (1.0 lb) |
| OEM Reference | ZF 4656.199.021 |
| Compatible Housing | WG 160 Series |
| Included Fasteners | Bolts, Pins, Plates |
Compatibility
This genuine ZF part is engineered for the WG 160 transmission family. Based on the part type and housing interface, it is also compatible with ZF WG 180 and WG 200 models when used in conjunction with the correct FIXING PLATE. For WG 150 and WG 250 variants, verify the bolt pattern against the CAP SCREW dimensions before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing |
| 4656201075 | HOUS.FRONT SECT | Front section housing |
| 4656201036 | HOUSING REAR PART | Rear section housing |
| 4472239179 | HOUSING REAR PART | Alternate rear housing |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel |
| 4656301148 | FIXING PLATE | Secures loose parts |
| 0636100817 | CAP SCREW | Fastener for housing |
| 4656301016 | SCREEN SHEET | Filter screen element |
| 4656301017 | SCREEN SHEET | Alternate filter screen |
| 0636100803 | CAP SCREW | Secondary fastener |
Frequently Asked Questions
Q: Can I reuse the original fasteners instead of buying the 4656.199.021 kit?
A: No. ZF specifies that all loose parts in this kit are single-use due to torque-to-yield requirements. Reusing them risks housing misalignment and oil leaks.
Q: Does this kit include the CYLINDRICAL PIN (0631306816)?
A: The 4656.199.021 kit contains the primary loose hardware, but the CYLINDRICAL PIN is a separate component often ordered together for complete alignment.
Q: How do I verify the correct CAP SCREW length for my WG 160?
A: Cross-reference the 0636100803 CAP SCREW against your housing depth. The kit includes standard lengths; use the SCREEN SHEET (4656301016) for gasket thickness verification.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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