Overview
The ZF 4656.183.303 LOOSE PARTS kit is a critical service assembly designed specifically for the WG 160 series transmission. This genuine OEM part contains the essential loose components required to maintain the internal integrity of the gearbox, ensuring precise alignment and secure fastening of major sub-assemblies during a rebuild or overhaul. The SKU 4656.183.303 is typically installed as a set of fasteners, pins, and locating elements that interface directly with the main casing and its sections. Without this kit, the structural cohesion of the transmission is compromised, leading to misalignment under load.
Symptoms of Failure
When the components within the 4656.183.303 kit wear out or are lost during disassembly, operators will notice distinct operational issues. Transmission housing oil seepage is a primary indicator, as degraded fasteners cannot maintain the seal between the main case and the HOUS.FRONT SECT. Another common symptom is abnormal gear rattle or vibration during shifting, caused by the HOUSING REAR SECTION shifting out of tolerance. Technicians also report difficulty in torque retention on cap screws, leading to loose bellhousing bolts. Finally, intermittent gear slippage can occur when the TRANSMISSION HOUSING loses its rigid support from worn pins.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.183.303 |
| Kit Contents | Pins, Screws, Plates, Screens |
| Material Composition | Hardened Steel / Alloy Steel |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Compatible Housing | WG 160 Series Main Case |
| Associated Fastener | CAP SCREW (M10 x 30) |
| Sealing Component | SCREEN SHEET (Fine Mesh) |
Compatibility
This genuine ZF loose parts kit is engineered for the WG 160 transmission family. While its primary application is the WG160, the 4656.183.303 kit is also functionally compatible with the WG180 and WG200 series when used in conjunction with the correct HOUSING REAR PART. It is not recommended for the older WG120 series due to differences in bolt pattern geometry. Always verify the condition of the FIXING PLATE before installation to ensure proper load distribution across the mating surfaces.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101055 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201076 | HOUSING REAR PART | Rear section for output bearing support |
| 4656298047 | HOUSING REAR SECTION | Complete rear housing assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Locks fasteners in position |
| 0636100817 | CAP SCREW | Secures housing sections together |
| 4656301016 | SCREEN SHEET | Fine debris filtration mesh |
| 4656301017 | SCREEN SHEET | Coarse debris filtration mesh |
| 0636100803 | CAP SCREW | Secondary housing fastener |
Frequently Asked Questions
Q: Can I reuse the old loose parts from my WG160 instead of buying the 4656.183.303 kit?
A: ZF strongly discourages reusing these components. The kit contains single-use fasteners and pins that are torque-to-yield. Reusing them can lead to loosening and subsequent damage to the TRANSMISSION HOUSING.
Q: Does this kit include the cap screws for the rear section?
A: Yes, the 4656.183.303 kit includes the necessary CAP SCREW fasteners for both the front and rear housing sections, though the HOUSING REAR PART must be ordered separately if damaged.
Q: How do I verify the correct screen sheet orientation?
A: The kit includes both a fine and coarse SCREEN SHEET. The fine mesh (4656301016) always faces the pump suction side, while the coarse mesh (4656301017) faces the sump.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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