Overview
The ZF 4656.183.018 LOOSE PARTS kit is a critical service component designed specifically for the WG 160 series transmission. This assembly contains the essential fasteners, seals, and positioning elements required to secure the main transmission housing sections during rebuild or repair. As an OEM genuine part, the SKU 4656.183.018 ensures precise fitment and load distribution within the gearbox casing, preventing misalignment between the front and rear housing sections. This kit is typically deployed when replacing major structural components such as the TRANSMISSION HOUSING or the HOUS.FRONT SECT, ensuring that all loose hardware is replaced to factory torque specifications.
Symptoms of Failure
When the loose parts in the 4656.183.018 kit begin to fail, operators will notice specific performance degradation. Oil seepage at housing mating surfaces is the most common indicator, often appearing as a thin film of ATF around the bell housing joint. Transmission gear slippage under load occurs when fasteners loosen, allowing the HOUSING REAR PART to shift relative to the main case. Abnormal driveline vibration during acceleration signals that the locating pins have worn, causing radial play. Finally, intermittent loss of hydraulic pressure can result from cracked retaining plates that allow internal fluid passages to misalign.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4656.183.018 |
| OEM Reference | ZF 4656.183.018 |
| Material Composition | Steel alloy / hardened carbon steel |
| Weight (estimated) | 0.85 kg (1.87 lbs) |
| Package Contents | Fasteners, pins, retaining plates, seals |
| Thread Pitch | M8 x 1.25 (primary bolts) |
| Hardness Rating | HRC 32-38 |
Compatibility
This loose parts kit is engineered for the ZF WG 160 series, but its hardware dimensions also support the WG 180 and WG 200 transmissions when used in conjunction with the correct housing. The kit is specifically validated for use with the HOUSING REAR PART (4472239179) and the front section assemblies. It is not recommended for WG 120 or WG 150 models without cross-referencing bolt lengths.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4656201036 | HOUSING REAR PART | Rear housing section for output shaft support |
| 4472239179 | HOUSING REAR PART | Alternate rear housing variant for WG160 |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing centering |
| 4656301148 | FIXING PLATE | Retains bearing and shaft axial position |
| 0636100817 | CAP SCREW | M8 bolt for housing fastening |
| 4656301016 | SCREEN SHEET | Filter mesh for oil sump protection |
| 4656301017 | SCREEN SHEET | Secondary filter screen for hydraulic circuit |
| 0636100803 | CAP SCREW | M6 bolt for accessory mounting |
Frequently Asked Questions
Q: Can I reuse the original bolts from my old housing instead of buying the 4656.183.018 kit?
A: ZF engineering strongly discourages reusing fasteners. The bolts in this kit are torque-to-yield and lose clamping force after removal. Using new hardware prevents housing separation under high torque loads.
Q: Does this kit include the seals for the housing interface?
A: Yes. The 4656.183.018 LOOSE PARTS package contains the necessary O-rings and gaskets for the mating surfaces between the HOUS.FRONT SECT and the rear housing. Additional seals for the output shaft are not included.
Q: How do I verify I have the correct revision of this part for my WG160?
A: Check the stamped serial number on your transmission housing. The 4656.183.018 supersedes earlier revision A and B kits. If your housing has a date code after 2018, this is the correct service part.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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