Overview
The ZF 4656.183.373 LOOSE PARTS set is a critical service kit designed for the WG 160 series transmission. This assembly contains the specific fasteners, seals, and positioning components required to secure the main transmission housing sections during rebuild or repair. The SKU 4656.183.373 directly corresponds to the OEM genuine loose parts package that interfaces with the internal clutch packs and valve body. When replacing the main structural castings, this kit ensures proper alignment and torque retention. It is frequently ordered alongside the TRANSMISSION HOUSING to guarantee a complete seal against fluid loss.
Symptoms of Failure
- Transmission fluid seepage at housing joints: When the loose parts (bolts and sealing elements) degrade, oil can weep from the mating surfaces between the HOUS.FRONT SECT and the main case, leaving visible drips on the bell housing.
- Abnormal gear engagement noise: Worn locating pins or loose fasteners allow micro-movement between the HOUSING REAR PART and the intermediate plate, causing a distinct clunking sound during shift transitions.
- Intermittent loss of hydraulic pressure: A compromised loose parts set can cause the HOUSING REAR SECTION to shift slightly, disrupting oil gallery alignment and leading to delayed clutch application.
- Vibration at highway speeds: If the retaining hardware fatigues, the entire transmission assembly can develop a resonant vibration that transfers through the driveline.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.183.373 |
| OEM Reference | ZF 4656.183.373 |
| Material Composition | Steel alloy with zinc plating (fasteners); Nitrile rubber (seals) |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Package Contents | Bolts, washers, dowel pins, sealing rings |
| Torque Specification | 45 Nm ± 5 Nm (housing bolts) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This loose parts kit is engineered for the ZF WG 160 series transmission. It is also compatible with the WG 180 and WG 200 models when used in conjunction with the correct housing variants. The kit is not suitable for the older WG 120 series due to different bolt patterns. Always verify that the CYLINDRICAL PIN included in this set matches the dowel hole diameter of your specific housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101055 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201076 | HOUSING REAR PART | Rear section for output shaft support |
| 4656298047 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retains bearing in housing bore |
| 0636100817 | CAP SCREW | M10 x 30mm hex head bolt |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil sump |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8 x 20mm flange bolt |
Frequently Asked Questions
Q: Can I reuse the old bolts from my WG160 when installing this loose parts kit?
A: No. The 4656.183.373 kit is designed as a one-time-use replacement. Original bolts can stretch and lose clamping force, leading to oil leaks at the housing joints.
Q: Does this kit include the gaskets for the housing sections?
A: This specific loose parts set contains fasteners and alignment pins only. For sealing surfaces, you must order the appropriate gasket set separately. The FIXING PLATE included in the kit helps secure the gasket in position during assembly.
Q: How do I verify that the 4656.183.373 is the correct kit for my transmission?
A: Check the casting number on the main housing. If it begins with “WG 160” or “WG 180”, this kit is compatible. Also confirm the CYLINDRICAL PIN diameter matches your housing dowel holes.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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