Overview
This OEM genuine ZF 4656.183.394 LOOSE PARTS kit is a critical service assembly designed specifically for the WG 171 Series transmission. It contains the essential fasteners, seals, and small components required to secure and seal the main housing sections during a rebuild or overhaul. The SKU 4656.183.394 sits directly at the interface between the main transmission casing and the front section, ensuring that hydraulic pressure is maintained and that structural integrity is preserved under heavy load. Without this specific loose parts set, reassembly of the gearbox is incomplete, leading to immediate fluid loss or component misalignment.
Symptoms of Failure
When the components within the ZF 4656.183.394 LOOSE PARTS kit degrade or are missing, operators will notice distinct operational issues. The most common failure symptom is external oil seepage around the bell housing joint, often mistaken for a main seal leak. Another critical sign is intermittent gear slipping under moderate torque, caused by insufficient clamping force on the housing flanges. Technicians also report abnormal vibration at the transmission mount points, indicating that the loose parts have loosened over time. Finally, erratic shift timing during cold starts can occur if the internal tube alignment shifts due to worn fasteners from this kit.
Technical Specifications
| Part Number | 4656.183.394 |
| Product Type | Loose Parts Kit (Hardware & Seals) |
| Material | Steel (fasteners) / NBR (seals) |
| Weight | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4656.183.394 |
| Application | WG 171 Series |
Compatibility
While the 4656.183.394 is cataloged under the WG 171 Series, its hardware configuration is shared across several ZF heavy-duty transmissions. It is fully compatible with the WG 180 and WG 200 series, as well as the earlier WG 150 models that utilize the same housing bolt pattern. This kit is also required when servicing the WG 211 series if the front section has been replaced. Always verify the housing casting numbers before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101072 | TRANSMISSION HOUSING | Main casing that encloses the gear train |
| 4656301168 | HOUS.FRONT SECT | Front section housing for pump and clutch pack |
| 4656201015 | SCREEN SHEET | Filter screen for hydraulic fluid intake |
| 4656301037 | TUBE | Internal fluid transfer tube |
| 0634313514 | O-RING | Seals the tube connection |
| 0636100803 | CAP SCREW | Secures the front section to the housing |
| 4656301169 | HOUSING REAR PART | Rear section of the transmission casing |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for rear housing attachment |
| 0636100160 | CAP SCREW | Bolt for the screen sheet retention |
Frequently Asked Questions
Q: Can I reuse the old bolts from my WG171 instead of buying the 4656.183.394 kit?
A: No. ZF specifies that all fasteners in this loose parts kit are torque-to-yield and must be replaced to prevent housing distortion and oil leaks.
Q: Does this kit include the O-ring for the tube (part 4656301037)?
A: Yes. The 4656.183.394 kit contains the necessary seals, including the O-ring (0634313514), to properly seal the internal tube connection.
Q: Will this part work if I am also replacing the TRANSMISSION HOUSING (4656101072)?
A: Absolutely. This loose parts kit is specifically designed to be used in conjunction with a new or remanufactured TRANSMISSION HOUSING and HOUS.FRONT SECT (4656301168) during a full rebuild.
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Phone: +86 158 2286 3467 |
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