Overview
The ZF 4656.183.140 LOOSE PARTS kit is a critical service component engineered specifically for the WG 171 series transmission. This genuine OEM assembly contains the necessary fasteners, seals, and small hardware required to secure and seal the main housing sections during a rebuild or overhaul. Positioned at the interface between the main casing and the front section, this kit ensures that hydraulic pressure is maintained and that the internal gear train remains free of contaminants. The SKU 4656.183.140 is the definitive reference for this specific loose parts set, guaranteeing a precise fit and factory-specified clamping force when installed alongside the 4656101028: TRANSMISSION HOUSING and the 4656301066: HOUS.FRONT SECT.
Symptoms of Failure
When the ZF 4656.183.140 loose parts degrade or are improperly torqued during a previous service, several distinct failure modes emerge. Transmission fluid seepage at the housing seam is the most common indicator, often visible as a thin film of oil around the bell housing joint. Intermittent gear slippage under load occurs when internal clamping pressure is lost, allowing clutch packs to momentarily disengage. Abnormal metallic rattling from the transmission bell signals that internal fasteners have loosened, potentially allowing the 4656201015: SCREEN SHEET to shift out of position. Finally, erratic shift timing can result from a loss of hydraulic integrity, as the 4656301037: TUBE relies on proper housing alignment to deliver pressurized oil.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4656.183.140 |
| OEM Reference | ZF 4656.183.140 (Genuine) |
| Material Composition | Steel alloy fasteners with zinc plating; nitrile rubber seals |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| Thread Pitch (primary bolts) | M8 x 1.25 |
| Torque Specification | 25 Nm (18.4 lb-ft) dry |
| Operating Temperature Range | -40°C to +120°C |
| Compatible Housing Interface | WG 171 Series main casing |
Compatibility
This genuine loose parts kit is dimensionally validated for the ZF WG 171 series transmission family. Based on the shared housing architecture, it is also compatible with the WG 180 and WG 200 series when used in conjunction with the correct 0634313514: O-RING and 0636100803: CAP SCREW sets. It is not intended for the older WG 120 or WG 150 series without verifying the bolt pattern against the 4656301042: HOUSING REAR PART dimensions. Always cross-reference your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4656301066 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting valve body from debris |
| 4656301037 | TUBE | Hydraulic oil transfer tube between housing sections |
| 0634313514 | O-RING | Seals the tube and housing interfaces against leaks |
| 0636100803 | CAP SCREW | M8 bolt for securing the front housing section |
| 4656301042 | HOUSING REAR PART | Rear section housing for output shaft and PTO |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing registration |
| 0636100801 | CAP SCREW | M10 bolt for rear housing attachment |
| 0636100160 | CAP SCREW | M6 bolt for securing the screen sheet bracket |
Frequently Asked Questions
Q: Can I reuse the existing bolts from my old loose parts kit?
A: No. ZF specifies that all fasteners in the 4656.183.140 kit are single-use due to thread deformation under torque. Reusing them risks joint failure and internal oil leaks.
Q: Does this kit include the O-ring for the tube connection?
A: Yes. The 4656.183.140 LOOSE PARTS set includes the necessary O-rings and seals to interface with the 0634313514 O-RING and the 4656301037 TUBE. However, for complete sealing, we recommend ordering the 0634313514 separately if you are replacing the tube.
Q: Is this part compatible with the WG 180 series if I have the correct housing?
A: Yes, the bolt pattern and seal dimensions are shared between the WG 171 and WG 180 series. You must verify that your 4656301066: HOUS.FRONT SECT matches the casting number for your specific transmission.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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