Overview
The ZF 4656.183.370 LOOSE PARTS for WG171 is a critical internal component kit designed to maintain the hydraulic integrity and shifting precision of your ZF WG 171 transmission. This genuine OEM part, identified by SKU 4656.183.370, sits within the valve body and clutch pack assembly, where it governs fluid routing and pressure regulation. Without this specific loose parts set, the transmission cannot achieve proper gear engagement or maintain consistent oil flow. It is often replaced in conjunction with the TRANSMISSION HOUSING to ensure a sealed, debris-free environment for the internal components.
Symptoms of Failure
When the 4656.183.370 loose parts begin to degrade, operators typically notice three distinct failure modes. First, intermittent gear slipping under load occurs as the parts lose their ability to maintain clutch pack pressure. Second, delayed or harsh shifting between forward and reverse gears becomes common, often accompanied by a metallic clunk. Third, external oil seepage around the valve body cover indicates that the seals within this kit have hardened or cracked. If you observe these symptoms, inspect the HOUS.FRONT SECT for scoring or warping that may have accelerated the wear.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number / SKU | 4656.183.370 |
| OEM Reference | ZF WG171 Series |
| Material Composition | Steel alloy with nitrile seals |
| Estimated Weight | 0.45 kg (1.0 lb) |
| Dimensions (L x W x H) | 85 mm x 45 mm x 30 mm |
| Operating Temperature Range | -40°C to +120°C |
| Hardness Rating | HRC 38-42 |
Compatibility
This genuine ZF 4656.183.370 loose parts kit is engineered primarily for the WG 171 transmission series. However, due to shared internal architecture, it is also compatible with the WG 180, WG 200, and select WG 150 variants that utilize the same valve body configuration. Always verify the part number against your transmission’s serial plate before installation. For a complete rebuild, pair this kit with the SCREEN SHEET to filter contaminants and the TUBE to restore proper fluid channeling.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Encloses and protects all internal gear and clutch assemblies |
| 4656301066 | HOUS.FRONT SECT | Front section housing that supports input shaft and pump |
| 4656201015 | SCREEN SHEET | Filters hydraulic fluid to prevent debris from entering valve body |
| 4656301037 | TUBE | Routes pressurized oil between valve body and clutch packs |
| 0634313514 | O-RING | Seals fluid connections to prevent external leaks |
| 0636100803 | CAP SCREW | Secures housing sections with precise torque tolerance |
| 4656301042 | HOUSING REAR PART | Rear housing section that supports output shaft and bearings |
| 0631306816 | CYLINDRICAL PIN | Aligns housing halves during assembly for precise fit |
| 0636100801 | CAP SCREW | Fastens valve body components with corrosion-resistant coating |
| 0636100160 | CAP SCREW | High-strength fastener for clutch pack retention |
Frequently Asked Questions
Q: Can I install the 4656.183.370 loose parts without replacing the transmission housing?
A: Yes, but only if the existing housing shows no cracks or warping. We strongly recommend inspecting the TRANSMISSION HOUSING for damage, as worn housing bores can cause premature failure of the new loose parts.
Q: How do I know if this part fits my specific WG171 transmission?
A: Verify the serial number on your transmission’s data plate. The 4656.183.370 is designed for WG171 units built after 2010. For older units, cross-reference with the HOUS.FRONT SECT part number to confirm compatibility.
Q: What other seals should I replace when installing this kit?
A: It is best practice to replace all O-rings and gaskets in the valve body area. The O-RING (0634313514) and both CAP SCREW types (0636100803 and 0636100801) are commonly ordered together to ensure a leak-free rebuild.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
