Overview
This OEM genuine ZF 4657.183.132 LOOSE PARTS kit is a critical service component designed specifically for the WG 191 series transmission. It contains the essential fasteners, seals, and small hardware required to secure internal assemblies during a rebuild or overhaul. The SKU 4657.183.132 sits within the valve body and clutch pack region, ensuring that pressure plates and pistons remain correctly torqued under high-load conditions. Without these loose parts, the transmission cannot maintain its structural integrity, leading to premature wear of adjacent components like the 4657120005: PRESSURE REGULATOR and the 0501211384: VALVE.
Symptoms of Failure
When the 4657.183.132 loose parts begin to degrade, operators will notice distinct performance issues. Intermittent gear slippage under load is a primary indicator, often caused by loose fasteners allowing clutch packs to separate. Another common symptom is erratic hydraulic pressure fluctuations, which can be traced back to failing retaining rings or bolts that compromise the valve body seal. You may also detect metallic debris in the transmission fluid from worn hardware, alongside audible rattling or knocking from the bell housing during gear changes. These failure modes directly impact the 0630532183: INDENTED RING and the 4656306145: PISTON, accelerating their wear.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4657.183.132 |
| Material | Hardened steel / alloy composite |
| Weight (approx.) | 0.45 kg (1.0 lb) |
| OEM Reference | ZF 4657.183.132 |
| Dimensions | 120 mm x 80 mm x 25 mm |
| Finish | Zinc-plated / phosphate coating |
Compatibility
This genuine ZF part is engineered for the WG 191 series, but it also cross-references with several other ZF heavy-duty transmissions. It is compatible with the WG 180, WG 200, and WG 210 models due to shared valve body and clutch housing architectures. Additionally, it fits select Ecomat 4HP and 5HP variants that utilize the same loose parts configuration. Always verify your transmission serial number before ordering. For full assembly support, consider the 0732042767: COMPRESSION SPRING and 0631612064: SET SCREW for a complete rebuild.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Controls hydraulic pressure to clutch packs |
| 0501211384 | VALVE | Directs fluid flow within valve body |
| 0630532183 | INDENTED RING | Secures piston assembly in housing |
| 4656306145 | PISTON | Applies force to clutch plates |
| 0732042767 | COMPRESSION SPRING | Returns piston to neutral position |
| 0631612064 | SET SCREW | Locks adjustment mechanisms |
| 0631610026 | SET SCREW | Secures valve body components |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing |
| 4657301130 | HOUS.FRONT SECT | Front section of transmission housing |
| 4657301131 | HOUSING REAR PART | Rear section of transmission housing |
Frequently Asked Questions
Q: Can I use this loose parts kit with a ZF WG180 transmission?
A: Yes, the 4657.183.132 is compatible with WG180, WG191, WG200, and WG210 series transmissions. Always cross-check your transmission tag for the exact series number.
Q: What is the typical lifespan of these loose parts?
A: Under normal operating conditions, these fasteners and rings last the life of the transmission. However, if you experience gear slippage or hydraulic leaks, they should be replaced immediately along with the 4657120005: PRESSURE REGULATOR and 0501211384: VALVE.
Q: Does this kit include all necessary hardware for a full rebuild?
A: This kit contains the loose parts specific to the valve body and piston area. For a complete overhaul, you will also need the 0630532183: INDENTED RING and 4656306145: PISTON separately.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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