Overview
The ZF 4656.183.390 LOOSE PARTS for WG171 is a critical internal assembly kit designed to restore precise hydraulic control and mechanical integrity within your ZF WG171 transmission. This OEM genuine part, identified by SKU 4656.183.390, functions as a collection of essential loose components that govern clutch pack engagement and oil flow distribution. When installed correctly, this kit ensures that the valve body and clutch circuits operate without restriction, directly influencing shift quality and torque transfer. The 4656.183.390 set is typically positioned within the main control housing, working in tandem with the TRANSMISSION HOUSING to create a sealed, pressurized environment for gear changes.
Symptoms of Failure
When the components within the 4656.183.390 LOOSE PARTS kit begin to degrade, operators often report delayed or harsh shifting between forward gears, a classic sign of worn internal seals or spacers. Another frequent failure symptom is intermittent loss of drive in reverse, which can be traced back to loose or fatigued parts failing to maintain clutch pack pressure. Technicians also encounter low transmission fluid pressure readings at the test port, indicating that the loose parts are no longer effectively channeling oil. Finally, visible metal debris in the pan during routine service suggests that a component from this kit has fractured, requiring immediate replacement to prevent cascading damage to the HOUS.FRONT SECT.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.183.390 |
| OEM Reference | ZF WG171 Series |
| Material Composition | Hardened Steel / Aluminum Alloy |
| Estimated Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 30 mm |
| Finish | Zinc-Plated / Phosphate Coated |
| Compatible Sealing | 0634313514: O-RING |
| Fastener Requirement | 0636100803: CAP SCREW |
Compatibility
This OEM genuine part is specifically engineered for the ZF WG171 transmission series, but its design principles extend to several related models. The 4656.183.390 LOOSE PARTS kit is compatible with the ZF WG180, WG200, and WG210 series transmissions, where the internal valve body and clutch housing configurations share identical mounting points. It also fits select iterations of the ZF WG150 and WG160 models that utilize the same loose parts architecture. For proper installation, always verify that the SCREEN SHEET is clean and that the TUBE is free of obstructions to ensure optimal fluid flow through the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101072 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656301168 | HOUS.FRONT SECT | Front section housing for clutch packs |
| 4656201015 | SCREEN SHEET | Fine mesh filter for fluid debris |
| 4656301037 | TUBE | Fluid passage conduit |
| 0634313514 | O-RING | Seals hydraulic circuits |
| 0636100803 | CAP SCREW | Secures housing sections |
| 4656301169 | HOUSING REAR PART | Rear casing for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for components |
| 0636100801 | CAP SCREW | Fastener for valve body |
| 0636100160 | CAP SCREW | Mounting bolt for cover plate |
Frequently Asked Questions
Q: Can the 4656.183.390 LOOSE PARTS kit be reused after a transmission rebuild?
A: No. These components are designed for single-use installation. Reusing them can lead to improper sealing and premature failure of the clutch circuits.
Q: How do I know if my WG171 needs this specific kit?
A: If you experience erratic shifting or fluid leaks near the valve body area, inspect the existing loose parts for wear. The 4656.183.390 is a direct replacement for the original factory set.
Q: Is this kit compatible with the ZF WG180 without modification?
A: Yes, the 4656.183.390 is a direct fit for the WG180, provided you also replace the 0634313514: O-RING and 0636100803: CAP SCREW during installation.
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Phone: +86 158 2286 3467 |
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