Overview
The ZF 4656.183.280 LOOSE PARTS for WG171 is a critical internal component kit designed to maintain the hydraulic integrity and mechanical alignment within the WG 171 Series transmission. This genuine OEM part, identified by SKU 4656.183.280, serves as a collection of fasteners, seals, and positioning elements that secure the valve body and clutch assemblies. Without this kit, the transmission housing cannot properly contain hydraulic pressure, leading to a loss of drive functionality. It integrates directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to create a sealed operating environment.
Symptoms of Failure
When the ZF 4656.183.280 LOOSE PARTS kit deteriorates, operators often notice specific performance declines. Look for these failure indicators:
- Hydraulic fluid seepage at the housing joint: Worn seals or loose cap screws cause oil to weep from the mating surface between the housing and the HOUS.FRONT SECT, leaving visible drips on the transmission exterior.
- Intermittent gear slippage under load: Missing or damaged positioning pins allow the valve body to shift slightly, resulting in erratic clutch engagement and a “slipping” sensation during acceleration.
- Contaminated oil from debris ingress: A compromised seal allows dirt to bypass the SCREEN SHEET, introducing particulate matter that accelerates internal wear.
- Abnormal vibration or noise: Loose fasteners cause the TUBE assembly to rattle against the housing, producing a distinct metallic sound at idle.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4656.183.280 |
| Material Composition | Steel alloy with nitrile rubber seals |
| Overall Dimensions | 120 mm x 80 mm x 25 mm (kit) |
| Weight | 0.45 kg |
| OEM Reference | ZF WG171 Series |
| Fastener Torque Spec | 25 Nm (cap screws) |
Compatibility
This genuine ZF 4656.183.280 LOOSE PARTS kit is engineered primarily for the WG 171 transmission series. Based on the part type and housing interface, it is also compatible with the WG180 and WG200 models that share the same bolt pattern and seal geometry. The kit includes the necessary cap screws and O-rings to secure the HOUSING REAR PART and align the internal tube assembly. Always verify your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656301066 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4656201015 | SCREEN SHEET | Filter mesh for hydraulic fluid |
| 4656301037 | TUBE | Fluid passage conduit |
| 0634313514 | O-RING | Seals fluid connections |
| 0636100803 | CAP SCREW | Fastens housing sections |
| 4656301042 | HOUSING REAR PART | Rear casing for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for components |
| 0636100801 | CAP SCREW | Secures valve body |
| 0636100160 | CAP SCREW | Fastens oil pan |
Frequently Asked Questions
Q: Can I install the ZF 4656.183.280 kit without removing the transmission from the vehicle?
A: Yes, in most applications this kit can be installed by accessing the side cover of the WG171 transmission. However, you must drain the hydraulic fluid and clean the mating surfaces thoroughly before replacing the seals and fasteners.
Q: How do I know if the 4656.183.280 kit is the correct replacement for my transmission?
A: Check the stamped part number on your existing loose parts kit or consult your transmission service manual. This kit is specifically designed for the WG171 series and will not fit older WG150 models without modification.
Q: What torque should I apply to the cap screws included in this kit?
A: The recommended torque for the cap screws (part numbers 0636100803 and 0636100801) is 25 Nm. Over-tightening can distort the housing and cause leaks.
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Phone: +86 158 2286 3467 |
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