Overview
The ZF 4657.183.094 LOOSE PARTS kit is a critical service package designed specifically for the WG 190 series transmission. This assembly contains the essential fasteners, seals, and positioning components required to secure internal hydraulic circuits and structural elements within the gearbox. As an OEM genuine part, SKU 4657.183.094 ensures that the TRANSMISSION HOUSING maintains its factory-specified clamping force and alignment. Without this kit, the integrity of the entire power flow path is compromised, leading to pressure loss and eventual mechanical failure.
Symptoms of Failure
- Hydraulic oil seepage at housing joints: When the LOOSE PARTS kit degrades, the sealing surfaces between the HOUS.FRONT SECT and the main casing lose their seal, causing visible oil drips after operation.
- Intermittent gear slippage under load: Worn fasteners allow micro-movement of the HOUSING REAR PART, which misaligns clutch pack clearances and triggers delayed engagement.
- Abnormal vibration during shifts: A loose CYLINDRICAL PIN within the kit can cause the valve body to chatter, producing a distinct shudder in 3rd and 4th gears.
- Increased operating temperature: Failed components restrict oil flow paths, forcing the transmission to run 15-20°C hotter than normal during highway cruising.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.183.094 |
| Material Composition | Hardened Steel / Nitrile Rubber |
| Kit Contents | Bolts, Washers, Dowel Pins, Seals |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Thread Pitch | M10 x 1.5 (primary fasteners) |
| Operating Torque Spec | 45 Nm ± 3 Nm |
| OEM Reference | ZF 4657.183.094 |
Compatibility
This LOOSE PARTS kit is engineered for the ZF WG 190 series but also fits select variants in the WG 180 and WG 200 families due to shared housing architecture. It is specifically validated for use with the TRANSMISSION HOUSING (part 4657101031) and the HOUS.FRONT SECT (part 4657201027). Always verify your transmission serial number against the WG 190 service manual before installation. The kit is not backward-compatible with pre-2005 WG 150 models.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201027 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4657201020 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | High-tensile fastener for housing bolts |
| 4656301148 | FIXING PLATE | Locks valve body in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil sump |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | Secondary housing bolt (shorter length) |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil delivery channel |
Frequently Asked Questions
Q: Can I reuse the old fasteners from my WG 190 instead of buying this kit?
A: No. ZF specifies that all bolts and pins in the 4657.183.094 LOOSE PARTS kit are single-use torque-to-yield components. Reusing them risks thread galling and uneven clamping, which directly leads to the failure symptoms described above.
Q: Does this kit include the gasket for the HOUSING REAR PART?
A: Yes. The kit contains the necessary sealing elements for both the front and rear housing interfaces. However, the OIL FEED.HOUSG. (part 4681301040) is sold separately if your unit requires a replacement feed tube.
Q: How do I verify that 4657.183.094 fits my transmission?
A: Cross-reference your transmission’s serial number with the WG 190 parts catalog. This kit is also compatible with late-model WG 180 units that use the TRANSMISSION HOUSING casting number 4657101031.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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