Overview
The ZF 4657.199.048 LOOSE PARTS kit is a critical service assembly designed for the WG190 and WG210 series transmissions. This OEM genuine part consolidates essential fasteners, seals, and positioning components that secure internal sub-assemblies within the transmission housing. Specifically, this kit interfaces with the main casing structure and the front section housing to maintain precise gear alignment and hydraulic pressure integrity. The SKU 4657.199.048 is often specified during a full rebuild or when replacing the TRANSMISSION HOUSING to ensure all mating surfaces are correctly torqued and sealed.
Symptoms of Failure
- External oil seepage at housing joints: When the loose parts in this kit degrade, you may notice fluid weeping between the HOUS.FRONT SECT and the main casing, leading to gradual transmission fluid loss.
- Intermittent gear slippage under load: Worn positioning components can allow slight axial movement of the HOUSING REAR PART, causing clutch packs to engage inconsistently.
- Abnormal driveline vibration: A loose CYLINDRICAL PIN within the assembly can create play between the housing sections, transmitting vibration through the drivetrain during acceleration.
- Difficulty shifting into gear: If the fixing plates or cap screws in this kit lose their clamping force, the valve body alignment shifts, resulting in delayed or harsh gear engagement.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.199.048 |
| Kit Contents | Fasteners, seals, cylindrical pins, fixing plates |
| Material Composition | Steel (hardened), Nitrile rubber seals |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Applicable Housing Torque | 45–55 Nm (M8 bolts) |
| OEM Reference | ZF 4657.199.048 |
Compatibility
This loose parts kit is engineered for ZF WG-series transmissions, primarily the WG190 and WG210 models. It is also compatible with the WG180 and WG200 variants when used in conjunction with the correct TRANSMISSION HOUSING. The kit supports both standard and heavy-duty configurations where the HOUS.FRONT SECT and HOUSING REAR PART are used. Always verify the CYLINDRICAL PIN alignment before final assembly to ensure proper fitment across all WG-series platforms.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main casing that encloses gear sets |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201012 | HOUSING REAR PART | Rear section housing for output shaft bearing |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 0636100801 | CAP SCREW | M8 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for oil circuit |
| 0636100803 | CAP SCREW | M10 bolt for heavy-duty fastening |
| 4681301040 | OIL FEED.HOUSG. | Distributes hydraulic fluid to clutch packs |
Frequently Asked Questions
Q: Can I reuse the existing cap screws from my old housing when installing the 4657.199.048 kit?
A: No. The kit includes new cap screws (such as 0636100801 and 0636100803) because original fasteners can stretch or lose torque retention after removal, risking oil leaks.
Q: Does this kit include the screen sheets for the oil filter?
A: No. The 4657.199.048 kit focuses on housing fasteners and alignment pins. The SCREEN SHEET (4657301032) and SCREEN SHEET (4657301033) are ordered separately for oil circuit maintenance.
Q: How do I confirm the CYLINDRICAL PIN is correctly seated?
A: Insert the pin into the alignment hole on the HOUSING REAR PART; it should sit flush with the mating surface. Any protrusion indicates a worn pin that must be replaced to avoid housing misalignment.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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