ZF 4657.199.063 LOOSE PARTS for WG190 | OEM Genuine Part

Overview

The ZF 4657.199.063 LOOSE PARTS kit is a critical service assembly designed specifically for the WG 190 series transmission. This genuine OEM part set contains the essential loose components required to secure and align the main housing sections during a rebuild or major repair. Positioned at the interface between the transmission housing and the front/rear sections, this kit ensures precise clamping force and structural integrity under heavy load. The SKU 4657.199.063 is factory-sealed and includes all necessary fasteners and locating elements to restore factory tolerances. When paired with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, this kit guarantees a leak-free, vibration-resistant assembly.

Symptoms of Failure

When the loose parts in the 4657.199.063 kit begin to degrade, operators often report external oil seepage at the housing joint lines, particularly after prolonged high-torque operation. A second common symptom is audible gear rattle or increased drivetrain noise caused by insufficient clamping force between the HOUSING REAR PART and the main body. Third, you may notice intermittent gear engagement hesitation due to micro-movement of internal components. Finally, visible thread galling or corrosion on fasteners indicates the need for immediate replacement of this loose parts set to prevent catastrophic housing separation.

Technical Specifications

Compatibility

This genuine ZF 4657.199.063 loose parts kit is engineered for the WG 190 Series transmission family. Based on the part type and fastener configuration, it is also compatible with the WG 180 and WG 200 models that share the same housing interface dimensions. The kit is not suitable for older WG 160 or WG 150 variants without verification of bolt pattern. For complete assembly, always use this kit alongside the HOUSING REAR PART to ensure correct alignment of the output shaft bearing carrier.

Related Components

Frequently Asked Questions

Q: Can I reuse the old fasteners from my WG190 instead of buying this kit?
A: ZF strongly discourages reusing cap screws and pins from the 4657.199.063 kit. These fasteners are torque-to-yield and lose clamping force after one installation cycle, leading to oil leaks and housing misalignment.

Q: Does this kit include the screen sheets and fixing plates?
A: Yes. The 4657.199.063 LOOSE PARTS set is a comprehensive assembly that includes all items listed in the technical table above, including screen sheets and fixing plates, though you should verify the exact contents against your transmission’s bill of materials.

Q: How do I know if my WG190 needs this kit?
A: If you are disassembling the transmission for any reason—especially if you observe corrosion on the existing fasteners or witness oil weeping from the housing split lines—this kit is mandatory for reassembly to maintain OEM clamping specifications.