Overview
The ZF 4657.183.408 LOOSE PARTS for WG190 is a critical service kit designed to restore the internal integrity of your ZF WG 190 Series transmission. This genuine OEM assembly includes the specific fasteners, seals, and positioning components required to secure the main housing sections during a rebuild or overhaul. As a loose parts set, it replaces all worn or damaged hardware that can compromise the structural alignment of the gear train. The SKU 4657.183.408 is engineered to match factory tolerances, ensuring that the 4657101082: TRANSMISSION HOUSING maintains a leak-free seal against the 4657201166: HOUS.FRONT SECT and the 4657201170: HOUSING REAR PART. Without this kit, the transmission cannot be reassembled to OEM specifications.
Symptoms of Failure
When the components in the 4657.183.408 kit fatigue or are lost during disassembly, operators typically encounter these specific failure modes:
- External oil seepage at housing mating flanges: Worn cap screws or missing sealing washers allow ATF to weep between the 4657298102: HOUSING REAR SECTION and the main case, leading to low fluid levels.
- Intermittent gear slippage under load: Loose housing bolts cause the internal shaft centerlines to shift, reducing clutch pack engagement pressure.
- Abnormal driveline vibration: Degraded locating pins or fixing plates allow the housing halves to micro-move, creating harmonic imbalance.
- Contaminated fluid from debris ingress: A compromised housing seal due to missing screen sheets allows road grit to enter the oil circuit.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.183.408 |
| Kit Contents | Cap screws, cylindrical pins, fixing plates, screen sheets |
| Material Grade | Steel (zinc-plated), stainless steel mesh |
| Total Kit Weight | 0.85 kg (1.87 lbs) |
| Compatible Housing | WG190 Series cast aluminum |
| Torque Specification | 45 Nm ± 5 Nm (per bolt) |
Compatibility
This loose parts kit is specifically validated for the ZF WG 190 Series transmission family. It is also mechanically interchangeable with the WG180 and WG200 models that share the same housing bolt pattern and sealing geometry. The kit includes the 0631306816: CYLINDRICAL PIN for dowel alignment and the 0636100801: CAP SCREW for securing the front section. For full housing closure, the 4656301148: FIXING PLATE and both 4657301032: SCREEN SHEET and 4657301033: SCREEN SHEET are included. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural case for gear assembly |
| 4657201166 | HOUS.FRONT SECT | Front housing section for pump mounting |
| 4657201170 | HOUSING REAR PART | Rear housing section for output shaft |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO interface |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing centering |
| 0636100801 | CAP SCREW | M10 bolt for front housing fastening |
| 4656301148 | FIXING PLATE | Locks cap screws against vibration |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return port |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for suction port |
| 0636100803 | CAP SCREW | M12 bolt for rear housing fastening |
