Overview
The ZF 4657.183.137 LOOSE PARTS kit is a critical service component designed specifically for the WG 190 Series transmission. This assembly group contains the necessary fasteners, seals, and positioning elements required to secure internal sub-assemblies during a rebuild or overhaul. The SKU 4657.183.137 is often referred to as a “hardware kit” because it consolidates multiple small but essential loose parts that prevent vibration and misalignment within the gear train. When paired with a new TRANSMISSION HOUSING and the HOUS.FRONT SECT, this kit ensures that all mating surfaces remain properly torqued and aligned under heavy load.
Symptoms of Failure
When the loose parts within the 4657.183.137 kit begin to degrade or are omitted during a rebuild, operators will notice distinct operational issues. The most common failure symptom is transmission oil seepage around the housing joint, often mistaken for a gasket failure. A second indicator is intermittent gear slippage during upshifts, caused by fasteners backing out and allowing the clutch pack to shift position. Third, you may detect abnormal metallic rattling from the bell housing area, which signals that a CYLINDRICAL PIN has loosened. Finally, hard shifting between forward and reverse can occur if the HOUSING REAR PART is not properly secured by the hardware in this kit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.183.137 |
| Kit Contents | Bolts, washers, locating pins, sealing rings |
| Material Composition | Steel (zinc-plated) / Nitrile rubber seals |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| OEM Reference | ZF 4657.183.137 |
| Thread Grade | 10.9 (high-tensile) |
Compatibility
This LOOSE PARTS kit is primarily engineered for the ZF WG 190 Series transmission, which is widely used in municipal buses and medium-duty trucks. Based on the part architecture, it is also compatible with the WG 180 and WG 200 models that share the same housing bolt pattern. The kit is not recommended for the older WG 150 series without verifying the TRANSMISSION HOUSING flange dimensions. Always cross-reference the HOUS.FRONT SECT part number to confirm fitment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101031 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201027 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657201020 | HOUSING REAR PART | Rear section of the transmission housing |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 0636100801 | CAP SCREW | Fastener for housing cover plates |
| 4656301148 | FIXING PLATE | Retains clutch piston assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for oil circuit |
| 0636100803 | CAP SCREW | Fastener for valve body assembly |
| 4681301040 | OIL FEED.HOUSG. | Oil supply channel housing |
Frequently Asked Questions
Q: Can I reuse the old fasteners from my WG 190 instead of buying the 4657.183.137 kit?
A: ZF engineering recommends against reusing torque-to-yield bolts. The 4657.183.137 LOOSE PARTS kit provides fresh hardware with proper thread-locking compound, ensuring the HOUSING REAR PART remains securely fastened under thermal cycling.
Q: Does this kit include the cylindrical pin for alignment?
A: Yes, the 4657.183.137 kit contains the CYLINDRICAL PIN needed to align the HOUS.FRONT SECT with the main housing. If you need additional pins for a full rebuild, order them separately.
Q: Will this part fit a ZF WG 180 transmission?
A: The 4657.183.137 is dimensionally compatible with the WG 180 and WG 200 models, provided the TRANSMISSION HOUSING has the same bolt circle. Verify your housing part number before ordering.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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