ZF 4657.024.100 4 WG 190 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.024.100 4 WG 190 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the core gear train, clutch packs, and hydraulic control system into a single, ready-to-install package. As the central power delivery module, it sits between the engine and the final drive, managing torque distribution across four forward and reverse speeds. The SKU 4657.024.100 is a direct replacement for worn or failed assemblies, ensuring minimal downtime for loaders, graders, and industrial tractors. This complete unit eliminates the need for piecemeal rebuilding, providing a reliable solution for severe service environments.

Symptoms of Failure

When the ZF 4657.024.100 assembly begins to fail, operators typically notice these specific issues:

• Delayed or harsh shifting between ranges: Worn clutch discs or degraded seals inside the assembly cause hesitation or jarring engagement, especially under load.
• Internal oil leaks and low system pressure: Cracks in the housing or failed gaskets allow transmission fluid to bypass, leading to sluggish operation and eventual overheating.
• Gear slipping under heavy torque: As the powershift clutches lose holding capacity, the transmission will momentarily lose drive power when climbing grades or pushing material.
• Unusual whining or grinding noises: Bearing wear or gear tooth damage within the assembly produces metallic sounds that intensify with speed changes.

Technical Specifications

Specification	Value
Assembly Weight (Dry)	~185 kg (408 lbs)
Overall Length	620 mm
Overall Width	480 mm
Overall Height	410 mm
Housing Material	High-strength cast iron (GGG-40)
Max Input Torque	1,200 Nm
OEM Reference	ZF 4657.024.100
Fluid Capacity	14.5 liters (SAE 10W-30)

Compatibility

This complete assembly is specifically engineered for the ZF WG 190 series powershift transmissions. It is a direct fit for models including the WG 180, WG 190, and WG 200, which are commonly found in telescopic handlers, wheel loaders, and industrial forklifts. The unit also shares mounting interfaces with certain WG 150 variants when used with the correct adapter kit. Always verify your transmission serial number against the 4657.024.100 specification to ensure proper oil gallery alignment and clutch pack clearance.

When installing this assembly, it is critical to inspect the surrounding structural components. The 4657101051: TRANSMISSION HOUSING provides the main structural support and must be free of cracks. The 4657201151: HOUS.FRONT SECT seals the front bearing area, while the 4657201103: HOUSING REAR PART and the 4472239184: HOUSING REAR PART enclose the output shaft area. These housings must be aligned perfectly to prevent binding.

Related Components

Part Number	Name	Function
4657101051	TRANSMISSION HOUSING	Main structural casing for gear train
4657201151	HOUS.FRONT SECT	Front section housing for input shaft
4657201103	HOUSING REAR PART	Rear housing for output shaft support
4472239184	HOUSING REAR PART	Alternate rear housing variant
0631306816	CYLINDRICAL PIN	Alignment dowel for housing mating
0636100801	CAP SCREW	Fastener for housing flanges
4656301148	FIXING PLATE	Retainer for clutch pack assembly
4657301032	SCREEN SHEET	Filter screen for oil sump
4657301033	SCREEN SHEET	Secondary filter screen
0636100803	CAP SCREW	Bolt for screen sheet retention

Frequently Asked Questions

Q: Can the ZF 4657.024.100 be rebuilt, or is it only sold as a complete unit?
A: This SKU is supplied as a complete, pre-assembled unit. While individual internal parts are available for service, the assembly is factory-tested to ensure proper clutch clearances and hydraulic balance.

Q: What is the typical service life of this assembly in a wheel loader application?
A: With proper maintenance and clean fluid, the 4 WG 190 assembly typically delivers 8,000 to 12,000 operating hours before requiring major overhaul. Harsh shock loading or contaminated oil will reduce this interval significantly.

Q: Are the housing parts interchangeable between the WG 190 and WG 200 series?
A: The 4657201103: HOUSING REAR PART and 4472239184: HOUSING REAR PART are specific to the WG 190 series. Using them on a WG 200 requires verification of bolt pattern and output shaft spline count.