Overview
The ZF 4166.034.174 CONVERTER Torque Converter Assembly is a critical hydraulic coupling component that sits between the engine flywheel and the transmission input shaft within ZF’s WG series powershift transmissions. This complete unit, identified by SKU 4166.034.174, is responsible for multiplying engine torque during low-speed operation and providing a fluid coupling at higher speeds, ensuring smooth power delivery and reducing driveline shock. When this assembly is replaced, it is common practice to inspect the 4657101033: TRANSMISSION HOUSING for cracks or wear, as the converter sits directly within this main structural component.
Symptoms of Failure
When the ZF 4166.034.174 torque converter begins to fail, operators often notice specific performance issues. Look for these common failure symptoms to identify a worn unit:
- Shuddering or vibration during acceleration: A failing converter lock-up clutch or damaged stator can cause noticeable shaking, especially when moving from a stop.
- Transmission fluid overheating and darkening: Internal slippage within the converter generates excessive heat, leading to burnt-smelling, dark fluid and potential damage to the 4657201027: HOUS.FRONT SECT.
- Delayed or harsh engagement: When shifting from Neutral to Drive or Reverse, a worn converter may cause a noticeable lag or a hard “clunk” as torque is applied.
- Loss of power under load: The vehicle may struggle to climb hills or accelerate, as the converter fails to multiply torque effectively, often accompanied by high engine RPM with low road speed.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4166.034.174 |
| Type | Complete Torque Converter Assembly (Single-Stage, 3-Element) |
| Material | High-Strength Steel Housing with Aluminum Impeller & Turbine |
| Weight (approx.) | 38 kg (83.8 lbs) |
| Overall Diameter (approx.) | 340 mm |
| OEM Reference | ZF 4166.034.174 |
| Pilot Diameter | Standard ZF WG Series Fitment |
Compatibility
This torque converter assembly is engineered for ZF’s heavy-duty WG series powershift transmissions. It is a direct fit for the following transmission model series: WG 180, WG 190, WG 191, WG 200, WG 210, WG 211, and WG 230. These transmissions are commonly found in industrial loaders, forklifts, and construction machinery. When replacing the converter, always verify the condition of the 4657201012: HOUSING REAR PART and the 0631306792: CYLINDRICAL PIN which aligns the converter to the pump drive.
Related Components
Below is a table of additional parts that are frequently inspected or replaced during a torque converter overhaul on ZF WG series transmissions.
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural case housing the converter and gear sets. |
| 4657201027 | HOUS.FRONT SECT | Front section of the housing, supports the converter bell housing. |
| 4657201012 | HOUSING REAR PART | Rear housing section, contains output shaft and clutch packs. |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for converter-to-pump drive connection. |
| 0636100801 | CAP SCREW | Fastener for securing housing sections together. |
| 4656301148 | FIXING PLATE | Retaining plate for converter stator shaft. |
| 4657301032 | SCREEN SHEET | Filter screen for transmission oil sump. |
| 4657301033 | SCREEN SHEET | Secondary filter screen for high-pressure oil circuit. |
| 0636100803 | CAP SCREW | Bolt for converter housing cover plate. |
| 4681301040 | OIL FEED.HOUSG. | Oil feed housing directing fluid to the converter. |
Frequently Asked Questions
Q: How do I know if the ZF 4166.034.174 torque converter is the correct one for my WG 210 transmission?
A: This specific assembly is a direct OEM replacement for the WG 210 series. Verify the transmission model tag on the housing and measure the pilot diameter (approx. 340mm) to confirm fitment. Always compare the old converter’s mounting pad pattern to the new unit.
Q: Can I reuse the old transmission housing when installing this new converter?
A: Yes, but you must thoroughly inspect the 4657101033: TRANSMISSION HOUSING for cracks, warpage, or worn bushing bores. Any damage to the housing can cause misalignment and premature converter failure.
Q: What other seals should I replace when installing this torque converter?
A: It is highly recommended to replace the front pump seal, the converter hub seal, and the O-rings on the 4681301040: OIL FEED.HOUSG. to prevent fluid leaks and ensure proper lubrication pressure.
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Phone: +86 158 2286 3467 |
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