Overview
The ZF 4657.309.008 FLANGE is a critical driveline interface component engineered specifically for the WG 190 series transmission. This OEM genuine part serves as the output connection point, transferring rotational torque from the transmission’s final drive to the propeller shaft or differential. Manufactured to ZF’s exacting tolerances, the 4657.309.008 ensures precise alignment and vibration-free power delivery. It mounts directly onto the output shaft and is sealed against the 4657101033: TRANSMISSION HOUSING, forming a robust assembly that withstands high cyclic loads in heavy-duty industrial applications.
Symptoms of Failure
- Transmission oil leaks at the output shaft seal: When the flange’s mating surface becomes scored or corroded, the seal lip fails, causing fluid to weep or stream from the rear of the transmission.
- Driveline vibration during acceleration: A worn or distorted flange creates runout, leading to noticeable shuddering or humming that intensifies under load.
- Gear slipping or delayed engagement: If the flange’s splines strip or wear unevenly, torque transfer becomes intermittent, mimicking internal clutch failure.
- Metallic debris in transmission fluid: Advanced flange degradation sheds fine metal particles, often discovered during routine oil changes or filter inspections.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.309.008 |
| Material | Forged alloy steel, induction-hardened |
| Weight | 2.85 kg (6.28 lbs) |
| Outer Diameter | 168 mm |
| Bolt Circle Diameter | 140 mm |
| Spline Count | 24 (involute) |
| OEM Reference | ZF 4657.309.008 |
Compatibility
This flange is primarily designed for the ZF WG 190 series, but it also fits select variants of the WG 180, WG 200, and WG 210 transmissions that share the same output shaft geometry. Always verify the spline count and bolt pattern against your unit’s serial number. The flange integrates directly with the 4657201027: HOUS.FRONT SECT and the 4657201012: HOUSING REAR PART, requiring precise alignment during installation. A 0631306792: CYLINDRICAL PIN is used to index the flange to the output shaft, preventing rotational shift under torque.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Encloses gear train and supports all internal components |
| 4657201027 | HOUS.FRONT SECT | Front section of the transmission case, houses pump and converter |
| 4657201012 | HOUSING REAR PART | Rear case section, supports output shaft and flange assembly |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for flange-to-shaft indexing |
| 0636100801 | CAP SCREW | Fastener for flange retention (M12 x 1.5) |
| 4656301148 | FIXING PLATE | Locking plate to prevent fastener loosening |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil sump protection |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for high-flow circuits |
| 0636100803 | CAP SCREW | Fastener for housing sections (M10 x 1.25) |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil delivery channel to clutch packs |
Frequently Asked Questions
Q: Can the 4657.309.008 flange be reused after removal?
A: ZF recommends replacement whenever the flange is removed, as the interference fit and seal surface are single-use. Reusing it risks oil leaks and spline wear.
Q: What torque specification applies to the flange retaining nut?
A: The retaining nut should be torqued to 280 Nm (207 ft-lbs) with a new lock plate. Always consult the WG 190 service manual for exact values.
Q: Does this flange fit the ZF WG 180 series?
A: Yes, the WG 180 uses the same output shaft spline and bolt pattern, but verify the pilot diameter on your specific unit before ordering.
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Phone: +86 158 2286 3467 |
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