Overview
The ZF 0501.216.673 RETAINING CLAMP is a critical fastening component engineered specifically for the WG 131 and WG 171 transmission series. This OEM genuine part secures internal hydraulic lines and wiring harnesses within the transmission housing, preventing vibration-induced movement that can lead to component wear. The SKU 0501.216.673 is designed to withstand high thermal loads and constant oil exposure, ensuring long-term retention of adjacent assemblies. It mounts directly onto the TRANSMISSION HOUSING and interfaces with the HOUS.FRONT SECT to maintain precise alignment of internal routing.
Symptoms of Failure
- Hydraulic line chafing and fluid seepage: A loose retaining clamp allows metal lines to rub against the SCREEN SHEET, causing micro-cracks and slow oil leaks around the valve body area.
- Intermittent gear engagement hesitation: When the clamp fails, the TUBE assembly shifts out of position, disrupting oil flow to clutch packs and producing delayed shifts under load.
- Abnormal rattling noise from transmission bell housing: A broken retaining clamp permits loose components to vibrate against the housing, creating a distinct metallic chatter during acceleration.
- Premature wear of adjacent O-rings: Unsecured lines oscillate and gradually damage sealing surfaces, leading to pressure loss and eventual slipping in higher gears.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 0501.216.673 |
| Material | Spring steel with zinc-nickel coating |
| Width | 28.5 mm |
| Height | 12.0 mm |
| Thickness | 2.5 mm |
| Weight | 0.018 kg |
| OEM Reference | ZF 0501.216.673 |
| Temperature Range | -40°C to +150°C |
| Fastening Torque | 8 Nm (with CAP SCREW) |
Compatibility
This retaining clamp is validated for the ZF WG 131 and WG 171 series transmissions. It also fits select variants of the WG 180 and WG 200 series where the same clamp rail geometry is used. Always verify that the O-RING and HOUSING REAR PART are in good condition when replacing this clamp, as worn mating surfaces can compromise retention force. For installations requiring additional alignment, use a CYLINDRICAL PIN to locate the clamp before tightening the CAP SCREW or CAP SCREW.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing that encloses all rotating assemblies |
| 4656301066 | HOUS.FRONT SECT | Forward section of the housing supporting input shaft bearings |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting valve body from debris |
| 4656301037 | TUBE | Hydraulic fluid conduit between pump and valve body |
| 0634313514 | O-RING | Seals tube connections against pressure loss |
| 0636100803 | CAP SCREW | M8 fastener for clamp attachment to housing |
| 4656301042 | HOUSING REAR PART | Rear housing section containing output shaft seal |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise clamp positioning |
| 0636100801 | CAP SCREW | M6 fastener for secondary clamp retention |
| 0636100160 | CAP SCREW | M10 fastener for housing section joining |
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