Overview
The ZF 4651.130.404 ENGINE CONNECTION is a critical OEM genuine component designed for the WG 100 Series transmission family. This part serves as the primary interface between the engine flywheel housing and the transmission bell housing, ensuring precise alignment and torque transfer. As a structural link, it absorbs torsional vibrations and maintains driveline integrity under heavy-duty cycles. The SKU 4651.130.404 is engineered to ZF’s exacting tolerances, making it a direct replacement for worn or damaged units in industrial material handling equipment, forklifts, and construction machinery.
Symptoms of Failure
When the 4651.130.404 ENGINE CONNECTION begins to fail, operators often notice transmission-to-engine misalignment causing excessive driveline vibration. A second common symptom is fluid seepage at the bell housing joint, which can escalate into significant oil loss if the connection face becomes warped. Technicians also report intermittent gear engagement hesitation due to axial play between the engine and transmission. Finally, abnormal metallic noise during clutch actuation may indicate the connection has fatigued, requiring immediate replacement to prevent damage to the TRANSMISSION HOUSING.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4651.130.404 |
| Material | High-grade cast iron (GGG-40) |
| Overall Length | 185 mm |
| Flange Diameter | 320 mm |
| Bolt Hole Pattern | 12 x M12 on 280 mm PCD |
| Weight | 4.8 kg |
| OEM Reference | ZF 4651.130.404 |
| Sealing Surface | Ground finish, Ra 0.8 µm |
Compatibility
This ENGINE CONNECTION is primarily validated for the ZF WG 100 Series, including models WG100, WG120, and WG150. It also fits select WG180 and WG200 variants when used with the appropriate O-RING seal kit. For installations requiring a different bell housing profile, the HOUSING (part 4651301029) or the HOUSING (part 4651301024) may be used as intermediate adapters. Always verify the bolt pattern matches your specific transmission series before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4651301029 | HOUSING | Intermediate adapter for bell housing |
| 0634303928 | O-RING | Seals connection joint against leaks |
| 4651301024 | HOUSING | Alternate adapter for WG200 series |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4651303005 | SCREEN SHEET | Secondary filtration mesh |
| 0636101032 | CAP SCREW | Fastens connection to flywheel housing |
| 0630361028 | SEALING CAP | Protects unused bolt holes |
| 4475280060 | SCREW PLUG | Closes oil passages during service |
| 0634303312 | O-RING | Secondary seal for adapter housings |
