Overview
The ZF 4108.321.015 CONNECTING PART is a precision-machined OEM genuine component designed to serve as a critical linkage within the hydraulic clutch and gearshift assembly of heavy-duty ZF construction machinery transmissions. This part functions as a mechanical interface, transferring motion between the shift fork and the clutch pack actuator. It is housed inside the main transmission casing, directly adjacent to the 4108101057: HOUSING and the 4108201177: HOUSING, ensuring precise engagement during gear changes. The SKU 4108.321.015 is a direct OEM replacement, guaranteeing exact fitment and material integrity for demanding off-highway applications.
Symptoms of Failure
When the ZF 4108.321.015 connecting part wears or fractures, operators will notice distinct operational issues. Common failure symptoms include:
- Delayed or incomplete gear engagement – The part may develop slop in its pivot bore, causing a lag between shift lever movement and clutch actuation.
- Intermittent gear slipping under load – A worn connecting part cannot maintain proper fork travel, leading to partial clutch pack engagement.
- Metallic rattling from the transmission housing – Loose or broken connecting parts create audible chatter, especially at idle or during low-speed maneuvering.
- Hydraulic fluid contamination – Cracks in the part can shed metal debris into the oil, accelerating wear on the 0636302056: SCREW PLUG and adjacent seals.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4108.321.015 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 98.5 mm |
| Pivot Bore Diameter | 16.0 mm |
| Weight | 0.42 kg |
| Surface Finish | Zinc-nickel plated (corrosion resistant) |
| OEM Reference | ZF 4108.321.015 |
Compatibility
This connecting part is engineered for integration into ZF’s modular powershift transmission family. It is a direct fit for the WG180, WG200, and WG211 series, commonly used in wheel loaders, graders, and telescopic handlers. The part also appears in select WG150 and WG250 variants where the shift linkage geometry matches. Always verify the part number against your transmission’s serial plate. For full assembly, this component works with the 4108301304: BEARING COVER to secure the shift rail end.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101057 | HOUSING | Encloses the clutch pack and shift mechanism |
| 4108201177 | HOUSING | Secondary casing for the PTO drive assembly |
| 0636302056 | SCREW PLUG | Seals hydraulic passages in the valve body |
| 4108301304 | BEARING COVER | Retains the shift rail bearing in position |
| 4108306173 | GASKET | Prevents oil leakage between housing faces |
| 0750110040 | SHAFT SEAL | Dynamic seal for rotating input shafts |
| 4108111051 | POWER TAKE-OFF | Transfers engine power to auxiliary hydraulics |
| 0730106757 | WASHER | Spacer for M10 fastener stack-ups |
| 0730106758 | WASHER | Spacer for M12 fastener stack-ups |
| 0730106759 | WASHER | Spacer for M14 fastener stack-ups |
