Overview
The ZF 4108.338.001 RETAINING CLIP is a critical OEM genuine fastening component engineered to secure internal shafts and gear assemblies within ZF construction machinery transmissions. This precision-formed clip prevents axial movement of planetary gear sets and bearing packs, ensuring correct gear mesh alignment under high-torque loads. The SKU 4108.338.001 is specifically designed to lock into grooves on the main shaft, working in conjunction with the 4108101112 HOUSING and the 4108201177 HOUSING to maintain structural integrity of the rotating assembly. Without this retaining clip, axial play can develop, leading to catastrophic gear tooth damage.
Symptoms of Failure
When the ZF 4108.338.001 retaining clip fatigues or fractures, operators will notice distinct failure indicators. Transmission gear slipping under load is the most common symptom, as the clip can no longer hold the planetary carrier in its indexed position. Intermittent grinding noises during gear engagement occur when the clip loses tension and allows components to shift axially. Unexplained oil contamination with metallic debris in the sump indicates the clip has broken and is abrading against the 4108301304 BEARING COVER. Finally, difficulty engaging or disengaging the PTO suggests the retaining clip has dislodged, allowing the output shaft to drift out of tolerance.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4108.338.001 |
| Material | Spring steel (C67S) with phosphate coating |
| Outer Diameter | 68.5 mm |
| Wire Thickness | 4.0 mm |
| Groove Width | 4.2 mm |
| Weight | 0.028 kg |
| OEM Reference | ZF 4108.338.001 |
| Hardness | HRC 44-48 |
Compatibility
This retaining clip is a standard fitment across multiple ZF heavy-duty transmission platforms used in construction machinery. It is confirmed compatible with the ZF WG180, ZF WG200, and ZF WG210 series transmissions. The clip also appears in the ZF 4WG-200 and ZF 5WG-210 power shift transmissions. When replacing this clip, always inspect the mating groove in the 0636302056 SCREW PLUG bore for wear, as a worn groove will prevent the clip from seating properly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101112 | HOUSING | Main transmission housing casting |
| 4108201177 | HOUSING | Rear housing for output shaft support |
| 0636302056 | SCREW PLUG | Seals oil passages in the valve body |
| 4108301304 | BEARING COVER | Retains and seals the main bearing |
| 4108306173 | GASKET | Seals the bearing cover interface |
| 0750110040 | SHAFT SEAL | Prevents oil leakage at the output shaft |
| 4108102042 | INPUT | Input shaft assembly for torque converter |
| 4108302099 | PLANET CARRIER | Holds planetary gears in the gearset |
| 4108302007 | BEARINGSHEET | Thrust washer for planetary carrier |
| 0635332196 | BALL BEARING | Supports rotating shafts in the housing |
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