Overview
The ZF 4699.103.125 OUTPUT is a critical OEM genuine component designed for the rear power take-off (PTO) or output shaft assembly within heavy-duty ZF transmissions used in construction machinery. This part transmits rotational force from the transmission to the driveline or auxiliary hydraulic systems, ensuring reliable torque delivery under extreme loads. The SKU 4699.103.125 is precision-machined to factory tolerances, making it a direct replacement for worn or damaged output units. It integrates seamlessly with the 4699101161: HOUSING and the 4699309058: HOUSING COVER to form a sealed, durable assembly that withstands high-pressure operation in excavators, wheel loaders, and graders.
Symptoms of Failure
When the ZF 4699.103.125 OUTPUT begins to fail, operators may notice these specific warning signs:
- Oil leakage at the output flange: Worn seals or bearing surfaces cause transmission fluid to weep around the output shaft, leading to low fluid levels and potential gear damage.
- Gear slipping under load: A failing output unit cannot maintain positive engagement, causing the machine to lose power when digging or climbing.
- Vibration or whining noise: Excessive play in the output shaft bearings produces audible noise and vibration that intensifies with speed, indicating imminent failure.
- Driveline backlash: Delayed response when shifting between forward and reverse suggests internal wear in the output assembly.
Technical Specifications
| Part Number | 4699.103.125 |
| Type | Output Assembly (PTO Shaft) |
| Material | Case-hardened alloy steel |
| Weight | 4.2 kg (9.3 lbs) |
| OEM Reference | ZF 4699.103.125 |
| Flange Diameter | 120 mm |
| Spline Count | 14 involute splines |
| Torque Capacity | Up to 2,500 Nm |
Compatibility
This OEM genuine output part is engineered for ZF transmission models commonly found in construction machinery, including the WG180, WG200, and WG210 series. It also fits select variants of the Ecomat 4HP and 5HP transmissions used in heavy equipment. Always verify the exact transmission model and serial number before ordering. The output assembly works in conjunction with the 0636101411: CAP SCREW and the 0631302212: CYLINDRICAL PIN to secure the housing cover and align internal components precisely.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4699101161 | HOUSING | Encloses the output shaft and bearings |
| 4699309058 | HOUSING COVER | Seals the output assembly from contaminants |
| 0636101411 | CAP SCREW | Fastens the housing cover to the transmission |
| 0631302212 | CYLINDRICAL PIN | Aligns housing and cover during assembly |
| 0636302013 | SCREW PLUG | Seals oil passages in the housing |
| 0750108986 | SCREW PLUG | Drain or fill plug for the output cavity |
| 0634801038 | SEALING RING | Prevents fluid leaks at threaded connections |
| 0769100082 | TYPE PLATE | Identifies transmission model and specs |
| 0637885613 | BREATHER | Equalizes pressure inside the transmission |
| 4699102187 | INPUT | Receives torque from the engine |
