Overview
The ZF 4657.154.026 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 210 Series transmission family. This unit serves as the primary mechanical interface for transferring engine torque to auxiliary hydraulic systems, such as dump truck hoists or concrete mixer drums. Positioned on the transmission’s side cover, the PTO engages via a sliding gear mechanism. The SKU 4657.154.026 is manufactured to ZF’s original tolerances, ensuring a direct bolt-on replacement without modification. When installed, it works in concert with the HOUS.FRONT SECT (4657201161) to maintain proper gear alignment and housing integrity.
Symptoms of Failure
- Oil seepage at the PTO mounting flange: A worn O-RING (0634313603) or gasket failure leads to visible transmission fluid leaks, often mistaken for a main seal issue.
- Intermittent gear disengagement under load: If the CYLINDRICAL PIN (0631306816) that secures the shift fork wears, the PTO may slip out of gear, causing a sudden loss of hydraulic power.
- Grinding noise during engagement: Damaged internal splines or a misaligned 螺栓 (0636115293) can produce a metallic chatter, indicating the PTO is not fully meshing with the transmission’s drive gear.
- Reduced hydraulic system pressure: A failing PTO output shaft bearing creates vibration, which reduces the efficiency of the attached pump, leading to sluggish equipment operation.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.154.026 |
| Housing Material | High-strength cast iron (GGG-40) |
| Weight (approx.) | 8.2 kg (18.1 lbs) |
| Input Spline Count | 10-tooth, 2.5 module |
| Max Torque Capacity | 650 Nm (479 ft-lbs) |
| Mounting Bolt Pattern | 4-hole, 130 mm center distance |
| Seal Type | Viton dual-lip (integrated) |
Compatibility
This PTO is designed for the ZF WG 210 Series and is also backward-compatible with earlier WG180 and WG200 transmissions, provided the correct adapter plate is used. It fits all WG210 variants, including the WG210-6 and WG210-8, which are common in medium-duty trucks and construction equipment. For proper installation, ensure the 螺栓 (0636115293) are torqued to 85 Nm and that the O-RING (0634313603) is replaced simultaneously to prevent leaks. The CYLINDRICAL PIN (0631306816) must be inspected for wear during service.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for PTO mounting |
| 0636115293 | 螺栓 | Hex bolt for securing PTO to housing |
| 0634313603 | O-RING | Seals the PTO flange against oil leaks |
| 0631306816 | CYLINDRICAL PIN | Aligns shift fork for gear engagement |
| 0636100801 | CAP SCREW | Fastener for cover plate retention |
| 4656301148 | FIXING PLATE | Locks PTO output shaft in position |
| 4657301032 | SCREEN SHEET | Filter mesh for PTO oil inlet |
| 4657301033 | SCREEN SHEET | Secondary filter for return oil flow |
| 0636100803 | CAP SCREW | Bolt for screen sheet retention |
| 4681301040 | OIL FEED.HOUSG. | Distributes lubricant to PTO bearings |
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