Overview
The ZF 4657.155.013 Power Take-Off (PTO) is an OEM genuine component engineered specifically for the WG 191 and WG 211 series transmissions. This unit serves as the primary mechanical interface for transferring engine torque to auxiliary hydraulic pumps or driven equipment, mounted directly to the transmission housing. The SKU 4657.155.013 ensures precise gear engagement and oil flow control within the PTO assembly, making it a critical element for reliable power extraction in heavy-duty industrial applications. When paired with the 4657120005: PRESSURE REGULATOR, the system maintains consistent hydraulic pressure for smooth clutch engagement and disengagement during operation.
Symptoms of Failure
- Hydraulic oil seepage around the PTO mounting flange: Worn seals or gaskets in the 4657.155.013 unit allow transmission fluid to escape, often visible as drips or wet spots on the housing exterior.
- Intermittent gear disengagement under load: A failing internal shift mechanism causes the PTO to slip out of gear when torque demand increases, leading to sudden loss of auxiliary power.
- Unusual grinding or whining noise during PTO activation: Damaged bearings or gear teeth within the assembly produce metallic sounds, indicating imminent mechanical failure.
- Delayed or incomplete PTO engagement: Insufficient hydraulic pressure from a degraded unit results in slow response times when activating the power take-off, often accompanied by shuddering.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.155.013 |
| Material | High-grade cast iron with hardened steel gears |
| Weight | 4.2 kg (9.3 lbs) |
| Dimensions (L x W x H) | 210 mm x 145 mm x 120 mm |
| OEM Reference | ZF 4657.155.013 (Genuine) |
| Max Torque Capacity | 450 Nm |
| Operating Pressure | 12–18 bar |
Compatibility
This genuine ZF power take-off is designed for direct fitment into the WG 191 and WG 211 transmission families. It is also compatible with earlier WG 180 and WG 200 series models, provided the mounting flange pattern matches. The 4657.155.013 unit integrates seamlessly with the 0501211384: VALVE for controlling hydraulic flow to the clutch pack, while the 0630532183: INDENTED RING ensures proper axial retention of internal components. For optimal performance, the 4656306145: PISTON must be inspected alongside this PTO to verify correct actuation force.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Maintains stable hydraulic pressure for PTO clutch engagement |
| 0501211384 | VALVE | Directs oil flow to the PTO shift mechanism |
| 0630532183 | INDENTED RING | Secures internal gears and prevents axial movement |
| 4656306145 | PISTON | Applies force to engage the PTO clutch pack |
| 0732042767 | COMPRESSION SPRING | Returns the PTO piston to disengaged position |
| 0631612064 | SET SCREW | Locks the PTO housing to the transmission case |
| 0631610026 | SET SCREW | Adjusts PTO gear backlash tolerance |
| 4657101049 | TRANSMISSION HOUSING | Encloses the entire PTO assembly |
| 4657301130 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657301131 | HOUSING REAR PART | Rear section of the transmission housing |
Frequently Asked Questions
Q: Can the ZF 4657.155.013 be repaired, or must it be replaced entirely?
A: While minor seal kits are available, the internal gear set and bearing assembly are precision-matched at the factory. For reliable operation, we recommend full replacement of the 4657.155.013 unit rather than attempting partial repairs.
Q: What transmission fluid is recommended for this PTO?
A: Use only ZF-approved mineral-based transmission oil (TE-ML 03 or 07 specification). Synthetic fluids may cause seal swelling in the 4657.155.013 assembly, leading to premature failure.
Q: How often should the PTO be inspected for wear?
A: For heavy-duty applications, inspect the 4657.155.013 every 500 operating hours or during each transmission oil change. Look for metal particles in the oil filter and listen for abnormal gear noise during engagement.
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Phone: +86 158 2286 3467 |
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