Overview
The ZF 4657.155.401 Power Take-Off (PTO) is a genuine OEM component engineered specifically for the WG171, WG190, and WG191 transmission series. This unit transfers engine torque to auxiliary hydraulic pumps or driven equipment, mounting directly to the transmission housing. As a critical interface between your driveline and secondary systems, the SKU 4657.155.401 ensures precise gear engagement and reliable power extraction under heavy loads. It integrates seamlessly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity during operation.
Symptoms of Failure
- Hydraulic oil leaks around the PTO mounting flange – Worn seals or gaskets cause visible drips, often mistaken for transmission pan leaks.
- Intermittent gear slipping under load – The PTO disengages or chatters when driving a pump, reducing hydraulic pressure and system performance.
- Unusual whining or grinding noises – Bearing wear or gear tooth damage produces metallic sounds, especially during PTO engagement or disengagement.
- Difficulty engaging or disengaging the PTO – Sticking shift mechanisms or internal debris prevent smooth operation, leading to operator frustration.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.155.401 |
| OEM Reference | ZF 4657.155.401 |
| Material | High-grade cast iron with hardened steel gears |
| Weight | Approx. 8.2 kg (18.1 lbs) |
| Dimensions (L x W x H) | 210 mm x 145 mm x 120 mm |
| Mounting Type | Flange-mounted, 6-bolt pattern |
| Max Torque Capacity | 450 Nm |
| Compatible Fluid | ZF-approved ATF or hydraulic oil |
Compatibility
This genuine ZF Power Take-Off is designed for the WG 171 Series, WG 190 Series, WG 191 Series, and WG 210 Series transmissions. It also fits select WG180 and WG200 variants where the PTO mounting interface matches the 6-bolt pattern. Always verify your transmission model and housing configuration before installation. The unit works in tandem with the SCREEN SHEET for fluid filtration and the TUBE for oil routing to ensure proper lubrication.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4656301066 | HOUS.FRONT SECT | Front section of the housing, aligns with PTO mounting |
| 4656201015 | SCREEN SHEET | Filters debris from transmission fluid |
| 4656301037 | TUBE | Routes oil to PTO and other components |
| 0634313514 | O-RING | Seals connections to prevent fluid leaks |
| 0636100803 | CAP SCREW | Secures housing and PTO components |
| 4656301064 | HOUSING REAR PART | Rear section of the transmission housing |
| 0631306816 | CYLINDRICAL PIN | Aligns and positions housing sections |
| 0636100801 | CAP SCREW | Fastens PTO to transmission housing |
| 0636100160 | CAP SCREW | Additional fastening for structural integrity |
Frequently Asked Questions
Q: How do I know if the 4657.155.401 PTO is compatible with my WG191 transmission?
A: Check the PTO mounting pad on your transmission housing. The WG191 uses a 6-bolt flange pattern with specific bolt spacing. Measure the distance between mounting holes; if it matches 145 mm center-to-center, this PTO will fit. Always cross-reference your transmission serial number with ZF documentation.
Q: Can I replace just the seals on this PTO instead of the entire unit?
A: Yes, but only if the internal gears and bearings are undamaged. The most common failure point is the input shaft seal. However, if you experience grinding noises or slipping, the entire 4657.155.401 assembly should be replaced to avoid catastrophic failure. Use a new O-ring (part 0634313514) during reinstallation.
Q: What torque should I apply to the cap screws when mounting this PTO?
A: Use 45 Nm (33 ft-lbs) for the cap screws securing the PTO to the housing. Over-tightening can warp the flange and cause oil leaks. Always use new cap screws (part 0636100801) for optimal clamping force.
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Phone: +86 158 2286 3467 |
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