Overview
The ZF 4657.154.027 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 210 Series transmission. This PTO unit transfers engine torque to auxiliary hydraulic systems, such as dump truck hoists, concrete mixer drums, or refuse packer bodies, by engaging directly with the transmission’s gear train. As a factory-spec part, the SKU 4657.154.027 ensures precise alignment and load capacity, reducing wear on adjacent assemblies. It mounts on the transmission housing and interfaces with the HOUS.FRONT SECT to maintain oil circulation and structural integrity during high-torque operations.
Symptoms of Failure
- Hydraulic system power loss under load: If the PTO gear teeth wear or the clutch pack slips, operators will notice reduced hydraulic pressure when lifting or rotating equipment, often accompanied by a whining noise from the transmission.
- Oil leaks around the PTO mounting flange: A degraded seal or cracked housing allows transmission fluid to escape, visible as drips near the HOUSING REAR PART interface. This leads to low fluid levels and potential overheating.
- Intermittent engagement or failure to disengage: Worn shift forks or internal springs cause the PTO to stick in the engaged position, draining engine power even when the auxiliary system is off, or failing to engage entirely when commanded.
- Excessive vibration or gear rattle: Bearing wear inside the PTO unit creates play, transmitting vibration through the TRANSMISSION HOUSING and into the cab, often mistaken for driveline issues.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.154.027 |
| OEM Reference | ZF 4657.154.027 |
| Material | High-strength cast iron housing 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 Bolt Pattern | 4-bolt SAE B flange |
| Max Torque Capacity | 450 Nm (332 lb-ft) |
| Operating Temperature Range | -20°C to +120°C |
| Sealing Compound Required | SURFACE SEALING COMPOUND (0666790033) for flange mating |
Compatibility
This PTO is engineered for the ZF WG 210 Series, but it also fits select models in the WG180, WG200, and WG250 families when used with the correct adapter kit. It is commonly found on ZF 6WG210, 5WG210, and 4WG210 transmissions used in medium-duty trucks, fire apparatus, and construction vehicles. Always verify the transmission serial number and consult the TRANSMISSION HOUSING casting code to confirm fitment. The PTO requires proper application of SURFACE SEALING COMPOUND at the mating surface to prevent leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101086 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and supports the PTO mount. |
| 4657201176 | HOUS.FRONT SECT | Front section of the transmission housing that aligns the input shaft and PTO drive gear. |
| 0666790033 | SURFACE SEALING COMPOUND | Anaerobic sealant applied to PTO and housing flanges to prevent oil seepage. |
| 4657201179 | HOUSING REAR PART | Rear housing section that supports the output shaft and PTO bearing carrier. |
| 4657298110 | HOUSING REAR SECTION | Alternate rear housing variant for specific WG210 configurations. |
| 0636115293 | 螺栓 (Bolt) | M10 x 30 mm hex bolt used to secure the PTO to the transmission housing. |
| 0634313603 | O-RING | Rubber seal for the PTO hydraulic port to prevent fluid leaks. |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel pin for precise PTO positioning during assembly. |
| 0636100801 | CAP SCREW | M8 x 20 mm cap screw for securing the PTO cover plate. |
| 4656301148 | FIXING PLATE | Retaining plate that locks the PTO shift mechanism in position. |
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