Overview
The ZF 4657.155.409 Power Take-Off (PTO) is a critical auxiliary drive unit engineered specifically for the BP210, WG171, and WG190 series transmissions. This OEM genuine part transfers engine torque to hydraulic pumps, compressors, or other driven equipment, enabling secondary power functions without interrupting the main driveline. Positioned on the transmission housing side, this PTO engages via a pneumatic or mechanical shift mechanism, ensuring reliable power delivery for demanding industrial applications. The SKU 4657.155.409 is manufactured to ZF’s exacting tolerances, guaranteeing seamless integration and long service life in heavy-duty machinery.
Symptoms of Failure
- Hydraulic pump failing to engage or slipping under load: A worn PTO gear or shift fork can cause intermittent power loss, often misdiagnosed as a pump issue. This is a common long-tail search query for “ZF PTO slipping under load.”
- Oil leaks around the PTO mounting flange: Degraded seals or a cracked housing allow transmission fluid to escape, leading to low oil levels and potential transmission damage. Search terms like “ZF PTO oil leak repair” target this symptom.
- Grinding or whining noise during PTO activation: Worn bearings or gear teeth produce audible metal-on-metal sounds, indicating imminent failure. This is frequently searched as “noisy ZF power take-off.”
- Difficulty shifting PTO in or out of gear: A sticking shift mechanism or damaged internal components prevent smooth engagement, often requiring excessive force or leaving the PTO stuck in gear.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.155.409 |
| OEM Reference | ZF 4657.155.409 |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight (approx.) | 12.5 kg (27.6 lbs) |
| Dimensions (L x W x H) | 280 mm x 180 mm x 160 mm |
| Mounting Type | Side-mount, SAE B or C pattern (dependent on transmission variant) |
| Shift Type | Pneumatic or mechanical (lever) |
| Max Torque Capacity | 350 Nm (258 ft-lbs) |
| Oil Capacity | 0.8 liters (integral sump) |
Compatibility
This genuine ZF 4657.155.409 Power Take-Off is designed for direct fitment on the following ZF transmission models: BP 210 Series, WG 171 Series, WG 190 Series, WG 191 Series, WG 210 Series, and WG 211 Series. It is also compatible with select WG180 and WG200 variants that share the same PTO mounting interface. Always verify the transmission serial number and PTO pad configuration before ordering. For proper installation, ensure the TRANSMISSION HOUSING (4656101030) is in good condition, as cracks or warping can affect PTO alignment. Additionally, the HOUS.FRONT SECT (4656301066) and TUBE (4656301037) must be inspected for wear during PTO replacement to prevent oil starvation or misalignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Main structural casing that supports the PTO and internal gears |
| 4656301066 | HOUS.FRONT SECT | Front section housing that aligns the input shaft and PTO drive gear |
| 4656201015 | SCREEN SHEET | Oil filter screen that protects the PTO from debris contamination |
| 4656301037 | TUBE | Oil delivery tube supplying lubrication to the PTO bearings |
| 0634313514 | O-RING | Seals the PTO flange to prevent oil leaks |
| 0636100803 | CAP SCREW | Fastener for securing the PTO to the transmission housing |
| 4656301064 | HOUSING REAR PART | Rear housing section that supports the output shaft and bearings |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise PTO positioning during assembly |
| 0636100801 | CAP SCREW | Bolt for attaching the PTO shift mechanism cover |
| 0636100160 | CAP SCREW | Mounting screw for the PTO oil line bracket |
Frequently Asked Questions
Q: Can the ZF 4657.155.409 PTO be used on a WG180 transmission?
A: Yes, this PTO is compatible with WG180 variants that share the same PTO pad pattern as the WG171 and WG190 series. However, you must verify the transmission’s housing casting number and compare it to the TRANSMISSION HOUSING (4656101030) specifications to ensure proper fitment.
Q: What causes a ZF PTO to leak oil at the mounting flange?
A: The most common cause is a degraded O-RING (0634313514) or a cracked HOUS.FRONT SECT (4656301066). Inspect both components during PTO replacement to prevent recurring leaks.
Q: How do I know if my PTO gear is slipping internally?
A: If the hydraulic pump operates intermittently or fails to maintain pressure, the PTO’s internal gear or shift fork may be worn. Check the SCREEN SHEET (4656201015) for metal debris, which indicates gear damage requiring immediate replacement.
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Phone: +86 158 2286 3467 |
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