Overview
This OEM genuine ZF 4657.137.009 Emergency Steering Pump is a critical hydraulic component designed specifically for the WG 115, WG 160, and WG 210 transmission series. It provides the necessary hydraulic pressure to maintain steering functionality in the event of a primary pump failure, ensuring operator safety and machine control. The pump sits within the transmission housing assembly and interfaces directly with the hydraulic control system. As a genuine OEM part, the SKU 4657.137.009 guarantees exact fitment and original performance specifications for your ZF drivetrain.
Symptoms of Failure
- Loss of emergency steering response: When the pump wears out, the steering wheel may feel heavy or unresponsive during an emergency, indicating insufficient hydraulic pressure generation.
- Hydraulic fluid leaks around the pump housing: Worn seals or a cracked pump body can cause visible oil seepage near the pump mounting point, often accompanied by a drop in reservoir fluid level.
- Unusual whining or grinding noise from the transmission: A failing pump bearing or internal gear wear produces a distinct high-pitched whine or grinding sound during operation, especially under load.
- Intermittent steering assist failure: The steering may work normally at low speeds but fail to provide assist during sudden maneuvers, signaling internal pump degradation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4657.137.009 |
| OEM Reference | ZF 4657.137.009 |
| Material | High-strength cast aluminum alloy with hardened steel internals |
| Weight | Approximately 4.2 kg (9.3 lbs) |
| Dimensions (L x W x H) | 210 mm x 140 mm x 120 mm |
| Operating Pressure | Up to 180 bar (2,610 psi) |
| Fluid Type | ZF-approved hydraulic oil (ATF or equivalent) |
Compatibility
This emergency steering pump is engineered for the ZF WG series powershift transmissions. It is directly compatible with the following models: WG 115, WG 160, and WG 210. Based on its design and hydraulic specifications, it may also be suitable for the WG 180 and WG 200 series transmissions, though verification of mounting flange and port configuration is recommended. The pump integrates with the 4656101031: TRANSMISSION HOUSING and works alongside the 4656201075: HOUS.FRONT SECT to ensure proper fluid routing and pressure regulation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing that encloses gears and shafts |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft and clutch pack |
| 4656201036 | HOUSING REAR PART | Rear section housing for output shaft and bearings |
| 4472239179 | HOUSING REAR PART | Alternate rear housing variant for specific WG models |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise housing assembly |
| 4656301148 | FIXING PLATE | Secures pump and housing components in position |
| 0636100817 | CAP SCREW | Fastener for mounting pump to housing |
| 4656301016 | SCREEN SHEET | Filter screen for hydraulic fluid intake |
| 4656301017 | SCREEN SHEET | Alternate filter screen variant for different fluid viscosities |
| 0636100803 | CAP SCREW | Secondary fastener for housing attachment |
Frequently Asked Questions
Q: Can the 4657.137.009 pump be repaired, or must it be replaced?
This emergency steering pump is a sealed unit. While external seals can sometimes be replaced, internal wear typically requires full replacement to ensure reliable emergency steering performance. We recommend replacing the pump as a complete assembly.
Q: What other parts should I inspect when replacing this pump?
It is advisable to check the condition of the HOUS.FRONT SECT and the HOUSING REAR PART for cracks or wear. Also, replace the SCREEN SHEET to prevent debris from entering the new pump.
Q: Is this pump compatible with ZF WG 180 transmissions?
While primarily designed for WG 115, WG 160, and WG 210, the 4657.137.009 pump may fit WG 180 models. We recommend cross-referencing your transmission serial number with the OEM specifications to confirm compatibility.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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