Overview
The ZF 4660.151.003 REVERSING GEAR is a critical internal component engineered specifically for the WG200 and WG92 series transmissions. This OEM genuine part is responsible for directing hydraulic flow to facilitate smooth directional changes, effectively managing the shift between forward and reverse operation. Situated within the valve body assembly, the reversing gear (SKU 4660.151.003) ensures precise engagement of the clutch packs during gear selection. When paired with a properly sealed TRANSMISSION HOUSING, this component maintains the necessary hydraulic pressure for reliable performance under heavy-duty industrial loads.
Symptoms of Failure
- Delayed or harsh reverse engagement: If the reversing gear wears internally, operators may experience a noticeable lag when shifting from neutral to reverse, often accompanied by a jarring clunk.
- Intermittent gear slipping under load: A worn 4660.151.003 can cause the transmission to momentarily lose drive power when reversing up an incline, a common symptom of hydraulic pressure loss.
- Contaminated transmission fluid with metallic debris: As the gear surfaces degrade, fine metal particles can circulate through the system, often found during routine oil changes.
- Unexpected neutral condition during operation: The transmission may suddenly drop out of gear without warning, particularly when the unit is hot, indicating internal valve failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (OEM) | 4660.151.003 |
| Material | Hardened alloy steel with surface treatment |
| Weight | Approx. 1.2 kg (2.65 lbs) |
| Overall Length | 145 mm |
| Outer Diameter | 68 mm |
| Spline Count | 24 internal splines |
| Operating Pressure Range | 12–18 bar (174–261 psi) |
| OEM Reference | ZF 4660.151.003 |
Compatibility
This reversing gear is designed for ZF’s WG series powershift transmissions. Primary compatibility includes the WG200 and WG92 series, commonly found in mobile cranes, forklifts, and heavy construction equipment. It also fits select variants of the WG180 and WG120 models where the valve body configuration matches. For proper installation, ensure the RANGE SELECTOR is correctly indexed to avoid misalignment. The gear interfaces directly with the HOUSING and requires the PERIPHERALS kit for complete sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Sealing and gasket kit for valve body assembly |
| 0501209818 | RANGE SELECTOR | Controls gear range selection in the transmission |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4660301018 | HOUSING | Secondary housing for valve body components |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for precise component positioning |
| 0769123894 | TYPE PLATE | Identification plate with transmission serial data |
| 4660221012 | SUCTION TUBE | Oil pickup tube for hydraulic pump supply |
| 0634100317 | O-RING | Hydraulic seal for fluid passage connections |
| 0636103273 | CAP SCREW | Fastener for securing valve body covers |
| 0750100022 | SCREW PLUG | Threaded plug for test ports and drain points |
