Overview
The ZF 4651.151.019 is a critical OEM genuine component engineered specifically for the WG 110 series transmission. This precision-machined part functions as a hydraulic control element, regulating fluid pressure and flow within the valve body assembly to ensure smooth gear engagement and consistent torque delivery. As an integral part of the transmission’s hydraulic circuit, the SKU 4651.151.019 works in concert with the TRANSMISSION HOUSING (4651101013) to maintain proper oil routing and pressure integrity. Without this component, the WG110 transmission cannot achieve the precise shift timing required for heavy-duty industrial applications.
Symptoms of Failure
- Delayed or harsh shifting – When the 4651.151.019 wears, hydraulic pressure drops, causing noticeable lag between gear changes or abrupt engagement that can damage drivetrain components.
- Transmission fluid leaks near the valve body – A worn sealing surface on this part allows ATF to escape, often pooling around the HOUSING (4651301032) and creating visible drips under the vehicle.
- Intermittent gear slipping under load – As internal clearances increase, the part fails to maintain clutch pack pressure, resulting in momentary power loss during uphill climbs or heavy hauling.
- Erratic shift patterns in cold weather – Degraded material properties cause inconsistent hydraulic response when transmission fluid is thick, leading to unpredictable gear selection during warm-up cycles.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4651.151.019 |
| Material | Hardened aluminum alloy with anodized coating |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Width | 68 mm |
| Height | 52 mm |
| Sealing Type | Integrated O-ring groove (compatible with O-RING (0634303928)) |
| Operating Pressure Range | 8–22 bar |
| Temperature Range | -40°C to +120°C |
Compatibility
This OEM genuine part is primarily designed for the ZF WG 110 series transmission, commonly found in municipal buses, fire trucks, and medium-duty construction vehicles. It also cross-references with select models in the WG 180 and WG 200 series, provided the valve body configuration matches. For installations using the HOUSING (4651301033), verify that the mounting flange alignment corresponds to the 4651.151.019’s port geometry. Always consult your transmission’s parts manual to confirm fitment before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101013 | TRANSMISSION HOUSING | Main structural casing that encloses gear sets and hydraulic passages |
| 4651301032 | HOUSING | Secondary housing for valve body and solenoid mounting |
| 0634303928 | O-RING | Seals fluid connections between housing and control components |
| 4651301033 | HOUSING | Alternate housing variant for WG110 with different port orientation |
| 4651203002 | SCREEN SHEET | Fine mesh filter protecting hydraulic valves from debris |
| 4651303005 | SCREEN SHEET | Secondary filter screen for return line filtration |
| 0636101032 | CAP SCREW | Fastener securing housing sections with precise torque rating |
| 0630361028 | SEALING CAP | Plugs unused hydraulic ports to prevent contamination |
| 4475280060 | SCREW PLUG | Threaded plug for pressure test points and drain ports |
| 0634303312 | O-RING | Smaller diameter seal for cap screw and plug applications |
Frequently Asked Questions
Q: Can the 4651.151.019 be repaired or must it be replaced?
A: This is a precision-machined OEM component with no serviceable internal parts. Once worn or damaged, replacement with a genuine ZF unit is required to restore proper hydraulic function.
Q: Does this part require any special tools for installation?
A: Yes, a torque wrench calibrated to ZF specifications is essential, along with a seal installer for the O-RING (0634303928). Improper tightening can distort the valve body bore.
Q: How does the 4651.151.019 interact with the transmission housing?
A: It mounts directly inside the TRANSMISSION HOUSING (4651101013), where it channels pressurized fluid through precisely machined galleries to control clutch and band application.
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Phone: +86 158 2286 3467 |
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