Overview
The ZF 0501.325.280 SOLENOID VALVE is a precision electro-hydraulic actuator engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part modulates oil flow to control clutch pack engagement and shift timing within the valve body assembly. As a critical component of the transmission’s hydraulic control unit, the SKU 0501.325.280 directly influences shift quality and torque converter lockup. When paired with a properly functioning DIFFERENTIAL and TAPER ROLLER BEARING, this solenoid ensures smooth power delivery under heavy load conditions.
Symptoms of Failure
- Delayed or harsh shifting: A worn solenoid fails to regulate hydraulic pressure, causing abrupt gear engagement or hesitation between ratios.
- Transmission slipping in higher gears: Insufficient valve response leads to clutch pack slippage, especially during uphill climbs or towing.
- Erratic torque converter lockup: The solenoid’s inability to maintain steady pressure results in shuddering or failure to lock the converter at highway speeds.
- Oil contamination in the valve body: Debris from a failing solenoid can migrate into the DIFFERENTIAL HOUSING, accelerating wear on adjacent components.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 0501.325.280 |
| Coil Resistance | 12.5 Ω ± 0.5 Ω |
| Operating Pressure | 8–18 bar |
| Body Material | Hard-anodized aluminum |
| Seal Material | Nitrile rubber (NBR) |
| Weight | 0.28 kg |
| Thread Size | M12 x 1.5 |
Compatibility
This solenoid valve is specifically designed for ZF WG100, WG130, and WG131 transmissions found in medium-duty trucks, buses, and construction equipment. It also fits select WG180 and WG200 variants when used in conjunction with the correct DIFFERENTIAL adapter kit. Always verify your transmission model code against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shaft assemblies |
| 2093209023 | DIFFERENTIAL | Provides final drive ratio reduction |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gear set |
| 0631329088 | SPRING PIN | Secures solenoid mounting bracket |
| 5838300811 | THRUST WASHER | Reduces axial friction in planetary gear sets |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to differential side gears |
| 5838300633 | AXLE | Transmits rotational force to wheel hubs |
| 5838300753 | THRUST WASHER | Prevents axial play in output shaft |
| 5838300818 | THRUST WASHER | Spacer for differential pinion gears |
Frequently Asked Questions
Q: Can I install this solenoid without removing the transmission?
A: Yes, the 0501.325.280 is accessible after draining the fluid and removing the valve body cover. However, we recommend replacing the SPRING PIN and all O-rings during service.
Q: What causes premature solenoid failure in WG130 transmissions?
A: Contaminated transmission fluid is the primary cause. Metal particles from a worn AXLE BEVEL GEAR or degraded THRUST WASHER can clog the solenoid’s internal screen.
Q: Does this part include the mounting hardware?
A: No, the solenoid is sold as a bare unit. You will need the AXLE retaining bolts and THRUST WASHER set for complete reassembly.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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ZF 0501.325.280 SOLENOID VALVE – Solenoid Valve RFQ Support
PartsZF helps B2B buyers source ZF 0501.325.280 SOLENOID VALVE with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This solenoid valve page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 0501.325.280 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: REAR AXLE HOUS.
- Illustration section: PUMP DRIVE
- Illustration section: CONTROL UNIT
- Illustration section: OIL SUPPLY
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 0501.325.280 |
|---|---|
| Normalized SKU | 0501325280 |
| Part name | SOLENOID VALVE |
| Product category | solenoid valve |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: diagram. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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