Overview
The ZF 5838.300.408 SOLENOID VALVE is a critical electro-hydraulic actuator responsible for directing oil flow within the WG100, WG130, and WG131 transmission valve bodies. By precisely modulating hydraulic pressure, this OEM genuine part governs clutch pack engagement and shift timing. The SKU 5838.300.408 sits directly on the control manifold, converting electrical signals from the transmission control unit into mechanical valve movement. When functioning correctly, it ensures smooth gear transitions and consistent torque delivery. This solenoid is often replaced alongside the 5838109009: DIFFERENTIAL during a full valve body overhaul to restore factory shift quality.
Symptoms of Failure
- Erratic or delayed gear engagement: A failing solenoid valve causes hesitation when shifting from Neutral to Drive or Reverse, often accompanied by a harsh clunk.
- Intermittent transmission slipping: Worn internal seals allow pressure loss, resulting in the transmission slipping out of gear under load, particularly in higher ranges.
- Contaminated transmission fluid: Debris from a degraded solenoid can circulate through the system, accelerating wear on the 0750117075: TAPER ROLLER BEARING and other rotating assemblies.
- Check engine or transmission warning light: Electrical resistance changes in the solenoid coil trigger diagnostic trouble codes (DTCs) related to shift solenoid performance.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 5838.300.408 |
| Type | Normally Closed Solenoid Valve |
| Coil Resistance | 5.0 – 6.5 Ohms (at 20°C) |
| Operating Pressure | 8 – 22 bar |
| Body Material | Hardened Steel with Zinc-Nickel Plating |
| Seal Material | Nitrile Rubber (NBR) |
| Weight | 0.34 kg (0.75 lbs) |
| OEM Reference | ZF 5838.300.408 |
Compatibility
This solenoid valve is engineered for ZF WG-series powershift transmissions. Primary applications include the WG100, WG130, and WG131 models commonly found in agricultural tractors and construction loaders. It is also compatible with the WG180 and WG200 series when used in the main pressure control circuit. For complete drivetrain restoration, consider pairing this solenoid with the 2093209023: DIFFERENTIAL and the 5838300626: DIFFERENTIAL HOUSING to ensure all hydraulic and mechanical interfaces are renewed simultaneously.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109009 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209023 | DIFFERENTIAL | Final drive torque distribution assembly |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and bearings |
| 0631329088 | SPRING PIN | Secures shift fork or actuator linkage |
| 5838300811 | THRUST WASHER | Reduces friction between rotating gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power to differential side gears |
| 5838300633 | AXLE | Transmits rotational force to wheel hubs |
| 5838300753 | THRUST WASHER | Controls axial clearance in gear sets |
| 5838300818 | THRUST WASHER | Prevents metal-to-metal contact under load |
Frequently Asked Questions
Q: Can I test the 5838.300.408 solenoid before installation?
A: Yes. Measure coil resistance between the two pins using a multimeter. A reading outside 5.0–6.5 Ohms indicates internal damage. Also apply 12V DC briefly to verify the audible click of the plunger moving.
Q: Will a faulty solenoid cause transmission overheating?
A: Indirectly, yes. If the solenoid sticks open or closed, it can cause continuous clutch slippage, generating excessive heat that degrades fluid and damages seals.
Q: Is this solenoid interchangeable with the ZF 5838.300.409?
A: No. The 5838.300.408 has a different hydraulic flow characteristic and coil resistance. Always verify the exact part number stamped on the original valve body.
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ZF 5838.300.408 SOLENOID VALVE – Solenoid Valve RFQ Support
PartsZF helps B2B buyers source ZF 5838.300.408 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 5838.300.408 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: CONTROL UNIT
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 | 5838.300.408 |
|---|---|
| Normalized SKU | 5838300408 |
| Part name | SOLENOID VALVE |
| Product category | solenoid valve |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. 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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