Overview
This genuine OEM ZF 5840.303.411 SCREW PLUG is a critical sealing component designed specifically for the WG100, WG130, and WG131 transmission series. Positioned within the transmission housing, this screw plug prevents fluid leakage and maintains proper internal pressure by securely sealing access points to the gear train and differential assembly. The SKU 5840.303.411 is manufactured to ZF’s exacting tolerances, ensuring a precise fit that aftermarket alternatives often fail to match. When installed alongside a 2093109002: DIFFERENTIAL or a 0750117075: TAPER ROLLER BEARING, this plug ensures the entire assembly remains contamination-free and properly lubricated.
Symptoms of Failure
When the ZF 5840.303.411 screw plug wears out or becomes damaged, operators typically notice these specific failure modes:
- Transmission fluid seepage around the housing: A worn plug allows oil to escape, leading to low fluid levels and potential overheating.
- Gear engagement hesitation or slipping: Loss of hydraulic pressure from a leaking plug can cause delayed shifts or erratic gear changes.
- Visible corrosion or stripped threads: Over time, road salt and debris can degrade the plug, making removal difficult and compromising the seal.
- Contaminated differential oil: A compromised seal lets moisture and dirt enter the housing, accelerating wear on internal components like the 2093209095: DIFFERENTIAL.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 5840.303.411 |
| Thread Size | M18 x 1.5 (estimated) |
| Overall Length | 22 mm |
| Head Diameter | 24 mm |
| Material | Steel, zinc-plated |
| Weight | 0.04 kg |
| OEM Reference | ZF 5840.303.411 |
Compatibility
This screw plug is engineered for ZF’s WG-series transmissions, specifically the WG100, WG130, and WG131 models. It also fits select WG180 and WG200 variants where the housing design shares the same thread pitch and sealing surface. For optimal performance, always pair this plug with a 2093309071: DIFF.HOUSING to ensure the mating surface is free of burrs or damage.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109002 | DIFFERENTIAL | Distributes torque between wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads |
| 2093209095 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309071 | DIFF.HOUSING | Encloses differential gears |
| 0631100223 | SPRING PIN | Secures shift forks and linkages |
| 0730300820 | THRUST WASHER | Reduces axial friction |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheels |
| 5838300811 | THRUST WASHER | Prevents gear end-play |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear set for torque splitting |
Frequently Asked Questions
Q: Can I reuse the ZF 5840.303.411 screw plug after removal?
A: ZF recommends replacing this plug with a new unit each time it is removed. The sealing surface can deform after initial installation, and reusing it may lead to oil leaks or thread galling.
Q: What torque should I apply when installing this screw plug?
A: For the WG100/WG130 series, tighten the plug to 35 Nm (26 ft-lbs). Over-torquing can crack the differential housing, while under-torquing risks fluid seepage.
Q: Does this plug require a sealing washer or O-ring?
A: No. The 5840.303.411 features an integrated sealing shoulder that compresses against the housing bore. Ensure the mating surface is clean and dry before installation.
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Phone: +86 158 2286 3467 |
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