Overview
The ZF 0501.343.631 SCREW PLUG is a critical sealing component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part functions as a threaded closure within the transmission housing, preventing fluid leakage and maintaining internal pressure integrity. Positioned at key access points in the differential assembly, the SKU 0501.343.631 ensures that lubricants remain contained while allowing for periodic maintenance access. When installed alongside a 2093109027: DIFFERENTIAL, this screw plug provides a secure seal that protects internal gears from contamination.
Symptoms of Failure
- Transmission fluid seepage around the plug threads: When the 0501.343.631 screw plug loses its sealing integrity, operators often notice oil weeping from the housing, leading to gradual fluid loss and potential gear damage.
- Audible gear whine or grinding during operation: A loose or damaged screw plug can allow air ingress, causing cavitation in the lubricant system and resulting in increased noise from the 0750117075: TAPER ROLLER BEARING assembly.
- Contaminated transmission oil: A failed seal permits dirt and moisture to enter the housing, accelerating wear on the 2093209095: DIFFERENTIAL components and reducing overall transmission lifespan.
- Inconsistent hydraulic pressure readings: Air leaks past a degraded screw plug can disrupt the internal pressure balance, causing erratic shifting behavior in ZF transmissions.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0501.343.631 |
| Material | Hardened alloy steel with zinc plating |
| Thread Size | M18 x 1.5 (estimated) |
| Overall Length | 22 mm |
| Head Type | Hex socket (8 mm) |
| Weight | 0.045 kg |
| OEM Reference | ZF 0501.343.631 |
| Sealing Method | Copper washer or O-ring (not included) |
Compatibility
This screw plug is specifically designed for ZF WG100, WG130, and WG131 transmission models. It is also compatible with certain variants of the WG180 and WG200 series where the housing uses identical thread specifications. The 0501.343.631 is frequently used in conjunction with the 2093309071: DIFF.HOUSING to ensure a complete seal at the differential access port. Always verify thread pitch and housing depth before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109027 | DIFFERENTIAL | Distributes torque to drive axles |
| 0750117075 | TAPER ROLLER BEARING | Supports rotating shaft loads |
| 2093209095 | DIFFERENTIAL | Secondary torque distribution unit |
| 2093309071 | DIFF.HOUSING | Encloses differential gear assembly |
| 0631100223 | SPRING PIN | Secures components against rotation |
| 0730300820 | THRUST WASHER | Reduces axial friction between gears |
| 4482360002 | AXLE BEVEL GEAR | Transfers power at right angles |
| 2097309085 | DIFFERENTIAL AXLE | Connects differential to wheel hubs |
| 5838300811 | THRUST WASHER | Provides axial load distribution |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear for differential action |
Frequently Asked Questions
Q: Can the 0501.343.631 screw plug be reused after removal?
A: While the plug itself is durable, ZF recommends replacing the sealing washer each time the plug is removed to ensure a leak-free seal. Inspect threads for damage before reinstallation.
Q: What torque specification should I use for this screw plug?
A: For the 0501.343.631 in WG100/WG130/WG131 transmissions, tighten to 35-40 Nm. Over-torquing can distort the housing threads, while under-torquing may cause oil seepage.
Q: Is this part compatible with synthetic transmission fluids?
A: Yes, the zinc-plated alloy steel construction is fully compatible with all standard mineral and synthetic transmission oils used in ZF WG series gearboxes.
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Phone: +86 158 2286 3467 |
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