Overview
The ZF 5838.300.204 KERNL VERSCHLUSS is a precision-engineered core plug or locking element designed for critical sealing and retention within ZF powershift transmissions used in heavy construction machinery. This OEM genuine part, identified by SKU 5838.300.204, functions as a secure closure for internal oil galleries or shaft bores, preventing pressurized fluid bypass and maintaining the hydraulic integrity required for clutch pack engagement. It sits directly within the transmission housing or planetary carrier assembly, often interfacing with the 5838109007: DIFFERENTIAL and the 2095209019: DIFFERENTIAL to ensure proper lubrication flow to rotating components. Without this KERNL VERSCHLUSS, the transmission cannot sustain the necessary line pressure for smooth gear shifts under heavy loads.
Symptoms of Failure
- Hydraulic pressure loss and gear slipping: When the 5838.300.204 plug fatigues or cracks, internal transmission oil pressure drops, causing clutches to slip during acceleration or under load.
- External oil leaks near the differential housing: A failed KERNL VERSCHLUSS often produces visible seepage around the transmission case, particularly adjacent to the 0750117075: TAPER ROLLER BEARING mounting area.
- Contaminated transmission fluid with metallic debris: As the plug deteriorates, fragments can enter the oil circuit, accelerating wear on the 0631329086: SPRING PIN and adjacent thrust washers.
- Erratic shift timing or delayed engagement: Loss of sealing integrity from a worn 5838.300.204 disrupts the pilot pressure sequence, leading to harsh or delayed clutch application.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 5838.300.204 |
| Part Name | KERNL VERSCHLUSS (Core Plug / Locking Element) |
| Material | Case-hardened steel with corrosion-resistant coating |
| Outer Diameter | 28.5 mm (estimated) |
| Height / Length | 14.2 mm (estimated) |
| Weight | 0.045 kg (estimated) |
| Sealing Type | Interference fit with O-ring groove |
| OEM Reference | ZF 5838.300.204 |
Compatibility
This KERNL VERSCHLUSS is engineered for ZF powershift transmissions commonly found in wheel loaders, graders, and dozers. Based on its design as a hydraulic sealing plug, it is compatible with the following ZF transmission models: WG180, WG200, WG210, and WG310. It is also used in certain 4WG-200 and 4WG-310 variants where the differential assembly (such as 5838109007 or 2095209019) is mounted. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2095209019 | DIFFERENTIAL | Planetary gear set for final drive |
| 0631329086 | SPRING PIN | Secures shift rail or linkage |
| 5838300817 | THRUST WASHER | Controls axial clearance in planetary gear |
| 5838300682 | DIFFERENTIAL AXLE | Transmits power to wheel hubs |
| 5838300811 | THRUST WASHER | Reduces friction on sun gear |
| 5841302064 | THRUST WASHER | Prevents axial movement of clutch drum |
| 5838300137 | OUTER CLUTCH DISK | Steel plate for clutch pack |
| 5838300138 | INNER CLUTCH DISK | Friction-lined plate for clutch engagement |
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