Overview
The ZF 6029.199.006 PLUG KIT is a critical sealing assembly designed for the oil circuit and pressure test ports within ZF WG150, WG200, WG201, and WG251 series transmissions. This OEM genuine part ensures that hydraulic fluid remains contained under high operating pressures, preventing contamination ingress and maintaining consistent clutch engagement. The SKU 6029.199.006 is factory-matched to the transmission housing bore tolerances, and it is often replaced during a full rebuild alongside the 4642101109: TRANSMISSION HOUSING or the 4642301205: TRANSMISSION HOUSING to guarantee a leak-free seal.
Symptoms of Failure
- Oil seepage around test ports: A worn plug kit causes visible hydraulic fluid weeping near the transmission housing, often mistaken for a gasket failure.
- Erratic gear engagement: When the plug loses its seal, system pressure drops, leading to delayed or harsh shifting in WG200 and WG201 models.
- Contaminated transmission fluid: A compromised plug allows dirt and moisture to enter the sump, accelerating wear on internal components like the 0631311009: GROOVED STUD.
- Audible air hissing from the housing: In severe cases, air drawn past a degraded plug creates a distinct sound during transmission operation.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number (SKU) | 6029.199.006 |
| Material | Steel with nitrile rubber O-ring |
| Thread Size | M14 x 1.5 (estimated) |
| Overall Length | 28 mm |
| Hex Drive Size | 17 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 6029.199.006 |
| Torque Specification | 25 Nm (dry) |
Compatibility
This plug kit is engineered for the following ZF transmission series: WG 150 Series, WG 200 Series, WG 201 Series, and WG 251 Series. It directly replaces the factory-installed plugs in the main valve body and housing ports. For full rebuilds, always verify the condition of the 0730365125: TYPE PLATE to ensure correct model identification before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for housing assembly |
| 4642301168 | SCREEN SHEET | Fine mesh filter for oil pickup |
| 4642301169 | SCREEN SHEET | Alternate mesh filter variant |
| 0636100621 | HEXAGON SCREW | Fastener for cover plate attachment |
| 4642301186 | SCREEN SHEET | High-flow filter screen |
| 4644106300 | SHIFT SYSTEM | Hydraulic shift control assembly |
| 4644306500 | COVER PLATE | Sealing plate for valve body access |
