Overview
The ZF 1204.306.028 is a critical internal component engineered for the WG150, WG190, and WG200 series transmissions. This OEM genuine part functions as a precision-machined guide or spacer element within the hydraulic control assembly, ensuring correct oil flow and pressure regulation during gear shifts. As a factory-specified replacement, the SKU 1204.306.028 directly interfaces with the main valve body and the 4642101047: TRANSMISSION HOUSING to maintain proper alignment. Without this part, the transmission cannot achieve the precise clutch engagement required for smooth operation under heavy loads.
Symptoms of Failure
- Delayed or harsh shifting under load: When the 1204.306.028 wears, hydraulic pressure drops, causing noticeable hesitation between gears during uphill climbs or towing.
- Intermittent loss of forward or reverse drive: A worn part can cause temporary pressure loss, leading to a “neutral” condition that requires engine shutdown to reset.
- External oil seepage near the control housing: Degraded sealing surfaces allow ATF to weep past the assembly, leaving visible drips on the bell housing or oil pan.
- Erratic shift patterns in cold weather: Thickened oil cannot compensate for the worn clearance, resulting in unpredictable gear engagement during warm-up.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 1204.306.028 |
| Material | Hardened steel with anti-corrosion coating |
| Outer Diameter | 28 mm |
| Length | 45 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 1204.306.028 (Genuine) |
| Related Housing Part | 4642301207: TRANSMISSION HOUSING |
| Identification Part | 0730365067: TYPE PLATE |
| Fastener | 0631311009: GROOVED STUD |
Compatibility
This genuine ZF 1204.306.028 component is designed for the following transmission series: WG150, WG190, WG200, WG201, and WG210. It is a direct fit for models including the WG150-6, WG190-8, WG200-10, WG201-12, and WG210-16. The part is also compatible with certain WG180 variants when used in conjunction with the correct 4642301207: TRANSMISSION HOUSING. Always verify your transmission’s serial number against the 0730365067: TYPE PLATE to confirm compatibility before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4642301207 | TRANSMISSION HOUSING | Secondary housing for valve body support |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment fastener for housing sections |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4642301169 | SCREEN SHEET | Coarse mesh pre-filter for oil pump |
| 0636100621 | HEXAGON SCREW | M8 bolt for cover plate retention |
| 4642301186 | SCREEN SHEET | Magnetic screen for debris capture |
| 4644106300 | SHIFT SYSTEM | Complete shift fork and rail assembly |
| 4644306500 | COVER PLATE | Sealing plate for control housing access |
Frequently Asked Questions
Q: Can I install the 1204.306.028 without replacing the 0631311009: GROOVED STUD?
A: It is strongly recommended to replace the grooved stud simultaneously, as corrosion on the stud can prevent proper seating of the new part and cause premature wear.
Q: How do I confirm my WG200 transmission uses this exact SKU?
A: Locate the 0730365067: TYPE PLATE on the housing; if the model code includes “WG200-10” or “WG200-12,” the 1204.306.028 is the correct replacement.
Q: What is the typical lifespan of this part in a WG150 series?
A: Under normal operating conditions with regular fluid changes, the 1204.306.028 lasts approximately 500,000 kilometers. Harsh towing or off-road use may reduce this to 300,000 kilometers.
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Phone: +86 158 2286 3467 |
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