Overview
The ZF 0750.100.022 SCREW PLUG is a critical sealing component engineered for the WG200, WG92, and WG98 transmission series. This OEM genuine part, identified by SKU 0750.100.022, functions as a threaded closure within the transmission housing assembly. It prevents fluid contamination and maintains hydraulic pressure by sealing access ports used during assembly or maintenance. The screw plug works in conjunction with the 4660101011: TRANSMISSION HOUSING to ensure a leak-free environment for internal gears and clutches. Its precise threading and material composition are matched to ZF’s original specifications, making it essential for any rebuild or repair of these heavy-duty transmissions.
Symptoms of Failure
- Transmission fluid seepage around the plug head: A worn or cross-threaded 0750.100.022 screw plug often results in visible oil weeping, which can lead to low fluid levels and eventual gear slippage.
- Contaminated hydraulic fluid: When the seal integrity of this plug fails, dirt and moisture enter the system through the port, causing premature wear on internal components like the 0501209818: RANGE SELECTOR.
- Abnormal noise from the transmission sump: A loose or missing screw plug allows air ingestion, leading to aeration of the oil and resulting in whining or chattering sounds during gear changes.
- Difficulty maintaining clutch pressure: Loss of hydraulic pressure due to a compromised plug can cause delayed engagement or slipping in the WG series transmissions.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 0750.100.022 |
| Type | Hex Socket Screw Plug |
| Material | Steel, Zinc-Plated |
| Thread Size | M22 x 1.5 (Estimated) |
| Overall Length | 22 mm (Estimated) |
| Head Diameter | 28 mm (Estimated) |
| Weight | 0.04 kg (0.09 lbs) |
| OEM Reference | ZF 0750.100.022 |
| Sealing Method | Copper Washer or O-Ring (Sold Separately) |
Compatibility
This screw plug is designed for the ZF WG series of powershift transmissions. It is directly compatible with the following models: WG180, WG200, WG90, WG92, WG94, and WG98 series. It is also used in certain variants of the WG211 and WG120 transmissions where the same port configuration exists. The plug threads into the 4660301018: HOUSING component, providing a secure seal for oil drain or inspection ports. Always verify the thread pitch against your specific housing casting number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | External control assembly for shift modulation |
| 0501209818 | RANGE SELECTOR | Hydraulic valve for gear range selection |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4660301018 | HOUSING | Secondary housing for clutch packs |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 4660221012 | SUCTION TUBE | Oil pickup tube from sump to pump |
| 0634100317 | O-RING | Static seal for plug or cover interfaces |
| 0636103273 | CAP SCREW | Fastener for housing flanges |
| 4660101804 | TRANSMISSION HOUSING | Alternative housing casting variant |
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