Overview
The ZF 0666.690.292 1-COAT PAINT is a specialized OEM coating formulated exclusively for the WG 94 series transmission. This protective paint is applied to external housing surfaces to prevent corrosion, chemical degradation, and wear from environmental exposure. As an integral part of the transmission assembly, it ensures long-term durability and maintains the structural integrity of components like the 4661101042: TRANSMISSION HOUSING and the 4661301108: HOUSING II. The SKU 0666.690.292 is the exact OEM specification for this single-coat finish, guaranteeing factory-grade adhesion and resistance to hydraulic fluids.
Symptoms of Failure
- Peeling or flaking paint on transmission housing: When the 1-COAT PAINT degrades, visible chips or blisters appear on the TRANSMISSION HOUSING, exposing bare metal to moisture and leading to rust.
- Corrosion spots near bolt holes or seams: Worn paint allows oxidation to form around fasteners and mating surfaces, often accompanied by minor fluid seepage that stains the exterior.
- Increased surface roughness or discoloration: UV exposure or chemical attack causes the coating to lose gloss and develop a chalky texture, reducing protection against hydraulic oil and road salt.
- Premature wear of adjacent seals: Failing paint can trap debris against the housing, accelerating abrasion on gaskets and the 0631306174: CYLINDRICAL PIN alignment points.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 0666.690.292 |
| Coating Type | 1-Coat Acrylic Enamel (OEM Grade) |
| Dry Film Thickness | 60–80 µm |
| Application Area | External housing surfaces (WG94 series) |
| Weight per Unit | 0.45 kg (approx.) |
| Material | Solvent-based polyurethane blend |
| OEM Reference | ZF 0666.690.292 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This 1-COAT PAINT is engineered for the ZF WG 94 transmission series, including models such as WG94, WG120, WG150, WG180, and WG200. It is specifically formulated to match the thermal expansion and chemical resistance requirements of these heavy-duty gearboxes. The coating is applied during original manufacturing and is recommended for all rebuilds involving the TRANSMISSION HOUSING or HOUSING II to maintain OEM corrosion protection.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101042 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4661301108 | HOUSING II | Secondary housing for clutch and valve body |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0769123894 | TYPE PLATE | Identification plate with serial number |
| 0750100022 | SCREW PLUG | Seals oil passages in housing |
| 4660201008 | SCREW PLUG | Drain or fill port plug |
| 0636100117 | SCREW PLUG | Pressure test port plug |
| 0501211384 | VALVE | Hydraulic control valve for shift modulation |
| 0732042156 | COMPRESSION SPRING | Provides return force for valve spools |
| 0768409154 | SCREW PLUG | High-pressure sealing plug |
