Oil Filters

The WD940 is a heavy‑duty spin‑on oil filter for industrial diesel engines, construction machinery, agricultural equipment and hydraulic systems. It removes metal particles, carbon deposits, sludge and fine contaminants, keeping lubrication systems clean, reducing component wear and ensuring stable operation.

Key Features

High‑efficiency multilayer composite media: accurate filtration and large dirt‑holding capacity for longer service life.

Built‑in anti‑drain back valve: prevents oil backflow after shutdown and avoids dry‑start damage.

Internal bypass valve: maintains oil supply during cold starts or when the filter is clogged.

Reinforced thick steel shell: high pressure and deformation resistance for harsh conditionsMANN-FILTER.

Premium nitrile rubber seal: aging‑resistant, tight‑fitting and leak‑proof.

Standard dimensions and thread: easy to install, direct replacement without modification.

Technical Specifications

Part Number: WD940

Type: Spin‑on Oil Filter

Outer Diameter: 93 mm

Overall Height: 144 mm

Seal Outer Diameter: 72 mm

Seal Inner Diameter: 63 mm

Thread Size: 3/4‑16 UNF

Filtration Rating: 10 μm

Filtration Efficiency: ≥ 99.5%

Bypass Valve Opening Pressure: 2.5 bar

Max Working Pressure: 2.0 MPa

Service Life: 2000–3000 operating hours

Application:Suitable for construction machinery, agricultural tractors, industrial diesel engines, generator sets and hydraulic systems with matching mounting dimensions.