Oil Seal 3020185 Parts Number 3020185 Parts Name Oil Seal 3020185 Front Gear Cover Brand Cummins Cummins Models NH/NT 855, NT495, NT743 Related Posts Plain Hose 3016142 Piston 3017348 Valve By Pass 3023512 Guide Valvle 3006456 Lower Engine Gasket kit 4915303