204420-00 Gasket, Breather Cap. Hercules Diesel and Gas 4 and 6 cylinder 2300 and 3400 series. Both gas and diesel engine types and the D198, 298 series engines. Front cylinder This gasket is used on

This gasket is used on all builds except 04

754-43731 and 754-42951

side cover

Internal diameter of one end will be 1 3/4" inches

204420-00 Gasket, Breather Cap. Hercules Diesel and Gas 4 and 6 cylinder 2300 and 3400 series. Both gas and diesel engine types and the D198, 298 series engines. Front cylinder This gasket is used on204420 00 Oil breather cap gasket. This gasket is used on the 2300, 3400 series engines both diesel and gas. This gasket is also used on the D198, 298 diesel engines which was used in military version engines. This will be item number 21 in the Hercules drawing. Govt number, NSN Notice shape of gasket, insure yours is the same before ordering gasket. OEM Cross Reference: 28521300, 403094609, 285213, 285213 00