QSL9 Cummins Lubricating Oil Cooler Cover 3974324 Parts Catalog Ref No. Part Name Part No. Required 1 Pipe Plug 4933532 1 2 Pipe Plug 3008468 1 3 Pipe Plug 3906619 2 4 Oil Cooler Core Gasket 3918174 1 5 Lubricating Oil Cooler Cover Gasket 3929011 1 Threaded Plug 3931084 1 6 Threaded Plug 3930910 1 7 O-Ring Seal 3930911 …