Cat D7 3T Engine Liners

Hi Forum, Having trouble working out the liner seals and shims for a 3T engine number 3T11667. My part books quotes liners as 8B375 which crosses to a 8N5676.It lists 8 seals 7B2126 and 4 gaskets 2B6463. I have one of the old liners from a previous rebuild by others and the liner has 3 'o' rings at the bottom of the liner and a copper shim under the top lip of the liner. The parts catalog is for D7 Tractors form 8626, Engines 7M4325 to 7M9999 and 3T1 and up. Something does not add up.

The 'gasket' is the copper ring, the quantity of seals was updated with later liners to help reduce corrosion above the upper '0' ring. The Cat dealer should be able to give you full details.