Coca-Cola Co. told Wall Street analysts Friday to lower earnings expectations for 1998, citing slower growth in troubled international markets. It forecast third-quarter worldwide case volume growth of 3% to 4%, down from previous analyst estimates of 6% to 7%. Coca-Cola recorded an 11% volume gain in the same period last year. Its shares, which posted a 52-week high of $87.94 July 14, closed at TKTKTK Friday. On Sept. 24, the company lost its bid to buy Orangina from Pernod-Ricard. Archrival PepsiCo, meanwhile, said Friday it's splitting its North American bottling business from its concentrate operation, along Coca-Cola's decade-old model.