FLANGE 5M7947 - Caterpillar

D379, G379, D398, G398, D399, G399 EnginesSUPPLEMENT: 03/18/85SERVICE MAGAZINE, SEPTEMBER 3, 1984, PAGE 2,NEW CRANKSHAFT SEAL GROUPS AVAILABLE The part numbers of the new crankshaft adapters, that must be used with the new seal groups, were omitted from the article. The new crankshaft adapter part numbers are shown in the chart.
--------------- END SUPPLEMENT ---------------SUPPLEMENT: 06/03/85SERVICE MAGAZINE, SEPTEMBER 3, 1984; PAGE 2.Put a mark through the article "New Crankshaft Seal Groups Available". Refer to the article "New Crankshaft Seals Used" in this issue. SERVICE MAGAZINE, SUPPLEMENTS, MARCH 18, 1985; PAGE 19. Put a mark through the Supplement for "New Crankshaft Seal Groups Available". Refer to the article "New Crankshaft Seals Used" in this issue.
--------------- END SUPPLEMENT ---------------Description of Change: Four new crankshaft seal groups are available for the above engines. The new seal groups have better sealing ability and longer life.Adaptable As: The new seal groups are adaptable to all earlier 6.25 bore "Vee" engines and are in effect on the engines shown in the chart. Because the new seals are directional, two groups are required for the front and rear of the crankshaft, depending on engine rotation. The part numbers for the new seals are shown in the chart. Refer to Special Instruction SMHS8301 for installation instructions.