SUPPORT RING 2U1309 - Caterpillar

Solvents, diesel fuel, oil or other cleaners will not remove this grit.
To be sure the bores are clean, check with a lint-free white cloth. If the cloth shows gray or dark, the bore must be cleaned again.
5. After the bores are cleaned, carefully remove the tape, paper or cardboard strips from the crankshaft journals. Wash these areas thoroughly with soap and water and dry with air or clean shop towels. To be sure the journals are clean, check with a lint-free white cloth.6. After the crankshaft is clean, remove the plastic plugs from the lubrication holes and put engine oil on all surfaces to protect them until assembly.The above procedures are adaptable to all 1100, 3100, 3204, and 3208 Engines when access is possible. In some applications it is not possible to use the FLEX-HONE on the rear cylinders from either the top or bottom. For these units it will be necessary to remove the engine.