86 SEBU7899-05 Maintenance Section Fan Drive Bearing - Lubricate 2. Operate the engine at low idle. i02053753 Fan Drive Bearing - Replace 3. Observe the top surface of each valve rotator. The valve rotators should turn slightly when the valves close. SMCS Code: 1359-510-BD NOTICE A valve rotator which does not operate properly will accelerate valve face wear and valve seat wear and shorten valve life. If a damaged rotator is not replaced, valve face guttering could result and cause pieces of the valve to fall into the cylinder. This can cause piston and cylinder head damage. 1. Remove Bearings. Refer to Disassembly and Assembly, “Bearing Removal”. 2.
Measure the bearing housings for roundness and for proper size. 3. Replace the bearings. If a valve fails to rotate, consult your Caterpillar dealer. i02075183 Fuel System - Prime SMCS Code: 1250-548; 1258-548 i02784507 Fan Drive Bearing - Lubricate The Secondary Fuel Filter Has Been Replaced SMCS Code: 1359-086-BD Some of the fan drives have grease fittings and some of the fan drives do not have grease fittings. If there is no grease fitting, periodic lubrication is not required. The fan drive requires grease only if the fan drive is equipped with a zerk. Fuel leaked or spilled onto hot surfaces or elec- trical components can cause a fire.
To help pre- vent possible injury, turn the start switch off when changing fuel filters or water separator elements. Clean up fuel spills immediately. NOTICE Use a suitable container to catch any fuel that might spill. Clean up any spilled fuel immediately. NOTICE Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over discon- nected fuel system component. g00746166 Illustration 49 Note: Refer to Operation and Maintenance Manual, “Fuel System Secondary Filter - Replace” for information on replacing the filter.
Typical location of the grease fitting (if equipped) that is for the fan drive bearing The pulley is shown with the belt guards that have been removed. 1. Turn the ignition switch to the “OFF” position. Lubricate the grease fitting that is on the fan drive bearing with High Speed Ball Bearing Grease or the equivalent. Inspect the fan drive pulley assembly for wear or for damage. If the shaft is loose, an inspection of the internal components should be performed. Refer to the Systems Operation Testing and Adjusting Manual for additional information.