OM4033.2 Maintenance - Section 4 Automatic Lubrication System 4-19 GENERAL INSTRUCTIONS LUBRICANT REQUIRED FOR SYSTEM Grease requirements will depend on ambient tempera- tures encountered during truck operation: Above 90°F (32°C) - Use NLGI No. 2 multipur- pose grease (MPG). -25° to 90°F (-32° to 32°C) - Use NLGI No. 1 mul- tipurpose grease (MPG). Below -25°F (-32°C) - Refer to local supplier for extreme cold weather lubricant requirements. SYSTEM PRIMING The system must be full of grease and free of air pock- ets to function properly. After maintenance, if the pri- mary or secondary lubrication lines were replaced, it will be necessary to reprime the system to eject all entrapped air. 1.
Fill lube reservoir with lubricant, if necessary. 2. To purge air from the main supply line, remove the main supply line at the Lincoln Lube canister and connect an external grease supply to the line. 3. Remove plugs from each injector group in sequence (right front, left front, and rear axle). 4. Using the external grease source, pump grease until grease appears at the group of injectors and re-install the pipe plug. Repeat for remaining injector groups. 5. Remove the caps from each injector and connect an external grease supply to the zerk on the injector and pump until grease appears at the far end of the individual grease hose or the joint being greased. FIGURE 4-5. FILTER ASSEMBLY 1.
Housing 2. Bypass Indicator 3. O-Ring 4. Backup Ring 5. Element 6. Spring 7. Bowl 8. O-Ring 9. Plug FILTER ASSEMBLY The filter assembly element (5, Figure 4-5) should be replaced if the bypass indicator (2) shows excessive element restriction.