OM4203 Automatic Lubrication System - Section 42 42-7 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 injec- tor and pump until grease appears at the far end of the individual grease hose or the joint being greased. Filter Assembly The filter assembly element (5, Figure 42-5) should be replaced if the bypass indicator (2) shows excessive element restriction. FIGURE 42-5. FILTER ASSEMBLY 1. Housing 2. Bypass Indicator 3. O-Ring 4. Backup Ring 5. Element 6. Spring 7. Bowl 8. O-Ring 9. Plug