SWITCH AS 4211898 - Caterpillar

Products With Electric Starting Motors (12, 24, 32, 64 Volt Systems)Reference: Service Magazine; April 25, 1988; Page 7; "New Procedure To Prime Fuel System Using Engine Starter" on Backhoe Loaders. Starter and battery life can be reduced, and sometimes immediate damage results from overcranking an engine (prolonged engagement of the starter motor). The following is a list of limitations agreed to by all of Caterpillar's starter suppliers. High parasitic cranking loads and/or incorrect engine oil viscosities may still cause starter damage even when following these guidelines. Even though machine batteries will become discharged during this procedure and require boost-starting, the same guidelines apply.
1. Crank the engine for no more than 30 seconds.2. Wait for 2 minutes.3. Repeat Steps 1 and 2 six times, for a total of seven 30-second cranking cycles.4. Wait for 30 MINUTES.5. Do Step 1 again.6. Do Step 2 again.7. Repeat Steps 5 and 6 three times, for a total of four 30-second cranking cycles.8. Wait for 30 MINUTES.9. Do Steps 5 through 8 as needed. These guidelines supersede those included in the reference article.