Engines | Mounts, , (GOOD USED/ RUN TEST/ FULLY INSPECTED) 1987 Caterpillar 3406B Diesel Engine (MECHANICAL FUEL PUMP), Serial # 7FB78922, AR # 7C9700, 400HP, TEST RUN WATCH VIDEO ON JJ REBUILDERS, Runs Perfect!!! Low Miles engine, Visit JJREBUILDERS for more information on this engine or any other diesel engine you may be looking for. Call 1-800-971-3019. INV # 004694