1. TRACTORS 2. AGRICULTURAL 3. OVER 100 HP 4. (3688) - INTERNATIONAL DIESEL TRACTOR (1/81-12/86) 5. Power Select section Power Case: (12-03) - POWER, AIR CLEANER AND EXHAUST, 3688 AND 3688HC TRACTORS (12-06) - POWER, SPARK ARRESTER ATTACHMENT (12-07) - POWER, FUEL PIPE AND CONNECTIONS, TRACTORS WITHOUT AUXILIARY FUEL TANK (12-09) - POWER, MAIN FUEL TANK AND SUPPORTS (12-11) - POWER, GOV CHOKE AND FUEL SHUT-OFF CONTROLS (12-12) - POWER, ETHER STARTING (12-12[A]) - POWER, CRANKCASE WATER HEATER (12-13) - POWER, AUXILIARY FUEL TANK AND SUPPORTS (12-15) - POWER, AUXILIARY FUEL TANK CONNECTIONS, 3688 AND 3688HC TRACTORS WITH AUXILIARY FUEL TANK sale parts diagram catalog online construction equipment excavator tractor Truck sale: