OPERATING THE ENGINE Disconnecting the booster batteries 1. Disconnect black negative (–) cable (2) from the machine frame first. 1 (Red) 2. Disconnect the other end of black negative (–) cable (2) from the booster batteries. 3. Disconnect red positive (+) cable (1) from the booster batteries. 4. Disconnect red positive (+) cable (1) from the machine batteries. Booster Batteies Machine Batteies (Black) To Upperstructure of the Machine 2 Connecting the Booster Batteries M104-03-002 3-9