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Batteries give off flammable fumes that can explode resulting in personal injury. Prevent sparks near the batteries. They could cause vapors to explode. Do not smoke near batteries. Electrolyte is an acid and can cause personal injury if it contacts skin or eyes. Always wear eye protection when starting a machine with jump start cables. |
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When starting from another machine, make sure that the machines do not touch. This could prevent damage to engine bearings and electrical circuits. Turn on (close) the battery disconnect switch prior to the boost connection to prevent damage to electrical components on the stalled machine. Severely discharged maintenance free batteries do not fully recharge from the alternator after jump starting. The batteries must be charged to proper voltage with a battery charger. Many batteries thought to be unusable are still rechargeable. This machine has a 24 volt starting system. Use only the same voltage for jump starting. Use of a higher voltage damages the electrical system. Refer to Special Instruction, Battery Test Procedure, SEHS7633, available from your Caterpillar dealer, for complete testing and charging information. |
When the auxiliary starting receptacles are not available, use the following procedure.
- Determine the reason that the engine will not crank. Refer to Special Instruction, SEHS7768 on the use of 6V-2150 Starting Charging Analyzer Group. The procedure is applicable even if the machine does not have a diagnostic connector.
- On the stalled machine, place the transmission direction control in the NEUTRAL position. Engage the parking brake. Lower all attachments to the ground. Move all controls to the HOLD position.
- Turn the engine start switch key to OFF on the stalled machine. Turn off all accessories.
- Turn on the battery disconnect switch on a stalled machine.
- Move the boost machine so that the cables can reach the stalled machine. DO NOT ALLOW THE MACHINES TO CONTACT EACH OTHER.
- Stop the engine on the boost machine. If you are using an auxiliary power source, turn off the charging system.
- Check the battery caps for correct placement and for correct tightness. Make these checks on both machines. Make sure that the batteries in the stalled machine are not frozen. Check the batteries for low electrolyte.
- Connect the positive jump start cable to the positive cable terminal of the discharged battery.
Do not allow positive cable clamps to contact any metal except for battery terminals.
Note: Batteries in series may be in separate compartments. Use the terminal that is connected to the starter solenoid. This battery is normally on the same side of the machine as the starter.
- Connect the positive jump start cable to the positive terminal of the boost source. Use the procedure from Step 8 in order to determine the correct terminal.
- Connect one end of the negative jump start cable to the negative terminal of the electrical source.
- Make the final connection. Connect the negative cable to the frame of the stalled machine. Make this connection away from the battery, the fuel, the hydraulic lines, or moving parts.
- Start the engine on the boost machine. If you are using an auxiliary power source, energize the charging system on the auxiliary power source.
- Wait for a minimum of two minutes while the batteries in the stalled machine partially charge.
- Attempt to start the stalled engine. Refer to Operation and Maintenance Manual, "Engine Starting".
- Immediately after you start the stalled engine, disconnect the jump start cable from the BOOST SOURCE.
- Disconnect the other end of this cable from the stalled machine.
- When the engine is running and the charging system is operating, determine the cause of the failure of the charging system of the stalled machine.