Series 638 – Section 15.1 Low Battery Voltage

Section 15.1
Low Battery Voltage

To determine if low battery voltage is causing the engine to crank slowly or not crank, perform the following steps:‪

Explosive gas may remain in or around the battery for several hours after it has been charged. Sparks or flames can ignite this gas causing an internal explosion which could shatter the battery. Flying pieces of the battery structure and splash of the electrolyte can cause personal injury. The battery electrolyte is an acid. Extreme care should be exercised to avoid skin or eye contact with the electrolyte. If you come in contact with battery electrolyte:‪ Flush your skin with water. Apply baking soda or lime to help neutralize the acid. Flush your eyes with water. Get medical attention immediately.

1. Measure battery voltage.
   1. If the voltage is less than 10.5 volts, replace the battery. Refer to "15.1.1 Replacement of Battery" .
   2. If the voltage is between 10.5-14 volts, check for no voltage to the starter solenoid. Refer to "15.2 No Voltage to Starter Solenoid" .

Section 15.1.1
Replacement of Battery

Replace battery as follows:‪

1. Remove the battery; refer to OEM guidelines.
2. Install a new battery; refer to OEM guidelines.
3. Verify repairs. Refer to "15.1.1.1 Test of Engine with Replaced Battery" .

Section 15.1.1.1
Test of Engine with Replaced Battery

Perform the following to determine if the replaced battery resolved the fault:‪

1. Attempt to start and run the engine.
   1. If the engine failed to start and run, check for no voltage to the starter solenoid. Refer to "15.2 No Voltage to Starter Solenoid" .
   2. If the engine started and ran, no further troubleshooting is required.