Maintenance and Restart Readiness Checklist

This guide is available view online, as a one page printable version or as a download Excel file.

Expert Advice - Steadfast Support

Charging Ahead! As the temperature drops and customers are returning coaches into service, MCI offers the following reminders for coach batteries:

Test voltage on each battery individually with multi-meter

  • If voltage reading on each battery is 12.4 volts or higher, charge is enough to start engine
  • If voltage reading is less than 12.4 volts, charge or replace batteries before starting engine
  • Remember, this is only telling you part of the story.

Inspect physical appearance, terminal connections and securement

  • Look for bulging sides, leaking, excessive contaminants on top – Replace or clean
  • Battery Terminal Connections must be clean and secured properly
  • Battery hold down secured properly
  • Battery Cable connections – As a reference, there can only be a voltage drop at a single connection of 1/10th of a volt. And a voltage drop on a on an entire branch of .5 of a volt.
  • Check the Electrolyte level and Specific Gravity of each Cell
  • Perform a load test – Only if all the above checks are satisfactory

Important Suggestions! –
Take the time and deal with dead or discharged batteries properly!

  • Jump or boost starting should be avoided whenever possible, especially when batteries are completely depleted, i.e. below ~10.5 volts
  • Alternators are designed to maintain batteries & electrical system, not charge them! Discharged batteries never fully recover and alternator life is diminished.
  • Onboard Inverter/ battery charger may not work with batteries below ~10.5 volts
  • Reminder – Batteries are the heart of the electrical network, if not properly charged with solid connections, any additional electrical system test are likely going to be skewed


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