Last week, Bruce Purkey continued his winter preparation webinar series by sharing with us some tips and best practices for readying liftgate systems for winter.

In his webinar, Bruce gave a simple, three-step process for preparing liftgate charging systems for winter:

  1. Test the Batteries
    • Make sure the OCV is 12.4 volts or higher.
    • Take the cables off the battery posts.
    • Clean the lead pad area.
    • Install lead adaptors.
    • Use a good battery tester and test each battery in the box.
    • Keep good batteries and replace defective ones.
  2. Test the Charging System to the Liftgate Batteries
    • Use an adaptor that allows you to connect to the liftgate batteries.
    • When using a DC/DC converter, use the Purkeys bypass adaptor.
    • Pull a 20-amp load for the liftgate batteries and measure the voltage at the liftgate and at the front at the same time. You are allowed a two-volt drop.
    • If circuit passes, move on. If circuit fails, repair the circuit.
  3. Test the DC/DC Converter
    • Use a voltmeter to determine the OCV of the liftgate batteries.
    • Use a clip-on ammeter around the charging cable from the DC/DC converter.
    • Plug in the charging cable from the tractor and start the tractor.
    • You will see the voltage rise and current flow.

To view the complete webinar and see step-by-step pictures of the three-step process, you can access the on-demand version here. Just enter your name and email for free access.

Have any questions about preparing your heavy-duty vehicle for winter? Let us know in the comments below!