I have a couple of JDI fuel storage tanks with 12V pumps and wanted a better (easier) way to provide power to them when filling up the tractors. A member here has done something a lot more elegant that this (I forget which member), but I wanted to use what I have on hand and now I have a simple and effective way to power the pumps when needed. I'll leave this contraption inside the storage tank(s) and simply bring a charged battery with me when needed.
I'll start at the end with a DeWalt cordless drill that I've had for close to 30 years. The original batteries passed away a long time ago, so a few years back I ordered some generic 12V batteries from Amazon. The original charger shown below will only charge 12V batteries, and like many here I have lots of 18V and bigger batteries with numerous chargers that are all backwards compatible with the old 12V stuff. For this reason I had no problem with modifying (breaking) the original charger.
I staggered the alligator clips (from an old, deceased battery charger) so that they won't touch when connected to the pump alligator clips. I won't typically insert the battery until I've connected the clips to prevent a short.
This project was easy enough. I opened up the plastic housing, clipped off the two wires connected to the circuit board, soldered them to the appropriate pins on the underside of the board, ran the wires up and over and through the strain relief and buttoned the housing up. Some solder, heat shrink and the usual pack rattery I got it done and will use it this afternoon to refuel the MX.
I'll start at the end with a DeWalt cordless drill that I've had for close to 30 years. The original batteries passed away a long time ago, so a few years back I ordered some generic 12V batteries from Amazon. The original charger shown below will only charge 12V batteries, and like many here I have lots of 18V and bigger batteries with numerous chargers that are all backwards compatible with the old 12V stuff. For this reason I had no problem with modifying (breaking) the original charger.
I staggered the alligator clips (from an old, deceased battery charger) so that they won't touch when connected to the pump alligator clips. I won't typically insert the battery until I've connected the clips to prevent a short.
This project was easy enough. I opened up the plastic housing, clipped off the two wires connected to the circuit board, soldered them to the appropriate pins on the underside of the board, ran the wires up and over and through the strain relief and buttoned the housing up. Some solder, heat shrink and the usual pack rattery I got it done and will use it this afternoon to refuel the MX.
