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covered_wagon's avatar
covered_wagon
Explorer
Jan 03, 2016

Surprising Danger experienced With My HappiJacks

The circuit board went bad on my Happijacks so I had to switch to manual use using the crank. This essentially disengages the electric motor from the gears allowing manual use of the hand crank to the...
Truck Campers
covered_wagon's avatar
covered_wagon
Explorer
Jan 04, 2016
They are the 4500's. It's interesting that once I let the crank go it would continue to spin on it's own till I stopped it. Pulled out the crank when stopped and it got to lowering with the jack screw spinning inside on it's own. Scared the heck out of me but reacted fast to stop it and engage the electric motor for safety.

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