New Style Vertical Motor Happijac Spy Photos
These new style Happijac vertical motor jacks were on Lance campers recently shipped to dealers. It appears they have the jack leg release lever. I would like to get a look at th...
Forum Discussion
Anybody remember that's how Atwood attached their motors? Since Atwood is now Dometic and since it appears Dometic isn't marketing camper jacks, I wonder if there was some previous patent that prevented Happijac from doing this sooner...
I just checked mine and even with me almost standing on the jack foot I couldn't get the leg to drop with the lever in the free position. Maybe if all the gears are aligned just right, and we're at a specific phase of the moon, the leg would drop. Or, maybe it's the difference between the Acme-screw, what I have (HJ-4150), and the ball-screw that lets the leg drop. In either case, I leave mine in the lock position to use the electric motors all the time. I only discovered the lever uncoupled the motor when I had a motor seize and needed to get the camper off the truck.
wnjj wrote:BradW wrote:DWeikert wrote:
That lever is on my older HJ's. It just disconnects the motor so you can use the hand crank if you have motor problems.
I did not know that was the function of the lever. I assumed it was the quick release for the jack leg.
Any way to tell from the photos if they are acme-screw or ball-screw?
On some models, the lever is for both of those purposes.
I think they only used acme on the lightest rated jacks in the past. I have to imagine it’s ball-screw.
I just checked mine and even with me almost standing on the jack foot I couldn't get the leg to drop with the lever in the free position. Maybe if all the gears are aligned just right, and we're at a specific phase of the moon, the leg would drop. Or, maybe it's the difference between the Acme-screw, what I have (HJ-4150), and the ball-screw that lets the leg drop. In either case, I leave mine in the lock position to use the electric motors all the time. I only discovered the lever uncoupled the motor when I had a motor seize and needed to get the camper off the truck.
