Will the Drive Head Motor From a HappIJac 4150 Work With the 4220 Jack  

Yes, we have confirmed this with Lippert/Happijac before. The replacement leg part #LC736514 will work on your Happijac 4150 system.

The only replacements parts we currently offer are just the gears #LC182851, which you said most likely isn't the cause. It does sound like something is binding up inside of the gear housing so I would at least try to take apart what you can to…

Yes, the Replacement Jack for HappiJac Truck Camper Jack System part #LC736514 (Model 4220) will fit your HappiJac Truck Camper Jack System Model 4150. If you need a new gearbox/motor then we have that as well, the Replacement Motor and Gear Head…

We have replacement legs for the HappiJack truck camper systems like the part #LC736515 which has 36-1/2 inches of lift and a 2,800 lb capacity as well as the #LC736514 which has 34-1/2 inches of lift and a 2,200 lb capacity but the legs themselves…

In order to replace the motors on the HappiJack Truck Bed Camper Jacks 4150 and 4500 you'll need an update kit, the Manual-to-Electric Conversion Kit for HappiJac Truck Camper Jack Systems part #LC733960-182524 which comes with new motors and…

The heads that come with the Replacement Motor Heads w Circuit Board and Remote #LC733960 measure 9-1/8" from the bolt hole that connects them to the legs up to the topmost part of the motor (see attached). Hopefully this will be enough…

The Manual-to-Electric Conversion Kit for HappiJac Truck Camper Jack Systems #LC733960-182524 is only available in the straight head version.

The Manual-to-Electric Conversion Kit for HappiJac Truck Camper Jack Systems #LC733960-182524 is compatible with with your 4150 model but not the 4500 so you would need to replace them system. The HappiJac Manual Truck Camper Jack System #LC736514-4…

The dimensions I can find online for a GC6AA-10E show it needing a 16" x 16" door, but there are plenty of outliers out there that can require different sized doors so it's best to measure what you current have and then find the…

The Dometic RV Water Heater - Gas - Automatic Pilot - 12 Volt - 8,800 Btu - 6 Gal Tank Item AT96121 is the direct replacement for the GC6AA-10E. Unfortunately it is out of stock with no expected restock date. Instead I recommend the Furrion RV…

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.