Happijac 4600 jack broken

From truck camper university on this truck camper forum.


http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/22881036.cfm

Z-Peller wrote:
From truck camper university on this truck camper forum.


http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/22881036.cfm

Z-Peller,

Good information. Looks like what I need to know is there. Thanks.

Dave

It's a standard roll pin, available at most hardware stores. Because of the gap presented by the threads on the shaft, the pin is exposed to more moment than needed. Try to avoid full retraction under full power. The clutch on the motor does not protect the pin.

You might want to take apart the other jacks and see if the roll pins are damaged.

UPDATE: Happijac leg is happy it's back on the TC in good working order. Followed the tutorial on how to dismantle and re-assemble the leg.

It was the shear pin that had to be replaced. There are 2 for everyones info, but only one sheared. Because the Outfitter is a fairly narrow TC, the front tiedowns bars are only about 1'" from the jack legs so when the jacks are being retracted(all at once), the steel foot on the bottom hooked the bar and as I was on the other side, did not realize that there was a problem until the shear pin holding the screw to the cylinder snapped and the inner black square tube fell to the ground . Looks like the jack is very strong lifting things but not when retracting.

Luckily, the local RV shop had the right kind of shear pin so I was up and running fairly quickly after I resembled everything and attached the jack to the TC. Got to regrease everything. No rust. Now I know how to fix a Happijac jack.

Will consult for cold beer.

Dave

Front tie down bars? Frame mount Dave?
Will ask for rum and coke...

whazoo wrote:
Front tie down bars? Frame mount Dave?
Will ask for rum and coke...

Whazoo,

Nice to see that the old grey matter upstairs is still workin. Hope the rest of your parts are still OK, I mean the truck and Outfitter. How is the Boise Bougie treating ya?

Dave

This education never gets old,so happy to pass it on. I'm not sure how similar the jack was to this style but it does give you a good idea of what to expect. Grateful you got it fixed.

KKELLER14K

Yes we should all be paying you a royalty for that tutorial! Your time and effort to figure it out and document the repair has saved so many of us a great deal of angst and money.....thank you!

KKELLER14K wrote:
This education never gets old,so happy to pass it on. I'm not sure how similar the jack was to this style but it does give you a good idea of what to expect. Grateful you got it fixed.

The 4600 jack is not much different than the one in the tutorial. I was having a real problem removing "C" retainer clip until viewing your cloths hanger tool. Worked perfectly. Owe you big time.

Thanks

Dave.