HappiJac 4150

[Pauls130]

Hi Folks. One of my jacks on my Ranger






has stuck at full extension. This one has been giving trouble for a bit so might replace rather than repair. It appears to have sheared the gear mesh at the top of the Jack. Does anyone know if there is a UK dealer.

Many thanks Paul

[zildjian]

Hi paul, I've shared this on our Facebook community
as well for best coverage

[Big Jim]

One of mine failed . They have a large nylon "nut" at the top . I dismantled it and investigated repairs . Happijack would not supply me and remaking wasn't cost effective. I bought a new one from Niche Northstar dealer 01507 327172 . I think £270.
I prefer not to use the motors too much , it is too easy to go too far . Doing by hand you can feel when they are struggling .

[zildjian]

"To be more specific the head of the screw tread in the jack has sheared. Looks like the mounting plate inside the jack is bar tack welded on assembly so repair doesn't seem possible"

[Big Jim]

You can get it apart by relieving the staking at the top of the leg . It will come apart , but it is a fight , but I don't know how that will help you unless you think it would weld back on. Be careful , there is a square plate around the threaded bar at some pint which is supposed to jam the leg if it fails .I can't remember where it goes and its easy to not see .

[zildjian]

"so some further dismantling this morning. The top pin is a separate part"

[digger.walker]

Paul, you might find Niche Marketing ( if they still call themselves that) might be of assistance. I had an overextended Jack and the engineer was able to relocate the thread after a while.

[Pauls130]

I forgot to update on this but a local engineering company sorted me out. I rebuilt the jack and it works perfectly.

Hébergeur d'images

[zildjian]

Paul can you tell me what the upshot was on this leg in the end?