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Old 07-11-2010, 05:42 PM   #1
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1970 27' Overlander
new haven , Connecticut
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Automatic power jack on my 1970 Overlander Airstream will not work....

hi
I am having problems raising my RV, my automatic jack will not raise. I changed my 20 volt curcuit breaker, and just put in a new battery, any ideas?

thank you!
Richeille CT
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Old 07-11-2010, 05:47 PM   #2
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1977 27' Overlander
1973 27' Overlander
1963 19' Globetrotter
Naples , Florida
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Are you getting power to it,it should have a fuse near it there. Dave
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Old 07-11-2010, 05:50 PM   #3
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1970 27' Overlander
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well its a sealed post with no way of getting inside, I also have no power on my water pump, or the light in the front cabin doesnt work, so I am wondering if a fuse is gone somewhere that runs the front of the airstream
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Old 07-11-2010, 05:51 PM   #4
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Richeille,
I guess you are talking about the power jack on the trailer tongue?

If this is the case, get a center punch and pop a spot between the frame on the trailer tongue and the base of the power jack. It could be a bad ground between the two. The power jack's base is the ground.

Dan
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Old 07-11-2010, 05:52 PM   #5
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1970 27' Overlander
new haven , Connecticut
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do you not think its related to the other things not working? I am wondering if a fuse is to blame, it seems that the whole front end of the trailer is having power loss
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Old 07-11-2010, 06:25 PM   #6
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1977 27' Overlander
1973 27' Overlander
1963 19' Globetrotter
Naples , Florida
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If your 70 is like my 73 the panel is in the closet ,just front of the tub,you may want to get multimeter and check all the fuses.The jack will have it`s own fuse. Dave
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Old 07-11-2010, 07:20 PM   #7
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1970 27' Overlander
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thanks Dave, In the closet is 2 20 amp breaker fuses, that I changed, but there's a main circuit with more fuses?
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Old 07-12-2010, 08:43 PM   #8
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1977 27' Overlander
1973 27' Overlander
1963 19' Globetrotter
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It should be near your converter. Dave
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Old 07-13-2010, 12:17 AM   #9
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1970 27' Overlander
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thanks Dave, It would seem that its probally my Univolt that needs replacing, believe it or not its the original still! also makes sense thats why my new battery wont hold a charge. I have to say tho, they dont sell 'univolts' anymore, its now a $300 new gadget to replace which kinda sucks, but at least I wont have the humming sound anymore!
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Old 07-13-2010, 12:24 AM   #10
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1978 31' Excella 500
Goose Creek , South Carolina
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Check your 50 amp 12v fuses near the univolt. Last time I lost jack, battery charge and I forgot what else, that was the problem.
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Old 07-13-2010, 01:14 AM   #11
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Morada , California
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Have you investigated the fact that this old part might just be worn out?

Years of use, will wear greatly on the DC motor that sometimes has to strain under the load...the motor brushes wear out, and the segments on the armature wear away as well - this situation also causes the motor to 'demand' more amperage to run, and can cause blown fuses, heated wiring, etc...

The gears inside the jack also become worn with age making a greater strain on the motor as well...

When we bought our 78 a couple of years ago, the jack was having a hard time doing it's job, and it's the first thing I replaced - what a difference!

You can usually find 'specials' on these jacks if you search around the web...nothing worse than to have an item like this fail when you're out trying to have fun...

Ray
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Old 07-28-2010, 07:00 PM   #12
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1976 31' Sovereign
Greenwood , South Carolina
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Is there any way to rebuild jack post? My motor runs fine but my jack binds when you raise the foot for travel.
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