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Old 09-18-2007, 03:00 AM   #1
timandsusan
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Size of Hydralic Jack for Montana

What size hydralic jack do you carry to change tires on your Montana? I have a 3475 and am considering a 12 ton bottle jack. Any suggestions?
 
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Old 09-18-2007, 03:12 AM   #2
bncinwv
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I just bought a six ton bottle jack at Harbor Freight for $9.99 with coupon. I figured I had two 6000 pound axles so six tons should suffice for lifting up to half of the trailer (worse case) if need be while hooked up to TV. I think the 12 ton would do the job fine.
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Old 09-18-2007, 04:51 AM   #3
dsprik
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Six ton is plenty. They are very heavy and the higher they are rated the heavier they are. I have 2, 6 tons just in case one fails.
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Old 09-18-2007, 04:53 AM   #4
exav8tr
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Timand susan, I bought a 12 ton before I left Alaska and have used it twice now. works great, maybe a little overkill, but what the heck price was about the same for 6 vs 12 so I went with the bigger.
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Old 09-18-2007, 06:57 AM   #5
SlickWillie
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5 ton here. One I had for several years. I intend to buy a new one though, as I want one of the short ones. I'm afraid with a flat, the one I have might not go under the axle.
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Old 09-18-2007, 07:40 AM   #6
ARJ
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12 Ton. Lots easier to pump up!
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Old 09-18-2007, 12:51 PM   #7
stiles watson
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I have done several significant jobs with an 8-ton bottle jack including the shackle upgrade on 8.1al's rig today.
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Old 09-18-2007, 12:56 PM   #8
8.1al
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and that 8 ton worked just fine. If you just want to jack up an axle to change a tire a 6 ton is fine, if you want to jack up one side for suspension work, etc. you will be glad you have an 8 ton or larger
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Old 09-18-2007, 01:55 PM   #9
Redrover98
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I carry a 10 ton bottle jack, but have never used it to change a tire. I just roll the RV up on a couple of my leveling boards next to the flat tire. It will lift the flat tire enough to change and it is a lot quicker than getting the jack out and getting under the rig on the side of the road.
Works for me.
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Old 09-18-2007, 05:28 PM   #10
dsprik
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Redrover98, a while back, I mentioned on a thread that I would like to do this to change a tire on my rig - and then someone pointed out that would put the entire weight of that side of the rig all on that one tire - going way over the rating of that tire. I know there are several people that do this practice though, and I have not heard of any particular problem. Maybe the trouble comes from over-rated tires actually while they are moving down the road???
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Old 09-19-2007, 01:21 AM   #11
Redrover98
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dsprik,

Isn't all the weight of the RV on the good tire when the other one goes flat? I feel another 5-10 minutes while I change the tire quickly on the side of a highway would not put undue stress on a non moving tire. So far I have not had any problems.
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Old 09-19-2007, 02:38 AM   #12
nkwist
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I use a 6 ton jack but wish I had bought an 8 or 10 ton (it would be easier to jack up from the awkward positions I find myself in!). I use it to jack the Monty up to adjust the brakes. As far as raising the trailer with blocks, it's not a problem. The load rating is for a tire that's rolling, not standing still. It will take a much higher load. (and actually....if you find a flat, the remaining tire is already carrying the full load).
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Old 09-19-2007, 05:14 AM   #13
timandsusan
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Thanks again for great advice from the Montana site folks. I will get a 12 ton to solve future problems.
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Old 09-19-2007, 09:31 AM   #14
dsprik
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Quote:
quote:Originally posted by Redrover98

dsprik,

Isn't all the weight of the RV on the good tire when the other one goes flat? I feel another 5-10 minutes while I change the tire quickly on the side of a highway would not put undue stress on a non moving tire. So far I have not had any problems.
Redrover98, I believe running up on blocks can work. I would MUCH rather do this than jack anything up with my 2 bad shoulders. One problem with any jack is that you usually have to put a board down under the jack to get the proper height. I cannot work with my arms straight out and in front of me while on my knees... Very painful. I would love to find a scissors jack that I could power with a cordless drill.
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Old 09-19-2007, 09:54 AM   #15
bncinwv
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Dave,
Whenever you find a cordless dril that will lift 3-6 tons, let us all know!!! I know I would want one too!!
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Old 09-19-2007, 04:32 PM   #16
dsprik
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That's my dream... Only problem is that you need a scissors jack that can lift 6 tons. Then you need a drill that can handle the torque. Maybe I'll do some prototyping...
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Old 09-19-2007, 04:35 PM   #17
bncinwv
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You might get Ozz to help you out, I think from the gist of his latest posts that he is running out of things to do!!!!!!
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Old 09-19-2007, 04:48 PM   #18
dsprik
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Ozz will never run out of projects... just run out of Montana to work on...

Seems someone on the MOC had electric jacks under the axles somewhere...
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Old 09-22-2007, 10:03 AM   #19
rapidrobert
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I used ramps to raise each axle to adjust the brakes and it bent the axles at all four wheel. I had to replace the axles as a result. I strongly recommend that you not use ramps to change tires or adjust brakes...
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