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Old 01-10-2013, 11:35 AM   #1
Rich
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Grease landing gear

How do u grease the landing gear/jacks? And what kind of grease should you use? I was looking and it looks all sealed up. Is there a grease fitting somewhere. That would be nice. Thanks
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Old 01-10-2013, 11:52 AM   #2
davidjsimons
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You can always drill and tap the housing where the gears are. I've done this before and just use chassis grease.


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Old 01-10-2013, 12:22 PM   #3
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So if I don't want to tap in. Should I just grease the legs. Really looking to grease the part going up and down. So the gears that do the job their not sitting in a bath of grease. Is there any lubrication?
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Old 01-10-2013, 12:30 PM   #4
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I would not grease the leg. Dirt is going to get all over them when you have them down.


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Old 01-10-2013, 12:38 PM   #5
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On most .... a single screw or spring clip will remove the cover from the top of the lead leg and the follower leg. A little grease goes a long way on those gears. The gear box and motor are usually sealed. As for the legs, if you feel you must lube, try silicone spray, grease may pick up sand and grime and do more harm than good. This is just my opinion and what I do with mine, Hank
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Old 01-10-2013, 12:45 PM   #6
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My advice was geared more toward the manual jacks. I just want to make that clear.


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Old 01-10-2013, 02:23 PM   #7
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Thanks for the advice. It looks like previous owner used grease on the legs. So I just thought you were suppose to. So do u think it would be better to scrape the old crap off.
Good to know that the box is sealed
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Old 01-10-2013, 02:25 PM   #8
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Another question bout the jacks is that the fuse blows. I have never made it go up as far as I needed to without the fuse blowing. Have a good battery just charged it up.
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Old 01-10-2013, 02:37 PM   #9
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I would clean the grease from the leg if it were me. Check if the fuse is the correct size. The previous owner may have just put in what they had on hand.


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Old 01-11-2013, 04:32 AM   #10
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I agree clean the legs and check to see if the fuse is the correct size and you may want to replace it with a cuircit breaker type fuse.
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Old 01-11-2013, 05:14 AM   #11
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Mine has a grease fitting near the top of the landing gear tube.
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Old 01-11-2013, 07:46 AM   #12
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Most have fittings at the top for the gears to stay lubed but not all have them for the lower tubes,We have the level up system so all I do is spray a little lube on the from time to time trying not to get them all messy.
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Old 01-11-2013, 08:48 AM   #13
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It's a 30 fuse. Is that the correct size?
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Old 01-11-2013, 09:02 AM   #14
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If you're referring to the landing gear fuse yes, it's 30A.
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Old 01-11-2013, 09:23 AM   #15
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Depending on the size of the motor, the fuse could be either 20, 30 or 40 amps. Mine is 20 AMP, most midsize are 30 AMP but some larger fifth wheels and toy haullers are 40 AMP.

If you can find any identification on the wire, that may help. A general "rule of thumb" for DC fusing is:

6 gage 40 AMP
8 gage 30 AMP
10 gage 20 AMP
12 gage 15 AMP
14 gage 10 AMP
16 gage 7.5 AMP
18 gage 5 AMP

There are some charts that have larger fuses, some that recommend smaller fuses. The chart I used to get this information is a "middle ground" and takes into consideration wires in a bundle or in a conduit (less cooling available) and wires in a "moderate length run". The longer the wire, the bigger the voltage drop so the bigger the wire needs to be to prevent loss of power and increased current flow.

On my front jacks, the outer tube hangs about 3" below the RV belly and then the inner jack with pin holes hangs about 2.5 to 3" below that, so my jacks actually are about 5 or 6" below the belly.

The fuse is a safety feature not only to protect the wiring from overheating, but also to protect the gears and the motor when you reach full travel up or down. The fuse is designed to blow when the motor stops to prevent the gears from binding and being damaged. Replacing the fuse with a larger one to get the gear up a little more will likely cause binding and gear damage.

I'd look for markings on the wire with the fuse holder in it. And size the fuse according to the chart above.

I got this chart at the following URL:

http://www.emrg.ca/dc_wiring.htm
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Old 01-11-2013, 02:31 PM   #16
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I had the same prob with my landing gear.If I raised it all the way up to stop it would blow a fuse.I put a mark on the leg before the top,maybe 1-4 inch down and had no more trouble.
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Old 01-12-2013, 06:52 AM   #17
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That's a good point. So u think when raising it it maybe out of lift? But if thats the case the legs aren't very long. Does anybody know how long legs are? I have a 373 toy hauler.
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Old 01-12-2013, 08:48 AM   #18
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Mine only has about a 20" travel with another 18" or so on the inner extension leg. So, yours should be about that same length, maybe a couple of inches difference, but you're not going to get 5 or 6 feet of travel.
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