The front jacks run at different speeds.Its an 09 Keystone Everest. A single motor system with the long square bar that extends to the other side. The motor side, right side (door side) runs the jack down much slower than the left side, (driver side).The system does not seem bound up or any loud gear noise. It works fine with the exception if the slow side (right) extends down 2-3 inches the left extends 4-5 inches. I have been adjusting this with blocking.Then when leaving, its the opposite. After retracting the jacks, the motor side is fully up and the other side (driver side) is still 2-3 inches down. So to leave & get the left side back up, I take the bar off the motor & spin that side back up by hand.I bought the rig new & never had any problem until this started late last year. Confused yet? Any Idea's ??I don't want to buy a new motor if its the jacks and I don't want to buy new jacks if its the motor. Thanks for any help.....

Yes, a little confusing. If you disconnect the motor and bar to manually make legs the same, they should stay close to the same. Do you possibly have a broken/missing tooth on the upper gear on one side?Jerry

Well, it wouldn't be the motor as that wouldn't affect one leg separately from the other. My guess is that the leg that is slower has bad gear teeth in the 90° spur gear at the top of the leg. Easy to check, pull the plastic cap off the top of the leg and take a look. Spin the drive and see what happens. Even though you don't hear it, it probably skips a tooth or two every revolution.

Have you greased or lived either leg? Sounds like needs some new grease

Some kind of stripped gear is the only logical answer. What's surprising is you don't hear any pops or other noises as the gears slip.

I have had the bolt come out of opposite side of the motor, of course only the drive side moves. Thats not the case here. Being that they are both geared the same ,they have to move at the same speed, as said take the cap off ,and see if some teeth are missing. You would think you could hear some unusual noise, it just about has to be skipping gears or missing teeth . Could be the worm gear ,but they usually get messed up, and bind up, then nothing wants to move, or you can hear the strain, but they still move at the same speed .

Front Landing Jacks Speed | Good Sam Community

honda1
Explorer
Jun 24, 2019
roll pin sheared at one of the top bevaled gears .
Whiskey_River
Explorer
Jun 23, 2019
OK thanks everyone, it appears the general consensus is legs & not the motor. I will take off the cap & check next week end.
I know both legs should run at the same speed & they did for years. I also can sit on the ground & press the extend switch & visually watch the left (drivers side extend faster than the other side.
And one side is not cranked up higher than the other side. I have the top marked with a sharpie on both sides.
As I said in the original post the opposite happens when lifting or retracting the legs. The right side gets to the top, ie the sharpie mark and I stop as don't want to over run that side and the left side is still 2"-3" from reaching the sharpie mark. I then disconnect the square rod and roll the left side up to the sharpie mark. So when starting to extend the legs they are both at the same starting point. And I put the legs both down 5 or 6 holes (both the same on the drop down before starting the power.
I know this makes no sense but you can't make this up.
I'm not an RV tech but have always done my own work. Some being installed a wet bolt system, repack wheel brgs every couple years, installed 2nd A/C in bedroom, toilet gaskets & other stuff. This has me baffled…...
MFL
Nomad II
Jun 23, 2019
Hopefully the OP will return to let us know. There is always a little noise, when running the landing gear, so a missing/broken tooth may go unnoticed. Now jumping teeth, pretty hard to not hear that!

Jerry
fj12ryder
Explorer III
Jun 23, 2019
But if the gear is slipping on the shaft, it would have to be catching periodically also. That would generate noise too.
Jon_L
Explorer
Jun 23, 2019
If its not making noise the problem could be that the gear is slipping on the shaft.
fj12ryder
Explorer III
Jun 23, 2019
cummins2014 wrote:
fj12ryder wrote:
B.O. Plenty wrote:
The way they are built I cannot see how they can run at different speeds. They have the same gearboxes and run off the same motor. My guess is one is cranked up farther than the other so it looks like one is slower than the other. Disconnect the tube that connects them and make sure each is starting from the same place.
B.O.
I don't believe they are actually running at different speeds. But if one leg skips a tooth on the 90° bevel gear every revolution, then it will fall behind the other leg.

Yes, but would that not be making some unusual noise, never have had that happen ,so don't know .
It sure should. But it's about the only thing that makes any kind of sense.
cummins2014
Explorer
Jun 23, 2019
fj12ryder wrote:
B.O. Plenty wrote:
The way they are built I cannot see how they can run at different speeds. They have the same gearboxes and run off the same motor. My guess is one is cranked up farther than the other so it looks like one is slower than the other. Disconnect the tube that connects them and make sure each is starting from the same place.
B.O.
I don't believe they are actually running at different speeds. But if one leg skips a tooth on the 90° bevel gear every revolution, then it will fall behind the other leg.

Yes, but would that not be making some unusual noise, never have had that happen ,so don't know .
cummins2014
Explorer
Jun 23, 2019
B.O. Plenty wrote:
The way they are built I cannot see how they can run at different speeds. They have the same gearboxes and run off the same motor. My guess is one is cranked up farther than the other so it looks like one is slower than the other. Disconnect the tube that connects them and make sure each is starting from the same place.
B.O.

Have had to do that, when working on them, but hopefully he has done that, but yes makes no sense they are running at different speeds, just can't. The big question if they are just uneven, how would they have got there in the first place.

I had the bolt come out , and then just adjusted the drive side, to match the other side when I noticed one side was not going up. Then put in a new bolt. Thats about the only way they would get uneven.
fj12ryder
Explorer III
Jun 23, 2019
B.O. Plenty wrote:
The way they are built I cannot see how they can run at different speeds. They have the same gearboxes and run off the same motor. My guess is one is cranked up farther than the other so it looks like one is slower than the other. Disconnect the tube that connects them and make sure each is starting from the same place.
B.O.
I don't believe they are actually running at different speeds. But if one leg skips a tooth on the 90° bevel gear every revolution, then it will fall behind the other leg.
B_O__Plenty
Explorer II
Jun 23, 2019
The way they are built I cannot see how they can run at different speeds. They have the same gearboxes and run off the same motor. My guess is one is cranked up farther than the other so it looks like one is slower than the other. Disconnect the tube that connects them and make sure each is starting from the same place.
B.O.

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