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Old 09-14-2014, 12:48 PM   #1
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Clunking sounds

Hey guys, now that we are living in our CC full time, we are hearing a lot of clunking sounds. Sometimes it will do it while we are sitting still. Other times, it seems that when we move, we cause the clunk. I don't know if it is the hydraulics or frame making the noise. I've heard the usual noise from the hydraulics that you need the special oil additive for, but this is much louder. Do you think this is normal?
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Old 09-14-2014, 01:29 PM   #2
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A lot of possibilities.
Weight on suspension.
Settling, especially if you are not on a hard surface.
Welds popping on the overhang due to too many pairs of shoes in the bedroom wardrobe.

or the most likely cause...
Creek complaining about not being in Florida.
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Old 09-14-2014, 01:47 PM   #3
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I'm hoping for the later cause, Duck. We are full timers and we are heavy, so I do worry about structural. We also have been seeing some good temperature swings. We were in the 40's the other night and 50's last night. 70's to 80's during the day.
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Old 09-14-2014, 01:51 PM   #4
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We are also on gravel, but this place is mostly rock and I believe it is very solid.
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Old 09-14-2014, 03:10 PM   #5
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clicking sounds

I had this problem and we solved the noise by removing a quart of hyd oil and replacing it with a quart of "fork oil" obtained from a motor cycle shop.
We only had the problem when parked on our home concrete slab.

This was done with the instruction from cedar creek.

Do a search and you should come up with forum instructions.
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Old 09-14-2014, 04:59 PM   #6
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We noticed the same issue with our 34SB Touring Edition and finally came to the conclusion it was the result of expansion and contraction from temperature changes. When we were in FL for the winter we did not hear a single clunk. The temperature range you mention sounds like enough of a swing to cause it. I would look at temp 's, time of day/night, and locations before taking more drastic action. Ours always sounded like it was the frame under the LR, or occasionally the BR area.
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Old 09-15-2014, 03:05 AM   #7
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All too common with the level up system. We did the fluid additive that Lippert recommends, twice. Still popped some. What ESVA says has a lot to do with it. Temp change. We always heard / fealt it more as it warmed up in the AM, and cooled off in the PM. Either way, we solved ours with jack stands when we lived in it. 6 of them, one by each level up jack. Never popped or made any noise after that.

Attached is from Lippert on the popping noise.
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Old 09-15-2014, 09:15 AM   #8
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Thanks for the replies, y'all. I'll have to get the anti-stiction fluid and give it a try. This time and the last time when it made the most noise, it was when some of the hydraulic rams were nearly fully extended.
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Old 09-15-2014, 10:02 AM   #9
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I found if I am pushing the level up system too far (too much weight off the axles) I get the clunking. If I keep enough pressure on the axles, then I dont seem to have that issue with the leveling system clunking.
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Old 09-15-2014, 08:46 PM   #10
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It is likely stiction in the hydraulics - we have it now and then - temperature seems to have some impact. Also if I close one or more of the hydraulic room valves and close the other two rooms in, the remaining open room will creek/pop until I open the valve back up.
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