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Old 11-18-2013, 12:40 PM   #1
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Hydraulic leak

Just discovered this leak.Can someone tell me the function of this cylinder device? The leak is coming from the in line on the back end. Once I got my head back in there I could see that someone had rapped some silicon tape around it at one time. This device is located in the battery bay on the right side wall and I don't know what it is yet.Click image for larger version

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Old 11-18-2013, 01:40 PM   #2
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Hello Jim the cylinder that is pictured is a HWH sync cylinder. It is designed to move the rams for a slide in and out evenly so the slide will not bind.
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Old 11-18-2013, 01:43 PM   #3
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Looks like the synchronizing cylinder.
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Old 11-18-2013, 02:16 PM   #4
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Yep! That's what it is. I'll have to clean it up and and re rap it with silicon tape until I can get it to Mr. Fix it this Spring. Thanks for the info guys.
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Old 11-18-2013, 07:58 PM   #5
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Jim, there's another equalizer for the front living room slide. I've had it start leaking and luckily the dripping didn't damage anything important. The living room equalizer is mounted along the passenger side of the chassis rail in the first curb side compartment. I had mine replaced and then the top fitting started leaking and to have the line replaced. Just an FYI.
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Old 11-18-2013, 08:25 PM   #6
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Well what I thought was red silicone tape turned out to be color ID tape from the factory. I'll try to snug up the hose fitting. But I have a feeling a new or rebuilt equalizer may be the fix.
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Old 11-18-2013, 08:29 PM   #7
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For a better temp fix, wrap the silicon tape as tightly as you can then top it w/a hose clamp or two side by side close to the leak
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Old 11-18-2013, 08:50 PM   #8
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When I get back from Turkey day I will be replacing my burnt out 40 amp fuse holder and then I can locate exactly where the leak is. It appears like it's at the fitting and I don't know if silicone tape would help. The coach is in hibernation so I'll have plenty of time to tinker and curse, sure glad these things happened in my shop rather than out on the road.
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Old 11-19-2013, 01:16 PM   #9
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After getting a better look at the equalizer and hose the problem is the hose fitting on the hose. It's leaking just behind the second 5/8 hex. Hose part # is AP4756. I've been waiting over 3 hours for HWH to call back. I can't find the part looking at their online catalog. Just wondering if these ends are repaired or does the entire hose need replaced?
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Old 11-19-2013, 01:34 PM   #10
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There is a lot of pressure on that hose when operating so if the end is rusty at all you need to replace the hose. I had the end blow off my generator slide hose and the mess was unbelievable. The hoses are WRV specific so I had a local shop make up a replacement for me. The fittings are industry standard.
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Old 11-19-2013, 07:17 PM   #11
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PirtekUSA.com has locations all over and can make hoses, sometimes at your site.
If this is a 1/4" hose, you could try a "field fitting", see post#11 in that last link for nice photos courtesy of WayneR.
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Old 11-20-2013, 10:11 AM   #12
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Quote:
Originally Posted by tiredvet View Post
After getting a better look at the equalizer and hose the problem is the hose fitting on the hose. It's leaking just behind the second 5/8 hex. Hose part # is AP4756. I've been waiting over 3 hours for HWH to call back. I can't find the part looking at their online catalog. Just wondering if these ends are repaired or does the entire hose need replaced?
I need to correct the part number for the hydraulic line, It is AP4729 25" x 280" and can be purchased at HWH for $102.00. This line dose not follow the ones along the pass frame rail, it goes into the engine bay with the line from the jack and from there I'm not sure yet.
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Old 11-20-2013, 02:34 PM   #13
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At 280" I'm pretty sure it routes to the HWH compartment direct (23'-4").
I'd check the hex connection. Its a beveled steel seat, it should stop fairly hard when it makes contact and then take a short snugging turn to make a good seal. If you still bet leakage, its either a buggered bevel or leaking at the hose. If at the hose, I'd clean it well & do the rescue tape/hose clamp for a temp, then wrap that w/a wrag I could check & change till I got a real fix.
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Old 11-21-2013, 08:13 AM   #14
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if its the hose connected to the back end of the sync cylinder, its the supply hose from the manifold to the sync cylinder. it does not have to be that exact length. the two hoses connected to the side of the cylinder are the ones that have to be the same length. that hose can be either 1/4 or 1/8 in diameter. either one will work. what is there now is synflex 1/4 hose. you can order it from hwh, or have it made locally. just make sure it is rated over 3500 lbs. your pump runs at 3200 lbs.
btw, ask what the warranty on the hose is. hwh gives a one year warranty,
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