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Old 09-19-2017, 11:03 PM   #1
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Default hydraulic system maintenance

what all has to be done to maintain the system?...grease points?...do the cables require lube?...any other places need lube or service?
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Old 09-20-2017, 12:02 AM   #2
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Clean and grease the guide rod. Lube the cables all the way from the adjusting bolts to where they attach to the top. Lube the pulleys. Check for leaks. Keep the reservoir filled to within 1" of the top with the top DOWN, using Dexron II-V fluid.

- Jack
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Old 09-20-2017, 12:04 AM   #3
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thanks jack...how do you get access to the adjuster bolts where they attach to the top?
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Old 09-20-2017, 08:05 AM   #4
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keystone, On the street-side (drivers side), you'll see four bolts with two nuts on each. On some Hi Los the bolts are in front of the tires, others, they are located between the dual axles. Mine has dual axles and are in front of the tires. From that point, I lube the cables, grease the pulleys and continue to where they go up the sides. Then I go to the rear section and start at the bolts again and complete the rear. I then raise the top and do it all again. This allows access to the cable sections that were over the holding tanks, for example. On the outside, with the top raised, locate where the cables enter the top section. inside, remove the trim boards covering those areas and lube both sides of the pulley. In Naval Aviation, we used a light sewing machine oil, which penetrates the cables through capillary effect. I do this two times a year and lube the upper pulleys several times more. Remember, the oil will "absorb" while just sitting there.
The guide rod is just a chunk of steel rod that is VERY important! It must be kept clean, rust free and well greased. Any burr that develops must be removed because this will interrupt the smooth travel required. It's silly, but informative, if you lay under the piston area and have someone raise and lower your unit. You'll understand a lot more than "reading" about it or guessing it's action.
Hope all this helps,
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Old 09-20-2017, 09:20 AM   #5
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Default Hi-Lo Video Manual

I suggest you view the the video manual, it will answer at least part of your questions. #34 covers the lift system lubrication.

http://www.hilotrailerforum.com/f49/...-youtube-1233/
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Old 09-20-2017, 10:21 AM   #6
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Quote:
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thanks jack...how do you get access to the adjuster bolts where they attach to the top?
Thanks for catching me on this, keystone! I was not very clear in my writing, was I? The adjusting bolts DO NOT attach to the top.

I MEANT to say, Lube the entire length of the cables, starting where they attach to the adjusting bolts and continuing along the cables until you reach the point where the cables attach to the edge of the top of the trailer. The reason you lube the cables is to clean them and to prevent corrosion which will eventually cause cable failure.

I've found the best way for me to reach the cables near where they attach to the trailer top is to remove the interior trim strips on the bottom half. This will expose the upper pulleys and will allow you to see how the cables look in that area. I may be wrong, but I THINK most cable failures occur near the ends at the top pulleys.

With the trim strips off, you can also see how well your bulb seal meets the "lip" on the lower half with the top up and you will be able to see if cable adjustment is needed.

Hope this clarifies things, and thanks again.

- Jack
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Old 09-20-2017, 11:07 AM   #7
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Default Jet-Lube Wire Rope Lubricant

" In Naval Aviation, we used a light sewing machine oil, which penetrates the cables through capillary effect. I do this two times a year and lube the upper pulleys several times more. Remember, the oil will "absorb" while just sitting there."

Treeclimber, that statement about the oil being absorbed by the cables was so vivid when I was lubing my cables recently. I used a product called Jet-Lube Wire Rope Lubricant.

https://www.amazon.com/Jet-Lube-Wire...wire+rope+lube

I was under the trailer gently spraying this lube on a horizontal section of cable. I got a little too much on the cable and saw a drop form on the bottom of the cable. It grew as some of the product gathered at that drop and was just about to fall to the ground when I saw it get sucked back up and disappear into the cable!! It was dang amazing to see the power of capillary action! I'll be sure to keep a can of this stuff around!!!

Glad you guys were OK with Irma!

Good luck!
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Old 09-21-2017, 08:27 AM   #8
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piperjim, Jet Lube also makes dielectric grease for all our contact points. I keep a tube of this on board for the 7-pin plugs and the shore power plug, battery posts, camera plugs, etc. Great find on amazaon.
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Old 10-16-2017, 01:18 AM   #9
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Do you spray the Jet Lube product on the full length of the cables? Or does it’s”travel” on its own and get dispersed that way? Also, what product do you use on the road? I’m placing an order on Amazon for the Jet Lube referred to above (and the 7 pin stuff), and I know I need to lube the guide rod. Thanks guys!
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Old 10-16-2017, 08:58 AM   #10
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Phy, Yes, spray as much of the cables as you can! Then I change the top, If I had it raised, the I lower it and do them again. You can't get to the area over the grey/black tanks unless you do that. Going top take those pics now
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Old 10-16-2017, 09:47 AM   #11
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Phy, here's a couple of cable shots. Now that I see how the pics are shown, here's how they relate. Should you lube the entire cable-- YES! Here's why.
First photo shows the REAR cable with the top UP, Same with the second pic. But when the top is lowered, the first pic paint spots disappear over the tanks and in the third photo the second shot paint spots go aft about 3-1/2 foot around the pulleys. Same thing happens with the front cables except they don't go over the tanks. Bottom line, when lubed in the down position, you can't lube what's in the walls correctly (that's four 3-1/2foot each corner) or what's on top of the tanks! Thus, Treeclimber lubes when raised AND when lowered. Does that help?
Attached Images
File Type: jpg rear cables front.jpg (171.2 KB, 8 views)
File Type: jpg rear cables raised.jpg (151.2 KB, 8 views)
File Type: jpg rear lowered.jpg (157.8 KB, 8 views)
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Old 10-16-2017, 10:25 AM   #12
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Phy:

Remember to pull the interior trim cap so you can spray the lube down the cable. I just press the Jet Lube spray tip gently. I really try to avoid "spraying" the Jet Lube and instead try to let it gently come out of the spray tip and slowly work it's way down the cable, with gravity doing the work! Then, get under the trailer and repeat on the horizontal portions of the cable. That's the slow part as I keep trying to work my way along the length of each cable, again, gently squeezing the spray tip so the Jet Lube just oozes out. As Tree says, treat the cables once with the top up, then do it again with the top down.

I'm guessing your other question is "what product do you use on the rod" not "road"?. I use the spray can of white lithium grease that is available at Walmart and all auto parts stores. Spray it on the rod and rub it along with my finger to get good coverage. I also use this grease on the ball hitch as well as to grease the ends of the bars on the weight distributing hitch. It really doesn't make much difference. I have used wheel bearing grease, too. Just lube it a couple of times a year and you'll be good to go.
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Old 10-16-2017, 02:10 PM   #13
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Thank you!!
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Old 10-16-2017, 02:16 PM   #14
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Thanks, piperjim! I did mean rod. Typing on the phone in low light conditions...lol! Phylana
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Old 10-16-2017, 02:25 PM   #15
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Yes, that helps! Basically, anywhere I see cable I need to spray it. And I do need to remove the top plate (wood panel cover) all along the inside of the trailer. Right?
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Old 10-16-2017, 03:15 PM   #16
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Quote:
Originally Posted by Phylana View Post
Yes, that helps! Basically, anywhere I see cable I need to spray it. And I do need to remove the top plate (wood panel cover) all along the inside of the trailer. Right?
Yes, you do. Except probably at the ends. I doubt you will find cables or pulleys there. But, DO pull up all the side sections.

- Jack
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Old 10-16-2017, 03:43 PM   #17
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Thanks! I have taken a few pics and I’m really concerned by what I’m seeing. In the bedroom, on the driver side the lip is almost flush and it appears that it’s bulging out and being sucked up into the bedroom (hopefully the attached pics will help).

The pic from the outside shows how the top is being pulled in and up at the driver cable. You can see how distorted it is from the view from the back shooting towards the front. The inside shots show how high the driver side is and how the passenger side sets. I think the passenger side is set correctly, in the bedroom. Haven’t even talked about the from of the trailer. Thanks much!!
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Old 10-16-2017, 05:25 PM   #18
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I really think the seal is too high. Take another look at the "door" pic in the other post I sent you. There is only one seal, it is attached to the top and just needs to meet the trim at the top of the lower section. Two of your pics look like your seal is ABOVE that trim, not good.
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Old 10-16-2017, 08:29 PM   #19
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Yeah, I’m pretty sure the top has been torqued out of alignment. I found the bolts and the two closest to the front are bent all out of whack. The little rubber pulley inside has been partially broken off too. And the slide, which is on that same side is about 2” short of being fully seated in its frame.
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File Type: jpg 76034080-9BE7-4BCB-8F5B-8A7687E85A69.jpg (181.7 KB, 6 views)
File Type: jpg 3FD24FBB-FD55-4381-9BF1-CA83CD0F3E5D.jpg (306.3 KB, 4 views)
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Old 10-16-2017, 10:01 PM   #20
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Phy:

Not sure if you want to do all your own work, but if not, you're lucky to live in a part of the country with a couple of experienced Hi-Lo repair shops. Sometime in the next year or so, I hope to get back that way and have a couple of items that are above my limits of ability or patience, repaired. If you're in the same boat, you might consider either of these businesses:

Home - JR REPAIR

Midget RV & Trailer Service HiLo Specialist

It's great to know they're there for us!
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