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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.

HiLo "Video" owners manuals... youtube!
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Old 09-20-2017, 10:21 AM   #6
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Quote:
Originally Posted by keystone View Post
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.

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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
Tree
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