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Old 09-04-2015, 10:46 PM   #1
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Hydrolic leveling jack additive

I have tried the return spring replacement, tried WD 40 treatment , I have tried talking with and to the jack. My 1998 LY motor home jack rear will not return all the time. Now the front driver side sticks sometimes. My question is has anyone tried with any seccess an additive a magic bullet like maybe one of the sea foam line of products that would clean these jacks up from the inside and make them work better?
Any help with this would be appreciated .
Thanks
Trident
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Old 09-04-2015, 11:35 PM   #2
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I have tried the return spring replacement, tried WD 40 treatment , I have tried talking with and to the jack. My 1998 LY motor home jack rear will not return all the time. Now the front driver side sticks sometimes. My question is has anyone tried with any seccess an additive a magic bullet like maybe one of the sea foam line of products that would clean these jacks up from the inside and make them work better?
Any help with this would be appreciated .
Thanks
Trident
If you have HWH jacks, your problem might be with a sticky extend solenoid. Next time it sticks, you can to manually opening the solenoid to allow the hydraulic fluid to return to the reservoir by the retract springs' action.

Look for the center 1/4"nut on the correct solenoid and open it (lefty loosy) exactly 4.5 turns. If that allows our jack to fully retract, then you need a new solenoid.
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Old 09-05-2015, 05:32 AM   #3
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Suggest cleaning the exposed part of the cylinder (the rod) with something like WD-40, wiping it clean and dry, then give it a liberal coat of spray silicone. The silicone will not attract dust and damage seals.
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Old 09-05-2015, 07:44 AM   #4
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If you have HWH jacks, your problem might be with a sticky extend solenoid. Next time it sticks, you can to manually opening the solenoid to allow the hydraulic fluid to return to the reservoir by the retract springs' action.



Look for the center 1/4"nut on the correct solenoid and open it (lefty loosy) exactly 4.5 turns. If that allows our jack to fully retract, then you need a new solenoid.

I will give that a try thanks.
When the store light is on I can clime under the RV grab the base of the jack with vise grips and work it back and forth and the jack will close not easy but it works. The piston is sticking in the cylinder.
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Old 09-05-2015, 10:57 AM   #5
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Suggest cleaning the exposed part of the cylinder (the rod) with something like WD-40, wiping it clean and dry, then give it a liberal coat of spray silicone. The silicone will not attract dust and damage seals.
HWH does NOT recommend using any lubricants on the jack cylinder.
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Old 09-06-2015, 07:18 AM   #6
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I would not recommend using lubricant on the cylinder rod either, but did use silicone spray on our 2004 Land Yacht. Lubricants will attract dust and dirt and they can damage seals. Silicone will not attract dust and dirt.
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Old 09-07-2015, 02:33 PM   #7
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jacks

I have HWH jacks on my LY & have had 1 off before. Going to have to remove another for repair & resealing might just do them all this winter. We have a place here in Denver called Rocket Seals. They can match any seals. If you can't find a similar place ck w/ local forklift companies, they'll have someone they use. 1way cylinders are pretty easy to do & it seems most of the problems are just worn out o rings. I don't know of any additive for hydraulics but it does need changing if it's original fluid.
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