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Old 07-28-2018, 12:09 PM   #1
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HWH hydraulic jacks will not retract

I have an older motorhome 2000
Newmar Kountry Star 35 foot with HWH hydraulic jacks. If the temperature outside is below 60į all the jacks will retract. If it’s 70 or above I have to physically pry them back up when the switch is in the store position. Any suggestions.
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Old 07-28-2018, 12:48 PM   #2
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This is what HWH has to say about maintaining their jacks using WD40. http://www.hwhcorp.com/ml47149.pdf
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Old 07-28-2018, 12:50 PM   #3
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Clean the Jacks and the area around them with WD40. If you haven’t done this in a while, it may take a few times or an entire can to remove built up sludge.
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Old 07-28-2018, 01:06 PM   #4
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

I have no experience with hydraulic jacks as our rig has air leveling only. I have heard of many folks using WD40.


Good luck, happy trails, and God bless!
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Old 07-29-2018, 06:44 AM   #5
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Originally Posted by Rainman737 View Post
Clean the Jacks and the area around them with WD40. If you havenít done this in a while, it may take a few times or an entire can to remove built up sludge.
I did the WD40 thing, also used a fine grit sand paper to remove any built-up...
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Old 07-29-2018, 08:31 AM   #6
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Isnít there a valve you can open to bleed off the pressure to retract the units? Got to figure out the first step in trouble shooting.
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Old 07-29-2018, 08:36 AM   #7
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Contact Paul at AZPETE on the Irv2 forum. He works for HWH and can answer your questions. His email is pfmaddox@att.net and his phone number is 602-549-3638. He is a Commercial Member and has posted that his phone is always on, and if not answered, leave a message.

He has helped other on this forum and I am sure he can help you.
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Old 07-29-2018, 08:38 AM   #8
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If there is a grease zerk on jack do that. Also use silicone spray on the chrome every use, NOT WD40. No more not retracting.
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Old 07-29-2018, 10:29 AM   #9
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there is no grease zerk on the hwh jacks. as the manual states, use WD40. this is for cleaning, not lubrication. its in the manual.
silicone has a glue in it to help the silicone stick to the rod. this is what causes the slow retracting.
power gear uses chromed rods, hwh used stainless steel on his jacks.
now we use nickel impregnated steel. almost like anodizing, or plating, but more integrated into the metal.
if all four jacks are giving you a problem, cleaning will help.
if you need help, please contact me at 1-602-549-3638 or pfmaddox@att.net
please leave a message and a number. i do not call back on hangups
i dont sit at a desk, so i will call back asap.
paul f maddox
i do work for hwh. i do not sell parts or solicit service work on this forum.
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Old 07-30-2018, 01:53 PM   #10
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HWH Retracting and Extending Problem

My HWH hydraulic jacks have been very slow to retract over the last few years and I have considered replacing the shuttle valve in the hydraulic unit since the unit is sounds like it is having difficulty pumping when extending. Now after being in indoor storage all last winter, I find that the jacks do not extend eventhough the pump sounds like it is pumping hydraulic fluid. I am wondering if a defective shuttle valve would cause this.
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Old 07-31-2018, 09:39 AM   #11
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if all the jacks are effected, i would have the pump pressure checked first. the shuttle valve could be causing the problem, but do the diagnosis first. its way cheaper.
if you remove the shuttle valve, check the 3/16 nut on the bottom of the inside spindle.
you may be able to just replace it. i get mine at frys electronics.
this is not a hwh standard, or recommended repair., and we dont do that as a repair.
we replace the valve. i do this on my own coach.
if you cant maintain the same tolerances, just replace the valve.
no i dont have the measurements.
if you need a service manual, let me know what system you have, the year and make of your coach. i will email it to you. its too large for me to text.

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Old 07-31-2018, 06:49 PM   #12
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Quote:
Originally Posted by Tstafford361 View Post
I have an older motorhome 2000
Newmar Kountry Star 35 foot with HWH hydraulic jacks. If the temperature outside is below 60į all the jacks will retract. If itís 70 or above I have to physically pry them back up when the switch is in the store position. Any suggestions.

I didn't read all the replies so I hope I am not a parrot here.



Do you have the NEW spring design on your HWH jacks? The new springs are tapered at the ends.
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Old 08-01-2018, 09:55 AM   #13
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if you have the older springs, they have accumulated rust and grime between the turns on the spring. if you remove them, they are often two or three inches longer than original. when a cylinder has to be pried up, springs do not normally help.
you can try to clean them if you have them off. soak them in a pan filled with regular coca cola. the acid in that will clean them of both rust and grime.
of course you can just replace them. thats much easier.
paul maddox
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