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05-05-2015, 11:18 AM
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#1
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Senior Member
Join Date: Feb 2012
Location: Southern California
Posts: 1,550
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HWI Jacks Are Getting Stubborn!!
It is my understanding the the HWI Jack System is a closed system - no way to add oil to these hydroponic jacks.
Reason for my question: Ours are getting slow to descend. We have to manipulate our coach HWI jack levers (inside out coach) several times for the fluid to activate the jacks in the downward direction. These jacks and our coach is from 1999.
Suggestions - thoughts?
__________________
2006 Monaco Signature 45' Commander IV ISX 600 & 12.5 KW Genset
2013 Avalanche toad
And a rather large and very hairy Bear for a traveling companion
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05-05-2015, 11:26 AM
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#2
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Senior Member
Newmar Owners Club
Join Date: Jan 2010
Location: Louisville, Ky.
Posts: 509
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Springs could be getting weak, but before you replace them, with jacks fully extended, wash clean and then liberally wipe them down with transmission fluid, it worked for me ,hope it helps!
__________________
2011 Newmar MADP 4344, Tow vehicle, 2017 Ford Edge Titanium, Roadmaster Night Hawk tow bar and base plates Member of FMCA,Newmar Kountry Club, Good Sams , KOA,RV.Net, and IRV2.
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05-05-2015, 11:29 AM
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#3
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Senior Member
Newmar Owners Club
Join Date: Jan 2010
Location: Louisville, Ky.
Posts: 509
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Quote:
Originally Posted by dav-cle
Springs could be getting weak, but before you replace them, with jacks fully extended, wash clean and then liberally wipe them down with transmission fluid, it worked for me ,hope it helps!
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Oooops sorry read your post again and it says descend, but may still help !
__________________
2011 Newmar MADP 4344, Tow vehicle, 2017 Ford Edge Titanium, Roadmaster Night Hawk tow bar and base plates Member of FMCA,Newmar Kountry Club, Good Sams , KOA,RV.Net, and IRV2.
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05-05-2015, 11:50 AM
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#4
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Senior Member
Country Coach Owners Club
Join Date: Dec 2010
Posts: 8,231
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The HWH system is not a closed system. Somewhere on your coach there is a reservoir for hydraulic fluid.It will have a cap that can be removed to add fluid.
__________________
Don
2002 Country Coach Intrigue
#11427
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05-05-2015, 11:51 AM
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#5
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Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 10,368
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Quote:
Originally Posted by Just For Fun
It is my understanding the the HWI Jack System is a closed system - no way to add oil to these hydroponic jacks.
Reason for my question: Ours are getting slow to descend. We have to manipulate our coach HWI jack levers (inside out coach) several times for the fluid to activate the jacks in the downward direction. These jacks and our coach is from 1999.
Suggestions - thoughts?
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Well,
I have to shake my head on this one. Usually, "Descend" means going DOWN. "Ascend" means going UP. So, are yours having issues when you're making them go down, to level the coach or, bring them back up, in getting ready to leave camp???
Second, I'm assuming when you say "HWI" you mean HWH, correct??
Third, isn't the word "Hydroponic" normally associated with GARDENING and, not leveling jacks on motor homes? I'm also assuming you mean HYDRAULIC.
Now, if your coaches jacks are having a hard time going DOWN, as in sending them down to level the coach, then is your HYRAULIC pump pumping at full speed? Are your batteries up to snuff?
IF, your jacks are having a hard time ASCENDING, or, going up, in prep for departure from home or a campsite, then it could be a common problem of weak springs. It's happened to a few thousand HWH equipped coaches out there. There's a couple of answers. One, there's newer version of the return springs you can purchase that are stronger.
Two, many on here have actually sprayed the jack rams with either WD-40 (supposedly not recommended by HWH) or, wiped them down with ATF and then wipe them clean and, have reported that the jacks now go up considerably faster then previously.
Third, in some cases, there's retrofit seal kits that are new and improved versions that allow the rams to move more freely and therefore, pose less restriction on them, allowing for the springs to retract the jacks more easily. Hope this helps some.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '20 Honda NC750X DCT
 2018 Goldwing Tour DCT Airbag
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Heidi character, (mini Schnauzer)!
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05-05-2015, 07:52 PM
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#6
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Junior Member
Join Date: May 2015
Posts: 3
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Quote:
Originally Posted by Just For Fun
It is my understanding the the HWI Jack System is a closed system - no way to add oil to these hydroponic jacks.
Reason for my question: Ours are getting slow to descend. We have to manipulate our coach HWI jack levers (inside out coach) several times for the fluid to activate the jacks in the downward direction. These jacks and our coach is from 1999.
Suggestions - thoughts?
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I had a similar issue with my 2000 Pace Arrow. I used a silicone spray when th jacks were exended then ran them up.....brought them down.....resprayed. I did this three or four times. It helped. I chose silicone over an oil based lube so road dust didn't ceate unwanted problems.
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05-05-2015, 08:25 PM
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#7
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Senior Member
Join Date: May 2013
Posts: 381
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HWH recommends WD-40 as a cleaner/lube on the jack cylinders.
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05-05-2015, 08:40 PM
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#8
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Senior Member
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 10,368
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Quote:
Originally Posted by bailiff
HWH recommends WD-40 as a cleaner/lube on the jack cylinders.
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Yeah, that recommendation has been changed a couple of times. They used to NOT recommend it but, if it's recommended now, then, I guess they've decided it's OK for their systems and seals. Good to know.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '20 Honda NC750X DCT
 2018 Goldwing Tour DCT Airbag
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Heidi character, (mini Schnauzer)!
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05-06-2015, 06:10 AM
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#9
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Senior Member
Join Date: Jul 2010
Location: Conway, SC
Posts: 2,557
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I've been using WD40 on ours for 5yrs. and it works great. The trick is to extend the pistons, then spray them, then wipe them down really good to get it all off. If you don't clean them off good, the WD40 will work like a dirt magnet.
__________________
2000 Dutch Star Pusher
2009 Saturn Vue Towed
Full timed for 6yrs.
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05-09-2015, 09:42 PM
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#10
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Senior Member
Join Date: Mar 2015
Posts: 143
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My lubricant of choice is Break Free CLP. Teflon based, and doesn't attract water, dust like WD 40
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05-09-2015, 10:36 PM
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#11
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Senior Member
Tiffin Owners Club Freightliner Owners Club
Join Date: Apr 2012
Posts: 2,079
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Several of you might want to re read the original posters statement. He said he has trouble getting his jacks to descend. I am very sure if something that is pushed down by pressure will not go down that no amount of cleaning on the shaft with anything is going to help
There have been a couple of posts on here that is good advice. Check the fluid level the HWH system will have a reservoir somewhere The OP says he has to work with the handles to get his jacks to go down. There might be a problem with the electrical connections on the controller or with the solenoids not opening up correctly. But I would say to check his fluid first that is the easiest and cheapest thing to check.
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05-10-2015, 11:34 AM
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#12
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Senior Member
Commercial Member
Join Date: Jun 2005
Location: behind the steering wheel
Posts: 2,907
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just for fun, the slow extend might be caused by a low battery. try runnig the jacks down with the engine running. it takes 105 amps to start the motor turning fast enough to generate 3200 lbs.
the pump will function down to about 10.5 volts, but it works like you described.
the place you add fluid is on top of the reservoir. download a service manual from the hwh web site. it will help with the diagnosis. i work for hwh, and i can help.
please feel free to call me at 602-549-3638 paul maddox
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05-10-2015, 05:19 PM
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#13
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Member
Join Date: Feb 2013
Posts: 55
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get a life
this is sent to fire up
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05-10-2015, 11:25 PM
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#14
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Senior Member
Join Date: Feb 2012
Location: Southern California
Posts: 1,550
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Quote:
Originally Posted by azpete
just for fun, the slow extend might be caused by a low battery. try runnig the jacks down with the engine running. it takes 105 amps to start the motor turning fast enough to generate 3200 lbs.
the pump will function down to about 10.5 volts, but it works like you described.
the place you add fluid is on top of the reservoir. download a service manual from the hwh web site. it will help with the diagnosis. i work for hwh, and i can help.
please feel free to call me at 602-549-3638 paul maddox
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Thanks all for your input.
"azpete" I'll be giving you a call this week. Thanks.
__________________
2006 Monaco Signature 45' Commander IV ISX 600 & 12.5 KW Genset
2013 Avalanche toad
And a rather large and very hairy Bear for a traveling companion
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