Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 07-30-2013, 08:51 PM   #1
Senior Member
DGBPokes's Avatar
Newmar Owners Club
Workhorse Chassis Owner
Spartan Chassis
Join Date: May 2010
Location: McAlester Ok
Posts: 1,480
HWH Leveling jacks. Should fluid be changed?

I periodically change the transmission fluid as recommended. I have had the brake fluid changed. Never thought about the HWH fluid. I think it is a transmission/hydraulic fluid. If so is it not subject to water absorption like other hydraulic fluids?? I don't recall seeing a drain plug, and bleed points on the hoses or levelers. Could be a difficult job to flush and replace. Any experience or recommendations on this subject?

2007 Newmar KSDP. 3912
2010 Nissan Frontier SE
DGBPokes is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-30-2013, 09:38 PM   #2
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 15,610
A great question, nothing specific in my owners manual about a change, and as you say a system flush would be a bear. System on my 99 says ATF, so color could be best indicator. I imagine that because of the limited use and exposure to heat the fluid would not really break down, but contaminants could be an issue , because the tank is vented.
Guess you just put an item on my ,to be checked list.
I'm off to the HWH, web page.
Web page under FAQ, says only if contaminated.
If there is any water in the system it will be milky after use, so if you level then retract, check the fluid for anything but clear. From what I read online newer systems use a hydraulic fluid .

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is online now   Reply With Quote
Old 07-30-2013, 10:47 PM   #3
Community Moderator
"007"'s Avatar

Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 27,876
HWH jacks for everyone
HWH has their own clear fluid but most systems I have seen have the ATF red fluid.
I have never drain the system there are plugs at base of cylinders but your going to possible place air pockets in system when refilling..
I see nothing in this Manual requiring a complete fluid change just keep fluid to correct level between lines on bell vent shaft, with all jacks retracted and making sure all grounds are good for solenoids and motor mountings.
98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans, now in good hands
"007" is online now   Reply With Quote
Old 07-31-2013, 05:32 AM   #4
bluegrasser's Avatar
Triple E Owners Club
Ford Super Duty Owner
Join Date: May 2008
Location: Hornby, On.
Posts: 68
I've just had all 4 of my jack cylinders rebuilt at a local hydraulic cylinder shop. The tech said they were pretty mucky inside and that he spent quite a long time cleaning out the junk. When I got the cylinders back on I pumped out what fluid I could get with a siphon pump and replaced the fluid with dexron III. The fluid that came out was neither red not clear, but slightly red/brown. Since I am not the original owner, I have no idea what has gone on before I owned the coach. The HWH system on my coach is not a sealed system, so it would be possible to get contaminants into the fluid. Also since it is not sealed, air in the system is not a problem. By the way the jacks are working flawlessly.
04 Triple E Commander, 07 Ford Expedition
FMCA 109309
bluegrasser is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:09 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.