Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 03-02-2021, 07:22 AM   #1
Senior Member
Join Date: Sep 2015
Location: Red Bluff, Ca
Posts: 268
HWH Jack Issue/Problem

My 1998 Alpine 36FDS has the HWH 610 system.

The driver side rear jack will not extend.

Since all of the other jacks extend automatically or by using the the individual buttons I assume that neither the pump nor the solenoids are at fault. Is that correct?

I have not checked fluid level yet. Could low fluid level affect only one jack?

Where should I begin?

Thanks for suggestions.
1998 36FDS Alpine
Red Bluff, Ca.
gmcgene is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! 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 03-02-2021, 07:32 AM   #2
Senior Member
Old Scout's Avatar
Join Date: Nov 2005
Posts: 6,572
Low fluid could be an issue but that would be very low and would vary by jack based on jack deployment sequence ....does motor/pump run? does pump change pitch while running....each jack is controlled by a separate could be a solenoid or as simple as the electrical connection for that jack--either at the pump, or at the control panel, though less likely at panel...faulty jack sensor would be a secondary concern...
Old Scout
2003 Alpine 40' MDTS
New Braunfels, Texas
Old Scout is online now   Reply With Quote
Old 03-02-2021, 08:27 AM   #3
Senior Member
Join Date: Jun 2018
Location: SoOC
Posts: 415
Originally Posted by gmcgene View Post
My 1998 Alpine 36FDS has the HWH 610 system.

The driver side rear jack will not extend. Where should I begin?
My solved HWH 625 issue was a single fuse, almost inserted properly. This, after studying the schematic diagram, etc. for more than an hour. Start with the simple.
2007 Alpine SE 34FDDS + Cherokee Trailhawk
whalepirot is offline   Reply With Quote
Old 03-02-2021, 09:53 AM   #4
Senior Member
Old Scout's Avatar
Join Date: Nov 2005
Posts: 6,572
Agree--keep it simple....the rest of the system seems to work so focus on the jack electrical connections fist.....
Old Scout
2003 Alpine 40' MDTS
New Braunfels, Texas
Old Scout is online now   Reply With Quote
Old 03-02-2021, 11:45 PM   #5
Senior Member
Mule Skinner's Avatar
Join Date: Jul 2006
Location: Saratoga, CA
Posts: 283
Check the electric plug for the home position switch at the jack. unplug it, shake it, blow on it, say a prayer and plug it back in.
good luck!
Dan and Patty
"04" Alpine 34' FDDS 2018 Jeep Grand Cherokee
Saratoga, CA
Mule Skinner is offline   Reply With Quote
Old 03-03-2021, 10:00 AM   #6
Senior Member
Ljwt330's Avatar
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 2,987
Here is a link to a pdf for the HWH 625 service manual.


Hope this can help.
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
Ljwt330 is offline   Reply With Quote
Old 03-06-2021, 12:45 PM   #7
Senior Member
Sco70ttie's Avatar
Join Date: Aug 2017
Location: Warrenton, Va.
Posts: 251

Here a picture of the solenoids and I have a manual for the model 610.


Click image for larger version

Name:	IMG_6230.jpg
Views:	5
Size:	196.9 KB
ID:	320317Click image for larger version

Name:	IMG_6231.jpg
Views:	4
Size:	240.8 KB
ID:	320318
Scott Shaffer
1998 Alpine 36 SDS
Warrenton, Va.
Sco70ttie is offline   Reply With Quote
Old 03-07-2021, 11:17 AM   #8
Senior Member
Commercial Member
Join Date: Jun 2005
Location: behind the steering wheel
Posts: 2,048
first, unplug the pressure switch on that jack. manually extend the rear jacks until they lift a little distance.
do an ohms test from the unplugged wire to ground. if it does not show a ground, replace it.
if it shows a ground, go to the hydraulic solenoid for that jack. do an ohms test between the two wires in the connector from the solenoid. it should read 10.6 to 15.6 ohms.
if its outside those parameters, replace it. it would be good to ohm test all of the solenoids. if those read ok, then start suspecting the control box.
BUT do the simple stuff first. do not start replacing parts till you are confident you are correct.
above all else, get a service manual. thats the key to a correct diagnosis.
if you need help, please call me at 602 549 3638
paul maddox
i work for hwh corp. i do not sell parts or solicit service work on this forum.
azpete is offline   Reply With Quote

hwh, problem

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Weird HWH jack issue. Help!!!! Retired_Helo_Pilot Class A Motorhome Discussions 24 06-28-2017 11:53 PM
HWH jack issue Magredvet Newmar Owner's Forum 23 01-31-2017 04:37 AM
HWH jack issue BarbRN Winnebago Industries Owner's Forum 16 09-26-2012 09:33 AM
HWH 325 Jack Issue TimLoon MH-General Discussions & Problems 2 09-16-2012 05:53 PM
HWH Spring Foot slipped off jack issue jhanan RV Systems & Appliances 11 09-06-2011 11:11 PM

All times are GMT -6. The time now is 02:41 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.