RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
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 06-11-2017, 12:53 PM   #1
Crypto Weenie's Avatar
Newmar Owners Club
Spartan Chassis
Join Date: Nov 2007
Posts: 30
2003 DSDP Stepwell Linear Actuator Bad

I have a 2003 DSDP. The step cover linear actuator was replaced under warranty in 2005. It stopped working again late last year and I did not bother looking at it – it was in the down position and I was unable to lift the steps to access the mechanism.Today I decided to tackle it - the actuator is bad. The current installed actuator is Duff-Norton, Model #LM100-1-S2, which is no longer available.I did locate an actuator on Amazon (of all places) that may be a suitable substitute, but I have a couple of questions regarding its specifications.

The current actuator has a stroke of 125mm (4.9 inches). The one located on Amazon has a stroke of 6 inches. The specifications indicate it has a built-in clutch to prevent over-extending and over-compressing, so it should not create problems.Additionally, the operation of the steps is controlled by the dash switch, so I should be able to limit its movement just in case.

Comments, suggestions, thoughts; I have not ordered it yet.


John & Maria
Tucky, an American Eskimo Dog (2005-2017)
2003 Newmar DSDP - 4050
Crypto Weenie 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 06-11-2017, 08:52 PM   #2
Community Moderator
"007"'s Avatar

Nor'easters Club
Workhorse Chassis Owner
iRV2 No Limits Club
Join Date: Oct 2004
Posts: 30,098
John, go into QT's # 3 and there is a section for the problem you have it will be in the second section of the QT's link.
You may find something in PROBLEM SOLVERS also that you will pass in first section of link.
All the links below in my signature have answers for your Newmar.

98KSCA, 99MACA, 03 KSCA-3740- 8.1 Chev-- ALLISON Trans
"007" is offline   Reply With Quote
Old 06-11-2017, 08:57 PM   #3
Senior Member
Join Date: Sep 2010
Posts: 3,412
You could change the mounting location in relation to the extended length.
tom chelbana is offline   Reply With Quote
Old 06-11-2017, 09:08 PM   #4
Senior Member
dennis45's Avatar
Join Date: Jun 2012
Location: AB
Posts: 7,586
Originally Posted by tom chelbana View Post
You could change the mounting location in relation to the extended length.
As Tom says, relocating the mount is easy to do and will solve your problem in that regard.
When mine failed, I tried buying from Norton but they said it was proprietary to Newmar and so I bought one from them. Expensive....
When mine failed the gearbox actually came apart by pulling the screws out of the housing. My guess is it was underrated for the weight.
Anyway, I was missing the small sun gear because I think the OP tried to fix it and lost the gear. So when I installed the new one, I fabricated a bracket to strengthen the housing. After 6+ years it's still works fine.
You may want to consider something like this for yours depending on the weight rating of the new one.
Attached Thumbnails
Click image for larger version

Name:	IMG_0558.JPG
Views:	19
Size:	180.8 KB
ID:	164896  
Attached Images
2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
dennis45 is offline   Reply With Quote
Old 06-12-2017, 07:43 AM   #5
Crypto Weenie's Avatar
Newmar Owners Club
Spartan Chassis
Join Date: Nov 2007
Posts: 30
Thanks for your replies. I noticed a common thread on those replies contained in the links supplied by 007 – the actuator motor was damaged in some form or fashion, and that is why I had to have it replaced in 2005 – the motor came apart due to the screws pulling out of the back plate.Mine is dead - I have 12v at the motor.Looking at a couple of the “fixes”, I think the addition of some reinforcement to the motor body will prevent the additional stroke of the new actuator from pulling itself apart.Not certain I can relocate the actuator attachment points; not much room under the steps and the design of the mounting fixture would seem to prevent any inexpensive modification.

Thanks again; I’ll follow up after I replace the actuator.

John & Maria
Tucky, an American Eskimo Dog (2005-2017)
2003 Newmar DSDP - 4050
Crypto Weenie 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Anyone replace a Linear Series DVD/CD/Radio? nomad10th Fleetwood Owner's Forum 0 06-07-2016 11:31 PM
Linear Logic LLC - ScangageII isa Class A Motorhome Discussions 3 02-11-2016 06:59 AM
2003 Newmar Kountry Star Class A Broken Front Entry Door Stepwell Motor--Help heyskipper Newmar Owner's Forum 2 03-27-2015 10:49 PM
Bad, bad, bad - bad vibrations.... Doc Vegas Ford Motorhome Chassis Forum 21 11-30-2014 05:56 PM
TV lift: Linear Actuators C & R Alpine Coach Owner's Forum 5 07-13-2010 05:31 AM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 08:12 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.