I just do not concur with “following Lipperts service PDFs” when it comes to what fluid to put in your hydraulic fluid reservoir.. Neither does Lippert..
The system is made by them but installed by different vendors..such as Keystone and Jayco.. Neither come from factory with ATF fluid in the reservoir. It is AW32..
Chat today with Lippert Support .....
John (10/21/2019, 1:51:14 PM): Hello Chuck Steed. How may I assist you Today? -- Tech
Me (10/21/2019, 1:53:15 PM): I currently have a 2014 Alpine with all hydraulic slides and six point level up... The fluid that is in my reservoir is NOT ATF fluid.. it is AW32 honey colored and came that way from factory.. All the Support Lippert PDFs I can find say to service with ATF BUT iM NOT FOND OF THE IDEA OF mixing fluid types.. I am wanting to extract the fluid from reservoir and re-service with fresh fluid
John (10/21/2019, 1:54:01 PM): Just use Hydraulic fluid AW32 weight. Jayco and Keystone will use Hydraulic oil which is completely fine
Me (10/21/2019, 1:54:56 PM): OK so just curious as to why all the support docs state ATF? I gather its because you folks make the hydraulic system and then the RV builder installs it and services with what they prefer to use
John (10/21/2019, 1:55:21 PM): You are 100 % correct Chuck
Me (10/21/2019, 1:55:37 PM): OK that's all I needed to know and thanks for your time
John (10/21/2019, 1:55:56 PM): No problem! Enjoy your days
Mixing fluid types IS NOT a smart idea and they have different qualities ...ATF being high detergent..
Your hydraulic cylinder actuators, seals, etc will most likely last much longer by staying with the “original” type of fluid it was initially serviced with..
AW32 is specifically designed to operate at high pressure.. the typical pump pressure in the Lippert Hydraulic system is well over 2000psi...
ATF is designed for lower operating pressure but higher temperatures..
Seal swelling can be incurred if you mix the two types of fluid in your system
YMMV
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2007 GMC Classic club cab 4x4 Duramax LBZ
2014 Alpine 3010 RE. 34 foot fifth wheel
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