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03-03-2017, 03:02 PM
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#1
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Senior Member
Monaco Owners Club
Join Date: Jan 2017
Location: Utopia, TX
Posts: 500
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Hydraulic fluid change interval?
Hi All,
My 2003 Dynasty manual calls for a hydraulic FILTER change annually, but I can't find a FLUID change interval.
Mine is of unknown age, but fairly clean looking and doesn't smell ugly or burned.
Is there a specified or accepted change interval for the Dexron III hydraulic fluid?
I picked up a 5-gal pail of DexIII on closeout at the auto parts store for $11! So I'm planning to change out at least 5-gal of it when I change the filter next week. Wondering if I should go ahead and plan on changing it all.
Thanks,
Walter
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2003 Monaco Dynasty 42 Regal.
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03-03-2017, 03:07 PM
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#2
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Remember that Dexron III is no longer certified by GM, so you could have been sold lemonade.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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03-03-2017, 05:30 PM
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#3
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Senior Member
Join Date: Nov 2014
Posts: 1,673
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Your not changing fluid on a new GM vehicle..... and Dex3 meets and exceeds most GM trans application on the road today and dating back to the 60's . Yes there are newer spec fluids for some newer GM applications such as Dex6 and the likes that has nothing to do with your application
That being said, Dex111 will cover your application and be fine, personally I would find the proper quantity needed for the job and do the whole deal. That way you have a clean baseline to work from.
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2004 HR Navagator 500 ISM
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03-03-2017, 05:36 PM
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#4
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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I haven't found a change interval for the hydraulic fluid. My coach had the fluid in it for 16 years with no ill effect until I drained the reservoir completely when I changed the filters last March.
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Dennis and Katherine
2000 Monaco Dynasty
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03-03-2017, 05:57 PM
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#5
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Senior Member
American Coach Owners Club
Join Date: Jan 2011
Posts: 2,742
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Dex 3 is readily available at any auto parts store.
On my Old Eagle I change the Filter and Fluid every 3 yrs. I usually run 20K miles a year.
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Chuck
Brownsburg Indiana
1992 American Eagle-8.3C-450hp
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03-03-2017, 05:58 PM
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#6
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Senior Member
Thor Owners Club Ford Super Duty Owner
Join Date: Jul 2011
Posts: 3,796
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As an alternative to a calendar or mileage interval you could send a sample out for analysis and make a determination based on what is found.
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03-03-2017, 06:07 PM
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#7
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Senior Member
Join Date: Nov 2014
Posts: 1,673
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Quote:
Originally Posted by Sweetbriar
As an alternative to a calendar or mileage interval you could send a sample out for analysis and make a determination based on what is found.
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Good call
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2004 HR Navagator 500 ISM
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03-03-2017, 06:24 PM
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#8
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Senior Member
Join Date: Jun 2012
Location: AB
Posts: 7,587
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Quote:
Originally Posted by Sweetbriar
As an alternative to a calendar or mileage interval you could send a sample out for analysis and make a determination based on what is found.
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Or every 10-12 years, whichever comes first.
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2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
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03-05-2017, 06:43 PM
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#9
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Senior Member
Texas Boomers Club Holiday Rambler Owners Club
Join Date: Jun 2002
Location: What? Like right now? ;-)
Posts: 1,302
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The Monaco Manual says once per year. But thats probably a good way to induce some contaminants. Mine also says it holds 44 quarts.
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2003 Scepter 40PDBB - Roadmaster RR8S - Cummins ISC350 - purch aug16
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03-05-2017, 06:55 PM
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#10
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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Quote:
Originally Posted by jimmy braden
The Monaco Manual says once per year. But thats probably a good way to induce some contaminants. Mine also says it holds 44 quarts.
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Jimmy, that's what I thought my manual said. What it actually says is to change the filter every year, not the fluid.
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Dennis and Katherine
2000 Monaco Dynasty
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03-06-2017, 06:58 AM
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#11
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Senior Member
Join Date: Jun 2015
Location: Florence, AL
Posts: 201
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My 2003 Roadmaster chassis takes AW46 hydraulic fluid
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2020 F350 with 7.3 Godzilla
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03-06-2017, 07:41 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: Sep 2003
Location: Quitman MS
Posts: 2,967
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Some had AW46 some had Dexron lll and some had 15w40, the 10w Dexron lll is a better fluid for the guys in the north cold weather, I personally see no reason to change the filters on time I would do it on mileage and if the fluid don't look bad or contaminated or smell bad I would leave it alone. I just can't see that much heat generated by the steering and fan motor to cause the fluid deteriorate.
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Walt & Will
2000 Dynasty
2017 Ram Big Horn Crew C 4X4 w/ M&G
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03-06-2017, 08:22 AM
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#13
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Moderator Emeritus
Monaco Owners Club Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 13,426
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Quote:
Originally Posted by grthigpen
My 2003 Roadmaster chassis takes AW46 hydraulic fluid
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So does my 2000. There seems to be no rhyme or reason to what coaches got what. My owners manual does have some warnings about low temperature operation which from what I understand is because it uses the AW46 instead of DEX or motor oil.
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Dennis and Katherine
2000 Monaco Dynasty
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03-06-2017, 11:07 AM
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#14
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Senior Member
Monaco Owners Club
Join Date: Jan 2017
Location: Utopia, TX
Posts: 500
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Thanks everybody. But the question is on FLUID change interval.
My manual states FILTER change every year. And I have a new filter to install. Is there some accepted standard fluid change interval? I'm guessing no...
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2003 Monaco Dynasty 42 Regal.
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