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12-25-2017, 08:14 PM
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#1
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Senior Member
Join Date: Oct 2017
Location: North Carolina
Posts: 122
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Hydraulic Filter Change
I want/need to change the hydraulic filter on my 2004 Monaco Dynasty My question is can I spin off the old filter without draining the reservoir or losing any ATF in the process. I don't see a shut off near the filter or anywhere in the line to the tank. My thought is that if the pump is not running to pull the ATF it shouldn't leak too much unless it's gravity fed to the filter and then pulled into the filter when the pump is on, then I guess I would need to drain the tank prior to the filter change.
Any and all suggestions are appreciated.
Thanks.
Dave
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12-25-2017, 08:51 PM
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#2
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Senior Member
Monaco Owners Club
Join Date: Oct 2009
Location: Tucson, AZ
Posts: 4,810
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No, the hydraulic fluid will run out. Mike Canter said you need a smooth vise grip to clamp off the hose from the tank. Even then you will loose some from the other direction.
I'm thinking I may just change the fluid at that time. My owners manual says the hydraulic system capacity is 50-55 quarts of Dexron III.
__________________
97 Monaco Windsor- Sold
07 Monaco Executive McKinley- Sold
04 Monaco Signature Chateau IV
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12-26-2017, 05:47 AM
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#3
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Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,346
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I don't agree with Mike Canter's advice (maybe he was referring to a specific model-hose).
On my RV the hydraulic hoses have ss braiding internally (even the suction side) and trying to clamp them shut could permanently deform the hose. That then could restrict flow through it resulting in the need to replace the hose. IMO.
I plan to change my hyd filter to. But I'm just going to be prepared to swap it out quickly and be sure to have a couple large clean containers available in case I need to throw them under the filter.
Whoever does their filter change first, post back on the process.
Good luck
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12-26-2017, 06:28 AM
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#4
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Senior Member
Monaco Owners Club
Join Date: Aug 2015
Location: Elgin, SC
Posts: 106
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I replaced my filter last year on my 2005 Monaco Dynasty with very little fluid lost. I took the old filter off and installed the new filter pre-filled with no issues.
__________________
Butch & Jo
Retired Marine/Department of Defense
2017 Monaco Diplomat
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12-26-2017, 07:49 AM
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#5
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Senior Member
Join Date: Mar 2012
Posts: 192
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It depends where yo filter is mounted. If it is below the tank the fluid will run out. If the filter is above the tank as mine is it will not run out. One size does not fit all, Monaco built them both ways.
Jim E
06 exec
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12-26-2017, 07:53 AM
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#6
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Senior Member
Monaco Owners Club
Join Date: Aug 2015
Location: Elgin, SC
Posts: 106
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My 2005 is mounted on the DS above the fuel filter. Above the tank.
__________________
Butch & Jo
Retired Marine/Department of Defense
2017 Monaco Diplomat
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12-26-2017, 07:56 AM
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#7
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Golden, Colorado
Posts: 806
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On my 04 Sig. with a Detroit 60 the Hyd. filter is mounted low down below the Hyd. tank level IT WILL keep flowing till tank is empty with no shutoff. I have seen later coaches with the filter mounted above the tank level so not much oil will come out. When Mike Canter did his he just removed the filter and oil flowed out fast. He had to race around the shop and find 5 gallon buckets to swap out when full He said luckily he had some around. He said it would of been a nightmare if he didn't have some extra buckets available. I have seen posts where others have installed valves in line after the oil was drained for the next Hyd. oil change. Just be prepared....
When I did mine I used a pump to pull most the oil out the top of the tank before removing the filter. It worked very well....
Good luck
Dave
__________________
2004 Monaco Signature with a Detroit 60, Vorad Radar, Samsung Fridge, Induction cook top, 2020 GMC Denali
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12-26-2017, 09:24 AM
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#8
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Senior Member
Monaco Owners Club
Join Date: Oct 2009
Location: On the road
Posts: 1,790
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Quote:
Originally Posted by bigjim8499
It depends where yo filter is mounted. If it is below the tank the fluid will run out. If the filter is above the tank as mine is it will not run out. One size does not fit all, Monaco built them both ways.
Jim E
06 exec
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CORRECT ANSWER...seems like on "most" of the big engines they are mounted low...flows freely, big pan, new filter ready for a quick spin on. Still messy!
Smaller engines "usually" higher mounted and easy change, almost a no spill.
Seems like it was a space issue, and trying to fit everything in the rear cap area.
__________________
Happy Trails, 
06 Dynasty Countess III ISL//3060
07 Hummer H3
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12-26-2017, 10:46 AM
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#9
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Senior Member
Monaco Owners Club
Join Date: Oct 2009
Location: Tucson, AZ
Posts: 4,810
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When you guys change the hydraulic fluid, are you using Dexron III?
Where are you purchasing it?
__________________
97 Monaco Windsor- Sold
07 Monaco Executive McKinley- Sold
04 Monaco Signature Chateau IV
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12-26-2017, 12:51 PM
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#10
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Senior Member
Join Date: Nov 2014
Posts: 1,432
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Quote:
Originally Posted by vito.a
When you guys change the hydraulic fluid, are you using Dexron III?
Where are you purchasing it?
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I used Dexron lll (as called for on my coach)
Anything that calls for Dexron lll you can also use Dexron 3-4-5-6- it meets the spec. The only reason I say this is you can sometimes catch 3-4-5-6 on sale.
I had access to a warehouse distributor at the time.
Happy Trails
__________________
2004 HR Navagator 500 ISM
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12-28-2017, 09:05 AM
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#11
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Senior Member
Monaco Owners Club
Join Date: Feb 2009
Location: Utah
Posts: 2,137
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Quote:
Originally Posted by djhinds
On my 04 Sig. with a Detroit 60 the Hyd. filter is mounted low down below the Hyd. tank level IT WILL keep flowing till tank is empty with no shutoff. I have seen later coaches with the filter mounted above the tank level so not much oil will come out. When Mike Canter did his he just removed the filter and oil flowed out fast. He had to race around the shop and find 5 gallon buckets to swap out when full He said luckily he had some around. He said it would of been a nightmare if he didn't have some extra buckets available. I have seen posts where others have installed valves in line after the oil was drained for the next Hyd. oil change. Just be prepared....
When I did mine I used a pump to pull most the oil out the top of the tank before removing the filter. It worked very well....
Good luck
Dave
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Agreed. If the filter is mounted lower than the tank it WILL drain and drain fast. I planned my filter change along with fluid replacement when we first purchased the coach. Upon draining the system I installed a ball valve in-line for future filter replacements without having to drain the entire system.
Works like a charm.
Mike.
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