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12-06-2016, 12:08 PM
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#1
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Senior Member
Newmar Owners Club Workhorse Chassis Owner Spartan Chassis
Join Date: May 2010
Location: McAlester Ok
Posts: 2,057
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Hydraulic Filter change....?? Cummins 350 ISL
I am at Speedco, getting service. They say they aren't allowed to change the hydraulic filter. I am not sure why, it looks like a simple change. I may try to do it myself, depending on the answers you guys give me.
It looks like an easy filter removal, HOWEVER, it looks like it's going to make a big mess when all the fluid drains out of the reservoir located next and above the filters.
I would appreciate your experiences and suggestions. 
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2007 Newmar KSDP. 3912
2010 Nissan Frontier SE
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12-06-2016, 12:12 PM
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#2
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Senior Member
Join Date: May 2013
Location: Ontario, California
Posts: 2,429
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It's just like an automotive oil filter, nothing to it. put a small pan under the filter when you remove it and find out what kind of hydraulic fluid it requires. I'd fill the filter with fresh fluid when replacing. Garber and a whole host of companies make the filter, including Cummins Fleetguard
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[SIGPIC][/SIGPIC]2016 Newmar Dutch Star 4369
Newmar Owners Club
USAF 1966-1969,- Law Enforcement 1969 - 2003, Retired since March 2003
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12-06-2016, 04:57 PM
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#3
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Junior Member
Monaco Owners Club
Join Date: Feb 2014
Posts: 19
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I'm trying to change mine as well but am having alot of trouble finding filters
Drew
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Drew and Robin
1997 Monaco Dynasty 35'
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12-06-2016, 05:36 PM
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#4
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Senior Member
Newmar Owners Club Workhorse Chassis Owner Spartan Chassis
Join Date: May 2010
Location: McAlester Ok
Posts: 2,057
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I have the filter, I ordered it from the Cummins filter folks.
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2007 Newmar KSDP. 3912
2010 Nissan Frontier SE
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12-06-2016, 09:09 PM
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#5
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Senior Member
Country Coach Owners Club
Join Date: Dec 2010
Posts: 7,789
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My hydraulic filter "can" take three smaller filters. What I do is use a large trash bag and tape it under and around the area and have at it. The bag will catch the largest percentage of the oil, no problem.
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Don
2002 Country Coach Intrigue
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12-06-2016, 09:48 PM
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#6
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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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normally, the filters for hyd systems are inside the reservoir. Not sure why that would be against speedco sop, but in your case, it does appear to be readily accessible. Make sure you release the pressure.
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2003 Scepter 40PDBB - Roadmaster RR8S - Cummins ISC350 - purch aug16
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12-07-2016, 05:31 AM
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#7
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Senior Member
Holiday Rambler Owners Club
Join Date: Apr 2016
Posts: 596
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I changed ours two years ago, I removed the hose on the bottom and it ran into a drain pan, remove the clamp on the top and remove the lid, inside there are usually 2 or 3 filters stacked. Probably the easiest item to service in a coach. My local RV dealer had the filters in stock.
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2002 Holiday Rambler Imperial 40PKD
with Residential refrigerator conversion
2014 Jeep Wrangler in tow, M&G brake system
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12-07-2016, 07:02 AM
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#8
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Senior Member
Join Date: Jun 2005
Location: Indiana
Posts: 1,189
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A lot of oil will run out while changing the filter. Spartan told me they remove dipstick and plug dipstick hole so that reservoir can't breath while changing filter. Lack of venting will slow the oil escaping down to a trickle. I have not tried this yet but will in the future.
This also might be a good time to go ahead and change the oil also. Also according to Spartan changing the fluid in the reservoir is all you can do, no way to actually get all the oil out of the rest of the system.
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2018 Phaeton 40IH
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12-07-2016, 10:51 AM
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#9
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Senior Member
Join Date: Jun 2012
Location: AB
Posts: 7,587
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Here is some good bedtime reading regarding hydraulic system maintenance. Changing oil and filters just because is not only a waste of money but can do more harm than good. Taking an annual oil sample would be a better way to spend your money.
The Seven Most Common Hydraulic Equipment Mistakes
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2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
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12-07-2016, 10:54 AM
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#10
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Yep, thats gona make a mess.
I also have a spin-on filter, but it's mounted higher than the reservoir.
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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12-08-2016, 06:08 PM
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#11
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Senior Member
Nor'easters Club
Join Date: Nov 2009
Location: Rochester, NY
Posts: 341
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Yes, removing the reservoir dipstick and plugging the dipstick hole with a solid rubber stopper works very well. I purchased the stopper at the local hardware store. After removing the filter, slowly removing the plug allows for a controlled oil flow while draining the system. After the system is drained, also open the top of the reservoir and replace the in-tank filter. That filter came from Spartan, the only place I could find it.
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Bob Flight, Rochester, NY- '02 Travel Supreme
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12-09-2016, 12:51 PM
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#12
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Junior Member
Monaco Owners Club
Join Date: Feb 2014
Posts: 19
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Is it just ATF fluid that goes back in?
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Drew and Robin
1997 Monaco Dynasty 35'
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12-09-2016, 01:19 PM
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#13
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Senior Member
Join Date: Jun 2012
Location: AB
Posts: 7,587
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Quote:
Originally Posted by DREWnROBIN
Is it just ATF fluid that goes back in?
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No, use Hydraulic Fluid only. 
__________________
2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
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12-09-2016, 01:43 PM
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#14
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Quote:
Originally Posted by DREWnROBIN
Is it just ATF fluid that goes back in?
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You really need to look that up in your owners manual, or call Monaco customer support with your coach serial number, to get the answer to that.
At different times, and models, Monaco used 3 different fluids in the hyd system. AW46 Hydraulic fluid, ATF, or 15-40 engine oil.
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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