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Old 01-07-2020, 03:13 PM   #1
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Cummins ISL 400 Fuel Filters in 2006 Monaco

Seeking information on the number and location of the fuel filters in my pre-DEF 2006 Monaco Diplomat 40 PAQ with ISL 400 engine (ESN 46575949).
I've tried the Cummins Quickserve online tool, but have had no success with it.

I believe one filter is located in the left second to rear compartment, by the leveling jack reservoir. Current one there is a Baldwin BF 1293-SPS. It's a fuel/water separator.
Are there other fuel filters in this RV?
TIA for any info.
Steve
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Old 01-07-2020, 08:00 PM   #2
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Take a quick look underneath straight above the starter and you will see the secondary filter.

FUEL Primary
FS 1003 Fleet Guard
NAPA 3604 WIX 33604

Fuel Secondary
FF 5488 Fleet Guard
NAPA 3697
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Old 01-07-2020, 11:40 PM   #3
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This should be what you need.


ENGINE ISL 400 SERIAL #
OIL - LF9009 FLEETGUARD
AIR - P533930 DONALDSON (EAF51009)
FUEL PRIMARY - FS1003 FLEETGUARD
(FS19596) FLEETGUARD
FUEL SECONDARY - FF5488 FLEETGUARD
(3959612) FLEETGUARD
ENGINE BELT - 3972263 CUMMINS
080830 NAPA
HYDRAULIC FILTER - 84365A NELSON (10 MICRON)
DESICCANT FILTER - R950011 MERITOR WABCO

ENGINE OIL
15-40 ROTELLA 28 QUARTS W/FILTER

TRANSMISSION OIL (ALLISON MH3) TRANSYND

ONAN GENERATOR 8500 MODEL #8HDKAK11451J
15-40 ROTELLA 3 QUARTS W/FILTER
OIL FILTER- 122-0833 ONAN
AIR FILTER 140-2897 ONAN
FUEL FILTER 149-2513 ONAN


BRAKE FLUID - DOT 3
GREASE MULTI - PURPOSE LITHIUM SOAP BASE
GEAR OIL - PENZOIL GEAR PLUS SUPER -EW 75W-90, SYNTHETIC
COOLANT 50/50 - FINAL CHARGE
HYDRAULIC FLUID ROTELLA 15W-40W
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Old 08-09-2022, 11:59 AM   #4
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Monaco Diplomat 2006 PAQ fuel filter 5488 location

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Originally Posted by Twomed View Post
Take a quick look underneath straight above the starter and you will see the secondary filter.

FUEL Primary
FS 1003 Fleet Guard
NAPA 3604 WIX 33604

Fuel Secondary
FF 5488 Fleet Guard
NAPA 3697

Twomed, I've looked from underneath, and don't see the secondary fuel filter in the location you suggested. Is it only accessible from above, inside the coach looking down?
(I'm the originator of the thread)
Thanks
Steve
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Old 08-09-2022, 09:52 PM   #5
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Both of your filters should be inside the louvered bay door in front of the driver's side rear wheel. Open the louvered door and use the barrel key to open the hinge door that contains the air conditioning condenser. Behind the condenser is hydraulic pump, air dryer filter and both fuel filters.

Remove one, fill the new one, reinstall and start the coach. Once it's running, do the second filter the same way.
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Old 08-10-2022, 09:53 AM   #6
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You can download a manual from this link:
https://www.monacocoach.com/service-...pairs/#manuals

This electronic file has some embedded clips, so a lot of the key words are not searchable. But you can find most info from the index at the end.
Fuel filter discussion is on p. 312.

As Twomed and Dutch Star Don indicated, the manual shows these on filter chart p. 319:
Primary: Fleetquard FS1003
Secondary: Fleetguard FF5488
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Old 08-10-2022, 03:29 PM   #7
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Secondary Fuel Filter still not found

Quote:
Originally Posted by Dutch Star Don View Post
Both of your filters should be inside the louvered bay door in front of the driver's side rear wheel. Open the louvered door and use the barrel key to open the hinge door that contains the air conditioning condenser. Behind the condenser is hydraulic pump, air dryer filter and both fuel filters.

Remove one, fill the new one, reinstall and start the coach. Once it's running, do the second filter the same way.
Don, the only fuel filter in that compartment is the Primary (NAPA 3604=FS1003). Any other thoughts where the secondary might be?
Steve
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Old 08-10-2022, 06:46 PM   #8
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Quote:
Originally Posted by szakaluk View Post
Don, the only fuel filter in that compartment is the Primary (NAPA 3604=FS1003). Any other thoughts where the secondary might be?
Steve
My 2005 Diplomat had both filters there, but my neighbor's 2008 Diplomat had it at the back of the coach. I think you have a solid door on both sides of the engine door. His was behind the one on the passenger side. Open the door and look down. On his, I tried EVERY trick I know and couldn't break the spin on filter loose. I finally disconnected the hoses and unbolted it and did it on the bench. It's in a difficult spot to reach.
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Old 08-11-2022, 10:44 AM   #9
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Quote:
Originally Posted by Dutch Star Don View Post
My 2005 Diplomat had both filters there, but my neighbor's 2008 Diplomat had it at the back of the coach. I think you have a solid door on both sides of the engine door. His was behind the one on the passenger side. Open the door and look down. On his, I tried EVERY trick I know and couldn't break the spin on filter loose. I finally disconnected the hoses and unbolted it and did it on the bench. It's in a difficult spot to reach.
Don, thanks for steering me in the right direction. I finally heard back from Monaco, and although the old Monaco Coach went into bankruptcy in 2009, they had a Tech that remembered where it is. The location shown in the manual is wrong.

It's in the very rear and on the right side of the coach, about 12 inches in from the right rear corner (behind where the splash guard hangs.)
It can be seen by looking through the access hole where the oil dipstick is located. I see your point about difficult access.
Thanks again. Steve
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Old 08-11-2022, 11:00 AM   #10
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Quote:
Originally Posted by szakaluk View Post
Don, thanks for steering me in the right direction. I finally heard back from Monaco, and although the old Monaco Coach went into bankruptcy in 2009, they had a Tech that remembered where it is. The location shown in the manual is wrong.

It's in the very rear and on the right side of the coach, about 12 inches in from the right rear corner (behind where the splash guard hangs.)
It can be seen by looking through the access hole where the oil dipstick is located. I see your point about difficult access.
Thanks again. Steve
Just replaced both of mine 2007 Monaco diplomat. There's a thread from couple of weeks ago. The water separator filter had middle gasket but the filter in the passenger rear panel did not. I'll be curious what you find.
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Old 08-12-2022, 05:19 AM   #11
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Monaco Diplomat secondary fuel filter gasket

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Originally Posted by okcnewbie View Post
Just replaced both of mine 2007 Monaco diplomat. There's a thread from couple of weeks ago. The water separator filter had middle gasket but the filter in the passenger rear panel did not. I'll be curious what you find.
Okcnewbie,

Did you have any difficulty removing the secondary filter?
Steve
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Old 08-12-2022, 05:40 PM   #12
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If it's been changed since new, you may be able to turn it by hand. The one I did for the neighbor was original and had been on there for 6-7 years. Grabbing it with just one hand through the rear door didn't work and I have big mitts. I went underneath and tried several strap types. Finally, I just pulled it and did it on the bench.

Looking back, maybe a metal strap type that uses a ratchet wrench to turn it might work. You could then use a long extension from under the coach.
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Old 08-13-2022, 05:18 AM   #13
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Don, Thanks. (Thanks button won't work for me.)
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Old 08-13-2022, 06:07 AM   #14
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Quote:
Originally Posted by szakaluk View Post
Seeking information on the number and location of the fuel filters in my pre-DEF 2006 Monaco Diplomat 40 PAQ with ISL 400 engine (ESN 46575949).
I've tried the Cummins Quickserve online tool, but have had no success with it.

I believe one filter is located in the left second to rear compartment, by the leveling jack reservoir. Current one there is a Baldwin BF 1293-SPS. It's a fuel/water separator.
Are there other fuel filters in this RV?
TIA for any info.
Steve
My 06 Ambassador which is very similar to your coach...

Primary filter with water trap is in the hydraulic bay behind rear axle as you suspect.

Secondary filter is behind the rear cap, passenger's side. There is a removable panel there (the oil dipstick/trans dipstick/PS tank there) that you can remove to easily access that filter.

I can supply my filter numbers if you wish.
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