In a fit of cost reduction, Cummins produced some ISC and nearly all ISL without coolant filter heads. There is a location on the RH side of the cylinder block to the rear of the lube oil filter plus another location further back near the rear where the filter head assembly can be mounted.
I am attaching a line drawing from Cummins Quick Serve On Line web based service manual and parts book.
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Spike45
Gary Spires
Retired Cummins (Fleetguard) Field Engineer
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Spike,
I took a look at mine and see where they used the center two holes as the supply and return lines for the water cooled turbo. I have a pre DPF ISL 400 in my 08 coach.
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Posts: 37,725
Luckily I have one one my ISC!
Wish I had two fuel filters though.
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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
Luckily I have one one my ISC!
Wish I had two fuel filters though.
What filter are you currently running? It should have one that is both fuel/water separating as well as meeting the fluid cleanliness needs of the system. Is this an issue of hard to service or short operating life?
__________________
Spike45
Gary Spires
Retired Cummins (Fleetguard) Field Engineer
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
Quote:
Originally Posted by spike45
What filter are you currently running? It should have one that is both fuel/water separating as well as meeting the fluid cleanliness needs of the system. Is this an issue of hard to service or short operating life?
Gary:
No issue with it, just thought two filters would work better, like on a CAT, one prefilter (30 micron as I remember) and a 2 micron final one.
Well, I did have one issue: be sure the water drain is CLOSED before turning on the fuel pump!!
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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
I added a Coolant Filter to my ISC. Pics are at: logthumper's photos and albums on webshots or Click on Logthumpers Photos at botom of this post.
Click on "Makeing it ours". Filter pics are on the 2nd page. The two shut off valves allow changeing the filter withour loss of coolant. Location allows for easy checking and maintenance.
Gary:
No issue with it, just thought two filters would work better, like on a CAT, one prefilter (30 micron as I remember) and a 2 micron final one.
Well, I did have one issue: be sure the water drain is CLOSED before turning on the fuel pump!!
Caterpillar engines have the main fuel filter on the pressure side of the transfer (lift) pump thus adding a suction side filter works well. Cummins engines, yours in particular have the main fuel filter as a suction filter. Adding another may cause excessive inlet restriction to the lift pump. The result would be that neither filter would reach its potential for capacity as the combined restriction must not exceed 4PSID on the suction side. You can do it, just be aware that with some plugging the ECM will sense the reduced fuel and derate the engine.
__________________
Spike45
Gary Spires
Retired Cummins (Fleetguard) Field Engineer
Linear Mode
